/*******************************************************************************
 * Copyright (c) 2000, 2019 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.aspectj.org.eclipse.jdt.internal.core.dom;

import java.util.Iterator;
import java.util.List;

import org.aspectj.org.eclipse.jdt.core.dom.*;
import org.aspectj.org.eclipse.jdt.internal.compiler.parser.ScannerHelper;

/**
 * Internal AST visitor for serializing an AST in a quick and dirty fashion.
 * For various reasons the resulting string is not necessarily legal
 * Java code; and even if it is legal Java code, it is not necessarily the string
 * that corresponds to the given AST. Although useless for most purposes, it's
 * fine for generating debug print strings.
 * <p>
 * Example usage:
 * <code>
 * <pre>
 *    NaiveASTFlattener p = new NaiveASTFlattener();
 *    node.accept(p);
 *    String result = p.getResult();
 * </pre>
 * </code>
 * Call the <code>reset</code> method to clear the previous result before reusing an
 * existing instance.
 * </p>
 *
 * @since 2.0
 */
@SuppressWarnings("rawtypes")
public class NaiveASTFlattener extends ASTVisitor {
	/**
	 * Internal synonym for {@link AST#JLS2}. Use to alleviate
	 * deprecation warnings.
	 * @deprecated
	 * @since 3.4
	 */
	private static final int JLS2 = AST.JLS2;
	
	/**
	 * Internal synonym for {@link AST#JLS3}. Use to alleviate
	 * deprecation warnings.
	 * @deprecated
	 * @since 3.4
	 */
	private static final int JLS3 = AST.JLS3;

	/**
	 * Internal synonym for {@link AST#JLS4}. Use to alleviate
	 * deprecation warnings.
	 * @deprecated
	 * @since 3.10
	 */
	private static final int JLS4 = AST.JLS4;

	/**
	 * Internal synonym for {@link AST#JLS8}. Use to alleviate
	 * deprecation warnings.
	 * @deprecated
	 * @since 3.14
	 */
	private static final int JLS8 = AST.JLS8;

	/**
	 * Internal synonym for {@link AST#JLS9}. Use to alleviate
	 * deprecation warnings.
	 * @deprecated
	 * @since 3.14
	 */
	private static final int JLS9 = AST.JLS9;
	
	/**
	 * The string buffer into which the serialized representation of the AST is
	 * written.
	 */
	protected StringBuffer buffer;

	private int indent = 0;

	/**
	 * Creates a new AST printer.
	 */
	public NaiveASTFlattener() {
		this.buffer = new StringBuffer();
	}

	/**
	 * Internal synonym for {@link ClassInstanceCreation#getName()}. Use to alleviate
	 * deprecation warnings.
	 * @deprecated
	 * @since 3.4
	 */
	private Name getName(ClassInstanceCreation node) {
		return node.getName();
	}

	/**
	 * Returns the string accumulated in the visit.
	 *
	 * @return the serialized
	 */
	public String getResult() {
		return this.buffer.toString();
	}

	/**
	 * Internal synonym for {@link MethodDeclaration#getReturnType()}. Use to alleviate
	 * deprecation warnings.
	 * @deprecated
	 * @since 3.4
	 */
	private static Type getReturnType(MethodDeclaration node) {
		return node.getReturnType();
	}

	/**
	 * Internal synonym for {@link TypeDeclaration#getSuperclass()}. Use to alleviate
	 * deprecation warnings.
	 * @deprecated
	 * @since 3.4
	 */
	private static Name getSuperclass(TypeDeclaration node) {
		return node.getSuperclass();
	}

	/**
	 * Internal synonym for {@link TypeDeclarationStatement#getTypeDeclaration()}. Use to alleviate
	 * deprecation warnings.
	 * @deprecated
	 * @since 3.4
	 */
	private static TypeDeclaration getTypeDeclaration(TypeDeclarationStatement node) {
		return node.getTypeDeclaration();
	}

	/**
	 * Internal synonym for {@link MethodDeclaration#thrownExceptions()}. Use to alleviate
	 * deprecation warnings.
	 * @deprecated
	 * @since 3.10
	 */
	private static List thrownExceptions(MethodDeclaration node) {
		return node.thrownExceptions();
	}

	void printIndent() {
		for (int i = 0; i < this.indent; i++)
			this.buffer.append("  "); //$NON-NLS-1$
	}

	/**
	 * Appends the text representation of the given modifier flags, followed by a single space.
	 * Used for JLS2 modifiers.
	 *
	 * @param modifiers the modifier flags
	 */
	void printModifiers(int modifiers) {
		if (Modifier.isPublic(modifiers)) {
			this.buffer.append("public ");//$NON-NLS-1$
		}
		if (Modifier.isProtected(modifiers)) {
			this.buffer.append("protected ");//$NON-NLS-1$
		}
		if (Modifier.isPrivate(modifiers)) {
			this.buffer.append("private ");//$NON-NLS-1$
		}
		if (Modifier.isStatic(modifiers)) {
			this.buffer.append("static ");//$NON-NLS-1$
		}
		if (Modifier.isAbstract(modifiers)) {
			this.buffer.append("abstract ");//$NON-NLS-1$
		}
		if (Modifier.isFinal(modifiers)) {
			this.buffer.append("final ");//$NON-NLS-1$
		}
		if (Modifier.isSynchronized(modifiers)) {
			this.buffer.append("synchronized ");//$NON-NLS-1$
		}
		if (Modifier.isVolatile(modifiers)) {
			this.buffer.append("volatile ");//$NON-NLS-1$
		}
		if (Modifier.isNative(modifiers)) {
			this.buffer.append("native ");//$NON-NLS-1$
		}
		if (Modifier.isStrictfp(modifiers)) {
			this.buffer.append("strictfp ");//$NON-NLS-1$
		}
		if (Modifier.isTransient(modifiers)) {
			this.buffer.append("transient ");//$NON-NLS-1$
		}
	}

	/**
	 * Appends the text representation of the given modifier flags, followed by a single space.
	 * Used for 3.0 modifiers and annotations.
	 *
	 * @param ext the list of modifier and annotation nodes
	 * (element type: <code>IExtendedModifiers</code>)
	 */
	void printModifiers(List ext) {
		for (Iterator it = ext.iterator(); it.hasNext(); ) {
			ASTNode p = (ASTNode) it.next();
			p.accept(this);
			this.buffer.append(" ");//$NON-NLS-1$
		}
	}

	private void printTypes(List<Type> types, String prefix) {
		if (types.size() > 0) {
			this.buffer.append(" " + prefix + " ");//$NON-NLS-1$ //$NON-NLS-2$
			Type type = types.get(0);
			type.accept(this);
			for (int i = 1, l = types.size(); i < l; ++i) {
				this.buffer.append(","); //$NON-NLS-1$
				type = types.get(0);
				type.accept(this);
			}
		}
	}

	/**
	 * reference node helper function that is common to all
	 * the difference reference nodes.
	 *
	 * @param typeArguments list of type arguments
	 */
	private void visitReferenceTypeArguments(List typeArguments) {
		this.buffer.append("::");//$NON-NLS-1$
		if (!typeArguments.isEmpty()) {
			this.buffer.append('<');
			for (Iterator it = typeArguments.iterator(); it.hasNext(); ) {
				Type t = (Type) it.next();
				t.accept(this);
				if (it.hasNext()) {
					this.buffer.append(',');
				}
			}
			this.buffer.append('>');
		}
	}
	
	private void visitTypeAnnotations(AnnotatableType node) {
		if (node.getAST().apiLevel() >= JLS8) {
			visitAnnotationsList(node.annotations());
		}
	}

	private void visitAnnotationsList(List annotations) {
		for (Iterator it = annotations.iterator(); it.hasNext(); ) {
			Annotation annotation = (Annotation) it.next();
			annotation.accept(this);
			this.buffer.append(' ');
		}
	}
	
	/**
	 * Resets this printer so that it can be used again.
	 */
	public void reset() {
		this.buffer.setLength(0);
	}

	/**
	 * Internal synonym for {@link TypeDeclaration#superInterfaces()}. Use to alleviate
	 * deprecation warnings.
	 * @deprecated
	 * @since 3.4
	 */
	private List superInterfaces(TypeDeclaration node) {
		return node.superInterfaces();
	}

	@Override
	public boolean visit(AnnotationTypeDeclaration node) {
		if (node.getJavadoc() != null) {
			node.getJavadoc().accept(this);
		}
		printIndent();
		printModifiers(node.modifiers());
		this.buffer.append("@interface ");//$NON-NLS-1$
		node.getName().accept(this);
		this.buffer.append(" {");//$NON-NLS-1$
		for (Iterator it = node.bodyDeclarations().iterator(); it.hasNext(); ) {
			BodyDeclaration d = (BodyDeclaration) it.next();
			d.accept(this);
		}
		this.buffer.append("}\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(AnnotationTypeMemberDeclaration node) {
		if (node.getJavadoc() != null) {
			node.getJavadoc().accept(this);
		}
		printIndent();
		printModifiers(node.modifiers());
		node.getType().accept(this);
		this.buffer.append(" ");//$NON-NLS-1$
		node.getName().accept(this);
		this.buffer.append("()");//$NON-NLS-1$
		if (node.getDefault() != null) {
			this.buffer.append(" default ");//$NON-NLS-1$
			node.getDefault().accept(this);
		}
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(AnonymousClassDeclaration node) {
		this.buffer.append("{\n");//$NON-NLS-1$
		this.indent++;
		for (Iterator it = node.bodyDeclarations().iterator(); it.hasNext(); ) {
			BodyDeclaration b = (BodyDeclaration) it.next();
			b.accept(this);
		}
		this.indent--;
		printIndent();
		this.buffer.append("}\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(ArrayAccess node) {
		node.getArray().accept(this);
		this.buffer.append("[");//$NON-NLS-1$
		node.getIndex().accept(this);
		this.buffer.append("]");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(ArrayCreation node) {
		this.buffer.append("new ");//$NON-NLS-1$
		ArrayType at = node.getType();
		int dims = at.getDimensions();
		Type elementType = at.getElementType();
		elementType.accept(this);
		for (Iterator it = node.dimensions().iterator(); it.hasNext(); ) {
			this.buffer.append("[");//$NON-NLS-1$
			Expression e = (Expression) it.next();
			e.accept(this);
			this.buffer.append("]");//$NON-NLS-1$
			dims--;
		}
		// add empty "[]" for each extra array dimension
		for (int i= 0; i < dims; i++) {
			this.buffer.append("[]");//$NON-NLS-1$
		}
		if (node.getInitializer() != null) {
			node.getInitializer().accept(this);
		}
		return false;
	}

	@Override
	public boolean visit(ArrayInitializer node) {
		this.buffer.append("{");//$NON-NLS-1$
		for (Iterator it = node.expressions().iterator(); it.hasNext(); ) {
			Expression e = (Expression) it.next();
			e.accept(this);
			if (it.hasNext()) {
				this.buffer.append(",");//$NON-NLS-1$
			}
		}
		this.buffer.append("}");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(ArrayType node) {
		if (node.getAST().apiLevel() < JLS8) {
			visitComponentType(node);
			this.buffer.append("[]");//$NON-NLS-1$
		} else {
			node.getElementType().accept(this);
			List dimensions = node.dimensions();
			int size = dimensions.size();
			for (int i = 0; i < size; i++) {
				Dimension aDimension = (Dimension) dimensions.get(i);
				aDimension.accept(this);
			}
		}
		return false;
	}

	@Override
	public boolean visit(AssertStatement node) {
		printIndent();
		this.buffer.append("assert ");//$NON-NLS-1$
		node.getExpression().accept(this);
		if (node.getMessage() != null) {
			this.buffer.append(" : ");//$NON-NLS-1$
			node.getMessage().accept(this);
		}
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(Assignment node) {
		node.getLeftHandSide().accept(this);
		this.buffer.append(node.getOperator().toString());
		node.getRightHandSide().accept(this);
		return false;
	}

	@Override
	public boolean visit(Block node) {
		this.buffer.append("{\n");//$NON-NLS-1$
		this.indent++;
		for (Iterator it = node.statements().iterator(); it.hasNext(); ) {
			Statement s = (Statement) it.next();
			s.accept(this);
		}
		this.indent--;
		printIndent();
		this.buffer.append("}\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(BlockComment node) {
		printIndent();
		this.buffer.append("/* */");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(BooleanLiteral node) {
		if (node.booleanValue() == true) {
			this.buffer.append("true");//$NON-NLS-1$
		} else {
			this.buffer.append("false");//$NON-NLS-1$
		}
		return false;
	}

	@Override
	public boolean visit(BreakStatement node) {
		printIndent();
		this.buffer.append("break");//$NON-NLS-1$
		if (node.getLabel() != null) {
			this.buffer.append(" ");//$NON-NLS-1$
			node.getLabel().accept(this);
		}
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(CastExpression node) {
		this.buffer.append("(");//$NON-NLS-1$
		node.getType().accept(this);
		this.buffer.append(")");//$NON-NLS-1$
		node.getExpression().accept(this);
		return false;
	}

	@Override
	public boolean visit(CatchClause node) {
		this.buffer.append("catch (");//$NON-NLS-1$
		node.getException().accept(this);
		this.buffer.append(") ");//$NON-NLS-1$
		node.getBody().accept(this);
		return false;
	}

	@Override
	public boolean visit(CharacterLiteral node) {
		this.buffer.append(node.getEscapedValue());
		return false;
	}

	@Override
	public boolean visit(ClassInstanceCreation node) {
		if (node.getExpression() != null) {
			node.getExpression().accept(this);
			this.buffer.append(".");//$NON-NLS-1$
		}
		this.buffer.append("new ");//$NON-NLS-1$
		if (node.getAST().apiLevel() == JLS2) {
			getName(node).accept(this);
		}
		if (node.getAST().apiLevel() >= JLS3) {
			if (!node.typeArguments().isEmpty()) {
				this.buffer.append("<");//$NON-NLS-1$
				for (Iterator it = node.typeArguments().iterator(); it.hasNext(); ) {
					Type t = (Type) it.next();
					t.accept(this);
					if (it.hasNext()) {
						this.buffer.append(",");//$NON-NLS-1$
					}
				}
				this.buffer.append(">");//$NON-NLS-1$
			}
			node.getType().accept(this);
		}
		this.buffer.append("(");//$NON-NLS-1$
		for (Iterator it = node.arguments().iterator(); it.hasNext(); ) {
			Expression e = (Expression) it.next();
			e.accept(this);
			if (it.hasNext()) {
				this.buffer.append(",");//$NON-NLS-1$
			}
		}
		this.buffer.append(")");//$NON-NLS-1$
		if (node.getAnonymousClassDeclaration() != null) {
			node.getAnonymousClassDeclaration().accept(this);
		}
		return false;
	}

	@Override
	public boolean visit(CompilationUnit node) {
		if (node.getAST().apiLevel() >= JLS9) {
			if (node.getModule() != null) {
				node.getModule().accept(this);
			}
		}
		if (node.getPackage() != null) {
			node.getPackage().accept(this);
		}
		for (Iterator it = node.imports().iterator(); it.hasNext(); ) {
			ImportDeclaration d = (ImportDeclaration) it.next();
			d.accept(this);
		}
		for (Iterator it = node.types().iterator(); it.hasNext(); ) {
			AbstractTypeDeclaration d = (AbstractTypeDeclaration) it.next();
			d.accept(this);
		}
		return false;
	}

	@Override
	public boolean visit(ConditionalExpression node) {
		node.getExpression().accept(this);
		this.buffer.append(" ? ");//$NON-NLS-1$
		node.getThenExpression().accept(this);
		this.buffer.append(" : ");//$NON-NLS-1$
		node.getElseExpression().accept(this);
		return false;
	}

	@Override
	public boolean visit(ConstructorInvocation node) {
		printIndent();
		if (node.getAST().apiLevel() >= JLS3) {
			if (!node.typeArguments().isEmpty()) {
				this.buffer.append("<");//$NON-NLS-1$
				for (Iterator it = node.typeArguments().iterator(); it.hasNext(); ) {
					Type t = (Type) it.next();
					t.accept(this);
					if (it.hasNext()) {
						this.buffer.append(",");//$NON-NLS-1$
					}
				}
				this.buffer.append(">");//$NON-NLS-1$
			}
		}
		this.buffer.append("this(");//$NON-NLS-1$
		for (Iterator it = node.arguments().iterator(); it.hasNext(); ) {
			Expression e = (Expression) it.next();
			e.accept(this);
			if (it.hasNext()) {
				this.buffer.append(",");//$NON-NLS-1$
			}
		}
		this.buffer.append(");\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(ContinueStatement node) {
		printIndent();
		this.buffer.append("continue");//$NON-NLS-1$
		if (node.getLabel() != null) {
			this.buffer.append(" ");//$NON-NLS-1$
			node.getLabel().accept(this);
		}
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}
	
	@Override
	public boolean visit(CreationReference node) {
		node.getType().accept(this);
		visitReferenceTypeArguments(node.typeArguments());
		this.buffer.append("new");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(Dimension node) {
		List annotations = node.annotations();
		if (annotations.size() > 0)
			this.buffer.append(' ');
		visitAnnotationsList(annotations);
		this.buffer.append("[]"); //$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(DoStatement node) {
		printIndent();
		this.buffer.append("do ");//$NON-NLS-1$
		node.getBody().accept(this);
		this.buffer.append(" while (");//$NON-NLS-1$
		node.getExpression().accept(this);
		this.buffer.append(");\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(EmptyStatement node) {
		printIndent();
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(EnhancedForStatement node) {
		printIndent();
		this.buffer.append("for (");//$NON-NLS-1$
		node.getParameter().accept(this);
		this.buffer.append(" : ");//$NON-NLS-1$
		node.getExpression().accept(this);
		this.buffer.append(") ");//$NON-NLS-1$
		node.getBody().accept(this);
		return false;
	}

	@Override
	public boolean visit(EnumConstantDeclaration node) {
		if (node.getJavadoc() != null) {
			node.getJavadoc().accept(this);
		}
		printIndent();
		printModifiers(node.modifiers());
		node.getName().accept(this);
		if (!node.arguments().isEmpty()) {
			this.buffer.append("(");//$NON-NLS-1$
			for (Iterator it = node.arguments().iterator(); it.hasNext(); ) {
				Expression e = (Expression) it.next();
				e.accept(this);
				if (it.hasNext()) {
					this.buffer.append(",");//$NON-NLS-1$
				}
			}
			this.buffer.append(")");//$NON-NLS-1$
		}
		if (node.getAnonymousClassDeclaration() != null) {
			node.getAnonymousClassDeclaration().accept(this);
		}
		return false;
	}

	@Override
	public boolean visit(EnumDeclaration node) {
		if (node.getJavadoc() != null) {
			node.getJavadoc().accept(this);
		}
		printIndent();
		printModifiers(node.modifiers());
		this.buffer.append("enum ");//$NON-NLS-1$
		node.getName().accept(this);
		this.buffer.append(" ");//$NON-NLS-1$
		if (!node.superInterfaceTypes().isEmpty()) {
			this.buffer.append("implements ");//$NON-NLS-1$
			for (Iterator it = node.superInterfaceTypes().iterator(); it.hasNext(); ) {
				Type t = (Type) it.next();
				t.accept(this);
				if (it.hasNext()) {
					this.buffer.append(", ");//$NON-NLS-1$
				}
			}
			this.buffer.append(" ");//$NON-NLS-1$
		}
		this.buffer.append("{");//$NON-NLS-1$
		for (Iterator it = node.enumConstants().iterator(); it.hasNext(); ) {
			EnumConstantDeclaration d = (EnumConstantDeclaration) it.next();
			d.accept(this);
			// enum constant declarations do not include punctuation
			if (it.hasNext()) {
				// enum constant declarations are separated by commas
				this.buffer.append(", ");//$NON-NLS-1$
			}
		}
		if (!node.bodyDeclarations().isEmpty()) {
			this.buffer.append("; ");//$NON-NLS-1$
			for (Iterator it = node.bodyDeclarations().iterator(); it.hasNext(); ) {
				BodyDeclaration d = (BodyDeclaration) it.next();
				d.accept(this);
				// other body declarations include trailing punctuation
			}
		}
		this.buffer.append("}\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(ExportsDirective node) {
		return visit(node, "exports"); //$NON-NLS-1$
	}

	@Override
	public boolean visit(ExpressionMethodReference node) {
		node.getExpression().accept(this);
		visitReferenceTypeArguments(node.typeArguments());
		node.getName().accept(this);
		return false;
	}

	@Override
	public boolean visit(ExpressionStatement node) {
		printIndent();
		node.getExpression().accept(this);
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(FieldAccess node) {
		node.getExpression().accept(this);
		this.buffer.append(".");//$NON-NLS-1$
		node.getName().accept(this);
		return false;
	}

	@Override
	public boolean visit(FieldDeclaration node) {
		if (node.getJavadoc() != null) {
			node.getJavadoc().accept(this);
		}
		printIndent();
		if (node.getAST().apiLevel() == JLS2) {
			printModifiers(node.getModifiers());
		}
		if (node.getAST().apiLevel() >= JLS3) {
			printModifiers(node.modifiers());
		}
		node.getType().accept(this);
		this.buffer.append(" ");//$NON-NLS-1$
		for (Iterator it = node.fragments().iterator(); it.hasNext(); ) {
			VariableDeclarationFragment f = (VariableDeclarationFragment) it.next();
			f.accept(this);
			if (it.hasNext()) {
				this.buffer.append(", ");//$NON-NLS-1$
			}
		}
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(ForStatement node) {
		printIndent();
		this.buffer.append("for (");//$NON-NLS-1$
		for (Iterator it = node.initializers().iterator(); it.hasNext(); ) {
			Expression e = (Expression) it.next();
			e.accept(this);
			if (it.hasNext()) this.buffer.append(", ");//$NON-NLS-1$
		}
		this.buffer.append("; ");//$NON-NLS-1$
		if (node.getExpression() != null) {
			node.getExpression().accept(this);
		}
		this.buffer.append("; ");//$NON-NLS-1$
		for (Iterator it = node.updaters().iterator(); it.hasNext(); ) {
			Expression e = (Expression) it.next();
			e.accept(this);
			if (it.hasNext()) this.buffer.append(", ");//$NON-NLS-1$
		}
		this.buffer.append(") ");//$NON-NLS-1$
		node.getBody().accept(this);
		return false;
	}

	@Override
	public boolean visit(IfStatement node) {
		printIndent();
		this.buffer.append("if (");//$NON-NLS-1$
		node.getExpression().accept(this);
		this.buffer.append(") ");//$NON-NLS-1$
		node.getThenStatement().accept(this);
		if (node.getElseStatement() != null) {
			this.buffer.append(" else ");//$NON-NLS-1$
			node.getElseStatement().accept(this);
		}
		return false;
	}

	@Override
	public boolean visit(ImportDeclaration node) {
		printIndent();
		this.buffer.append("import ");//$NON-NLS-1$
		if (node.getAST().apiLevel() >= JLS3) {
			if (node.isStatic()) {
				this.buffer.append("static ");//$NON-NLS-1$
			}
		}
		node.getName().accept(this);
		if (node.isOnDemand()) {
			this.buffer.append(".*");//$NON-NLS-1$
		}
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(InfixExpression node) {
		node.getLeftOperand().accept(this);
		this.buffer.append(' ');  // for cases like x= i - -1; or x= i++ + ++i;
		this.buffer.append(node.getOperator().toString());
		this.buffer.append(' ');
		node.getRightOperand().accept(this);
		final List extendedOperands = node.extendedOperands();
		if (extendedOperands.size() != 0) {
			this.buffer.append(' ');
			for (Iterator it = extendedOperands.iterator(); it.hasNext(); ) {
				this.buffer.append(node.getOperator().toString()).append(' ');
				Expression e = (Expression) it.next();
				e.accept(this);
			}
		}
		return false;
	}

	@Override
	public boolean visit(Initializer node) {
		if (node.getJavadoc() != null) {
			node.getJavadoc().accept(this);
		}
		if (node.getAST().apiLevel() == JLS2) {
			printModifiers(node.getModifiers());
		}
		if (node.getAST().apiLevel() >= JLS3) {
			printModifiers(node.modifiers());
		}
		node.getBody().accept(this);
		return false;
	}

	@Override
	public boolean visit(InstanceofExpression node) {
		node.getLeftOperand().accept(this);
		this.buffer.append(" instanceof ");//$NON-NLS-1$
		node.getRightOperand().accept(this);
		return false;
	}

	@Override
	public boolean visit(IntersectionType node) {
		for (Iterator it = node.types().iterator(); it.hasNext(); ) {
			Type t = (Type) it.next();
			t.accept(this);
			if (it.hasNext()) {
				this.buffer.append(" & "); //$NON-NLS-1$
			}
		}
		return false;
	}

	@Override
	public boolean visit(Javadoc node) {
		printIndent();
		this.buffer.append("/** ");//$NON-NLS-1$
		for (Iterator it = node.tags().iterator(); it.hasNext(); ) {
			ASTNode e = (ASTNode) it.next();
			e.accept(this);
		}
		this.buffer.append("\n */\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(LabeledStatement node) {
		printIndent();
		node.getLabel().accept(this);
		this.buffer.append(": ");//$NON-NLS-1$
		node.getBody().accept(this);
		return false;
	}

	@Override
	public boolean visit(LambdaExpression node) {
		boolean hasParentheses = node.hasParentheses();
		if (hasParentheses)
			this.buffer.append('(');
		for (Iterator it = node.parameters().iterator(); it.hasNext(); ) {
			VariableDeclaration v = (VariableDeclaration) it.next();
			v.accept(this);
			if (it.hasNext()) {
				this.buffer.append(",");//$NON-NLS-1$
			}
		}
		if (hasParentheses)
			this.buffer.append(')');
		this.buffer.append(" -> "); //$NON-NLS-1$
		node.getBody().accept(this);
		return false;
	}

	@Override
	public boolean visit(LineComment node) {
		this.buffer.append("//\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(MarkerAnnotation node) {
		this.buffer.append("@");//$NON-NLS-1$
		node.getTypeName().accept(this);
		return false;
	}

	@Override
	public boolean visit(MemberRef node) {
		if (node.getQualifier() != null) {
			node.getQualifier().accept(this);
		}
		this.buffer.append("#");//$NON-NLS-1$
		node.getName().accept(this);
		return false;
	}

	@Override
	public boolean visit(MemberValuePair node) {
		node.getName().accept(this);
		this.buffer.append("=");//$NON-NLS-1$
		node.getValue().accept(this);
		return false;
	}

	@Override
	public boolean visit(MethodDeclaration node) {
		if (node.getJavadoc() != null) {
			node.getJavadoc().accept(this);
		}
		printIndent();
		if (node.getAST().apiLevel() == JLS2) {
			printModifiers(node.getModifiers());
		}
		if (node.getAST().apiLevel() >= JLS3) {
			printModifiers(node.modifiers());
			if (!node.typeParameters().isEmpty()) {
				this.buffer.append("<");//$NON-NLS-1$
				for (Iterator it = node.typeParameters().iterator(); it.hasNext(); ) {
					TypeParameter t = (TypeParameter) it.next();
					t.accept(this);
					if (it.hasNext()) {
						this.buffer.append(",");//$NON-NLS-1$
					}
				}
				this.buffer.append(">");//$NON-NLS-1$
			}
		}
		if (!node.isConstructor()) {
			if (node.getAST().apiLevel() == JLS2) {
				getReturnType(node).accept(this);
			} else {
				if (node.getReturnType2() != null) {
					node.getReturnType2().accept(this);
				} else {
					// methods really ought to have a return type
					this.buffer.append("void");//$NON-NLS-1$
				}
			}
			this.buffer.append(" ");//$NON-NLS-1$
		}
		node.getName().accept(this);
		this.buffer.append("(");//$NON-NLS-1$
		if (node.getAST().apiLevel() >= JLS8) {
			Type receiverType = node.getReceiverType();
			if (receiverType != null) {
				receiverType.accept(this);
				this.buffer.append(' ');
				SimpleName qualifier = node.getReceiverQualifier();
				if (qualifier != null) {
					qualifier.accept(this);
					this.buffer.append('.');
				}
				this.buffer.append("this"); //$NON-NLS-1$
				if (node.parameters().size() > 0) {
					this.buffer.append(',');
				}
			}
		}
		for (Iterator it = node.parameters().iterator(); it.hasNext(); ) {
			SingleVariableDeclaration v = (SingleVariableDeclaration) it.next();
			v.accept(this);
			if (it.hasNext()) {
				this.buffer.append(",");//$NON-NLS-1$
			}
		}
		this.buffer.append(")");//$NON-NLS-1$
		int size = node.getExtraDimensions();
		if (node.getAST().apiLevel() >= JLS8) {
			List dimensions = node.extraDimensions();
			for (int i = 0; i < size; i++) {
				visit((Dimension) dimensions.get(i));
			}
		} else {
			for (int i = 0; i < size; i++) {
				this.buffer.append("[]"); //$NON-NLS-1$
			}
		}
		if (node.getAST().apiLevel() < JLS8) {
			if (!thrownExceptions(node).isEmpty()) {
				this.buffer.append(" throws ");//$NON-NLS-1$
				for (Iterator it = thrownExceptions(node).iterator(); it.hasNext(); ) {
					Name n = (Name) it.next();
					n.accept(this);
					if (it.hasNext()) {
						this.buffer.append(", ");//$NON-NLS-1$
					}
				}				
				this.buffer.append(" ");//$NON-NLS-1$
			} 
		} else {
			if (!node.thrownExceptionTypes().isEmpty()) {				
				this.buffer.append(" throws ");//$NON-NLS-1$
				for (Iterator it = node.thrownExceptionTypes().iterator(); it.hasNext(); ) {
					Type n = (Type) it.next();
					n.accept(this);
					if (it.hasNext()) {
						this.buffer.append(", ");//$NON-NLS-1$
					}
				}	
				this.buffer.append(" ");//$NON-NLS-1$				
			}
		}
		if (node.getBody() == null) {
			this.buffer.append(";\n");//$NON-NLS-1$
		} else {
			node.getBody().accept(this);
		}
		return false;
	}

	@Override
	public boolean visit(MethodInvocation node) {
		if (node.getExpression() != null) {
			node.getExpression().accept(this);
			this.buffer.append(".");//$NON-NLS-1$
		}
		if (node.getAST().apiLevel() >= JLS3) {
			if (!node.typeArguments().isEmpty()) {
				this.buffer.append("<");//$NON-NLS-1$
				for (Iterator it = node.typeArguments().iterator(); it.hasNext(); ) {
					Type t = (Type) it.next();
					t.accept(this);
					if (it.hasNext()) {
						this.buffer.append(",");//$NON-NLS-1$
					}
				}
				this.buffer.append(">");//$NON-NLS-1$
			}
		}
		node.getName().accept(this);
		this.buffer.append("(");//$NON-NLS-1$
		for (Iterator it = node.arguments().iterator(); it.hasNext(); ) {
			Expression e = (Expression) it.next();
			e.accept(this);
			if (it.hasNext()) {
				this.buffer.append(",");//$NON-NLS-1$
			}
		}
		this.buffer.append(")");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(MethodRef node) {
		if (node.getQualifier() != null) {
			node.getQualifier().accept(this);
		}
		this.buffer.append("#");//$NON-NLS-1$
		node.getName().accept(this);
		this.buffer.append("(");//$NON-NLS-1$
		for (Iterator it = node.parameters().iterator(); it.hasNext(); ) {
			MethodRefParameter e = (MethodRefParameter) it.next();
			e.accept(this);
			if (it.hasNext()) {
				this.buffer.append(",");//$NON-NLS-1$
			}
		}
		this.buffer.append(")");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(MethodRefParameter node) {
		node.getType().accept(this);
		if (node.getAST().apiLevel() >= JLS3) {
			if (node.isVarargs()) {
				this.buffer.append("...");//$NON-NLS-1$
			}
		}
		if (node.getName() != null) {
			this.buffer.append(" ");//$NON-NLS-1$
			node.getName().accept(this);
		}
		return false;
	}

	@Override
	public boolean visit(Modifier node) {
		this.buffer.append(node.getKeyword().toString());
		return false;
	}

	@Override
	public boolean visit(ModuleDeclaration node) {
		if (node.getJavadoc() != null) {
			node.getJavadoc().accept(this);
		}
		printModifiers(node.annotations());
		if (node.isOpen())
			this.buffer.append("open "); //$NON-NLS-1$
		this.buffer.append("module"); //$NON-NLS-1$
		this.buffer.append(" "); //$NON-NLS-1$
		node.getName().accept(this);
		this.buffer.append(" {\n"); //$NON-NLS-1$
		this.indent++;
		for (ModuleDirective stmt : (List<ModuleDirective>)node.moduleStatements()) {
			stmt.accept(this);
		}
		this.indent--;
		this.buffer.append("}"); //$NON-NLS-1$
		return false;
	}

	@Override
	/*
	 * @see ASTVisitor#visit(ModuleModifier)
	 * @since 3.14
	 */
	public boolean visit(ModuleModifier node) {
		this.buffer.append(node.getKeyword().toString());
		return false;
	}

	private boolean visit(ModulePackageAccess node, String keyword) {
		printIndent();
		this.buffer.append(keyword);
		this.buffer.append(" ");//$NON-NLS-1$
		node.getName().accept(this);
		printTypes(node.modules(), "to"); //$NON-NLS-1$
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(NameQualifiedType node) {
		node.getQualifier().accept(this);
		this.buffer.append('.');
		visitTypeAnnotations(node);
		node.getName().accept(this);
		return false;
	}

	@Override
	public boolean visit(NormalAnnotation node) {
		this.buffer.append("@");//$NON-NLS-1$
		node.getTypeName().accept(this);
		this.buffer.append("(");//$NON-NLS-1$
		for (Iterator it = node.values().iterator(); it.hasNext(); ) {
			MemberValuePair p = (MemberValuePair) it.next();
			p.accept(this);
			if (it.hasNext()) {
				this.buffer.append(",");//$NON-NLS-1$
			}
		}
		this.buffer.append(")");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(NullLiteral node) {
		this.buffer.append("null");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(NumberLiteral node) {
		this.buffer.append(node.getToken());
		return false;
	}

	@Override
	public boolean visit(OpensDirective node) {
		return visit(node, "opens"); //$NON-NLS-1$
	}

	@Override
	public boolean visit(PackageDeclaration node) {
		if (node.getAST().apiLevel() >= JLS3) {
			if (node.getJavadoc() != null) {
				node.getJavadoc().accept(this);
			}
			for (Iterator it = node.annotations().iterator(); it.hasNext(); ) {
				Annotation p = (Annotation) it.next();
				p.accept(this);
				this.buffer.append(" ");//$NON-NLS-1$
			}
		}
		printIndent();
		this.buffer.append("package ");//$NON-NLS-1$
		node.getName().accept(this);
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(ParameterizedType node) {
		node.getType().accept(this);
		this.buffer.append("<");//$NON-NLS-1$
		for (Iterator it = node.typeArguments().iterator(); it.hasNext(); ) {
			Type t = (Type) it.next();
			t.accept(this);
			if (it.hasNext()) {
				this.buffer.append(",");//$NON-NLS-1$
			}
		}
		this.buffer.append(">");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(ParenthesizedExpression node) {
		this.buffer.append("(");//$NON-NLS-1$
		node.getExpression().accept(this);
		this.buffer.append(")");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(PostfixExpression node) {
		node.getOperand().accept(this);
		this.buffer.append(node.getOperator().toString());
		return false;
	}

	@Override
	public boolean visit(PrefixExpression node) {
		this.buffer.append(node.getOperator().toString());
		node.getOperand().accept(this);
		return false;
	}

	@Override
	public boolean visit(PrimitiveType node) {
		visitTypeAnnotations(node);
		this.buffer.append(node.getPrimitiveTypeCode().toString());
		return false;
	}

	@Override
	public boolean visit(ProvidesDirective node) {
		printIndent();
		this.buffer.append("provides");//$NON-NLS-1$
		this.buffer.append(" ");//$NON-NLS-1$
		node.getName().accept(this);
		printTypes(node.implementations(), "with"); //$NON-NLS-1$
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(QualifiedName node) {
		node.getQualifier().accept(this);
		this.buffer.append(".");//$NON-NLS-1$
		node.getName().accept(this);
		return false;
	}

	@Override
	public boolean visit(QualifiedType node) {
		node.getQualifier().accept(this);
		this.buffer.append(".");//$NON-NLS-1$
		visitTypeAnnotations(node);
		node.getName().accept(this);
		return false;
	}

	@Override
	public boolean visit(RequiresDirective node) {
		printIndent();
		this.buffer.append("requires");//$NON-NLS-1$
		this.buffer.append(" ");//$NON-NLS-1$
		printModifiers(node.modifiers());
		node.getName().accept(this);
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(ReturnStatement node) {
		printIndent();
		this.buffer.append("return");//$NON-NLS-1$
		if (node.getExpression() != null) {
			this.buffer.append(" ");//$NON-NLS-1$
			node.getExpression().accept(this);
		}
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(SimpleName node) {
		this.buffer.append(node.getIdentifier());
		return false;
	}

	@Override
	public boolean visit(SimpleType node) {
		visitTypeAnnotations(node);
		node.getName().accept(this);
		return false;
	}

	@Override
	public boolean visit(SingleMemberAnnotation node) {
		this.buffer.append("@");//$NON-NLS-1$
		node.getTypeName().accept(this);
		this.buffer.append("(");//$NON-NLS-1$
		node.getValue().accept(this);
		this.buffer.append(")");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(SingleVariableDeclaration node) {
		printIndent();
		if (node.getAST().apiLevel() == JLS2) {
			printModifiers(node.getModifiers());
		}
		if (node.getAST().apiLevel() >= JLS3) {
			printModifiers(node.modifiers());
		}
		node.getType().accept(this);
		if (node.getAST().apiLevel() >= JLS3) {
			if (node.isVarargs()) {
				if (node.getAST().apiLevel() >= JLS8) {
					List annotations = node.varargsAnnotations();
					if (annotations.size() > 0) {
						this.buffer.append(' ');
					}
					visitAnnotationsList(annotations);
				}
				this.buffer.append("...");//$NON-NLS-1$
			}
		}
		this.buffer.append(" ");//$NON-NLS-1$
		node.getName().accept(this);
		int size = node.getExtraDimensions();
		if (node.getAST().apiLevel() >= JLS8) {
			List dimensions = node.extraDimensions();
			for (int i = 0; i < size; i++) {
				visit((Dimension) dimensions.get(i));
			}
		} else {
			for (int i = 0; i < size; i++) {
				this.buffer.append("[]"); //$NON-NLS-1$
			}
		}
		if (node.getInitializer() != null) {
			this.buffer.append("=");//$NON-NLS-1$
			node.getInitializer().accept(this);
		}
		return false;
	}

	@Override
	public boolean visit(StringLiteral node) {
		this.buffer.append(node.getEscapedValue());
		return false;
	}

	@Override
	public boolean visit(SuperConstructorInvocation node) {
		printIndent();
		if (node.getExpression() != null) {
			node.getExpression().accept(this);
			this.buffer.append(".");//$NON-NLS-1$
		}
		if (node.getAST().apiLevel() >= JLS3) {
			if (!node.typeArguments().isEmpty()) {
				this.buffer.append("<");//$NON-NLS-1$
				for (Iterator it = node.typeArguments().iterator(); it.hasNext(); ) {
					Type t = (Type) it.next();
					t.accept(this);
					if (it.hasNext()) {
						this.buffer.append(",");//$NON-NLS-1$
					}
				}
				this.buffer.append(">");//$NON-NLS-1$
			}
		}
		this.buffer.append("super(");//$NON-NLS-1$
		for (Iterator it = node.arguments().iterator(); it.hasNext(); ) {
			Expression e = (Expression) it.next();
			e.accept(this);
			if (it.hasNext()) {
				this.buffer.append(",");//$NON-NLS-1$
			}
		}
		this.buffer.append(");\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(SuperFieldAccess node) {
		if (node.getQualifier() != null) {
			node.getQualifier().accept(this);
			this.buffer.append(".");//$NON-NLS-1$
		}
		this.buffer.append("super.");//$NON-NLS-1$
		node.getName().accept(this);
		return false;
	}

	@Override
	public boolean visit(SuperMethodInvocation node) {
		if (node.getQualifier() != null) {
			node.getQualifier().accept(this);
			this.buffer.append(".");//$NON-NLS-1$
		}
		this.buffer.append("super.");//$NON-NLS-1$
		if (node.getAST().apiLevel() >= JLS3) {
			if (!node.typeArguments().isEmpty()) {
				this.buffer.append("<");//$NON-NLS-1$
				for (Iterator it = node.typeArguments().iterator(); it.hasNext(); ) {
					Type t = (Type) it.next();
					t.accept(this);
					if (it.hasNext()) {
						this.buffer.append(",");//$NON-NLS-1$
					}
				}
				this.buffer.append(">");//$NON-NLS-1$
			}
		}
		node.getName().accept(this);
		this.buffer.append("(");//$NON-NLS-1$
		for (Iterator it = node.arguments().iterator(); it.hasNext(); ) {
			Expression e = (Expression) it.next();
			e.accept(this);
			if (it.hasNext()) {
				this.buffer.append(",");//$NON-NLS-1$
			}
		}
		this.buffer.append(")");//$NON-NLS-1$
		return false;
	}

	/*
	 * @see ASTVisitor#visit(SuperMethodReference)
	 * 
	 * @since 3.10
	 */
	@Override
	public boolean visit(SuperMethodReference node) {
		if (node.getQualifier() != null) {
			node.getQualifier().accept(this);
			this.buffer.append('.');
		}
		this.buffer.append("super");//$NON-NLS-1$
		visitReferenceTypeArguments(node.typeArguments());
		node.getName().accept(this);
		return false;
	}

	@Override
	public boolean visit(SwitchCase node) {
		if ((node.getAST().isPreviewEnabled())) {
			if (node.isDefault()) {
				this.buffer.append("default");//$NON-NLS-1$
				this.buffer.append(node.isSwitchLabeledRule() ? " ->" : ":");//$NON-NLS-1$ //$NON-NLS-2$
			} else {
				this.buffer.append("case ");//$NON-NLS-1$
				for (Iterator it = node.expressions().iterator(); it.hasNext(); ) {
					Expression t = (Expression) it.next();
						t.accept(this);
						this.buffer.append(it.hasNext() ? ", " : //$NON-NLS-1$
							node.isSwitchLabeledRule() ? " ->" : ":");//$NON-NLS-1$ //$NON-NLS-2$
				}
			}
		}
		else {
			if (node.isDefault()) {
				this.buffer.append("default :\n");//$NON-NLS-1$
			} else {
				this.buffer.append("case ");//$NON-NLS-1$
				getSwitchExpression(node).accept(this);
				this.buffer.append(":\n");//$NON-NLS-1$
			}
		}
		this.indent++; //decremented in visit(SwitchStatement)
		return false;
	}
	/**
	 * @deprecated
	 */
	private Expression getSwitchExpression(SwitchCase node) {
		return node.getExpression();
	}

	private void visitSwitchNode(ASTNode node) {
		this.buffer.append("switch (");//$NON-NLS-1$
		if (node instanceof SwitchExpression) {
			((SwitchExpression)node).getExpression().accept(this);
		} else if (node instanceof SwitchStatement) {
			((SwitchStatement)node).getExpression().accept(this);
		}
		this.buffer.append(") ");//$NON-NLS-1$
		this.buffer.append("{\n");//$NON-NLS-1$
		this.indent++;
		if (node instanceof SwitchExpression) {
			for (Iterator it = ((SwitchExpression)node).statements().iterator(); it.hasNext(); ) {
				Statement s = (Statement) it.next();
				s.accept(this);
				this.indent--; // incremented in visit(SwitchCase)
			}
		} else if (node instanceof SwitchStatement) {
			for (Iterator it = ((SwitchStatement)node).statements().iterator(); it.hasNext(); ) {
				Statement s = (Statement) it.next();
				s.accept(this);
				this.indent--; // incremented in visit(SwitchCase)
			}
		}
		this.indent--;
		printIndent();
		this.buffer.append("}\n");//$NON-NLS-1$
			
	}
	@Override
	public boolean visit(SwitchExpression node) {
		visitSwitchNode(node);
		return false;
	}
	
	@Override
	public boolean visit(SwitchStatement node) {
		visitSwitchNode(node);
		return false;
	}

	@Override
	public boolean visit(SynchronizedStatement node) {
		this.buffer.append("synchronized (");//$NON-NLS-1$
		node.getExpression().accept(this);
		this.buffer.append(") ");//$NON-NLS-1$
		node.getBody().accept(this);
		return false;
	}

	@Override
	public boolean visit(TagElement node) {
		if (node.isNested()) {
			// nested tags are always enclosed in braces
			this.buffer.append("{");//$NON-NLS-1$
		} else {
			// top-level tags always begin on a new line
			this.buffer.append("\n * ");//$NON-NLS-1$
		}
		boolean previousRequiresWhiteSpace = false;
		if (node.getTagName() != null) {
			this.buffer.append(node.getTagName());
			previousRequiresWhiteSpace = true;
		}
		boolean previousRequiresNewLine = false;
		for (Iterator it = node.fragments().iterator(); it.hasNext(); ) {
			ASTNode e = (ASTNode) it.next();
			// Name, MemberRef, MethodRef, and nested TagElement do not include white space.
			// TextElements don't always include whitespace, see <https://bugs.eclipse.org/206518>.
			boolean currentIncludesWhiteSpace = false;
			if (e instanceof TextElement) {
				String text = ((TextElement) e).getText();
				if (text.length() > 0 && ScannerHelper.isWhitespace(text.charAt(0))) {
					currentIncludesWhiteSpace = true; // workaround for https://bugs.eclipse.org/403735
				}
			}
			if (previousRequiresNewLine && currentIncludesWhiteSpace) {
				this.buffer.append("\n * ");//$NON-NLS-1$
			}
			previousRequiresNewLine = currentIncludesWhiteSpace;
			// add space if required to separate
			if (previousRequiresWhiteSpace && !currentIncludesWhiteSpace) {
				this.buffer.append(" "); //$NON-NLS-1$
			}
			e.accept(this);
			previousRequiresWhiteSpace = !currentIncludesWhiteSpace && !(e instanceof TagElement);
		}
		if (node.isNested()) {
			this.buffer.append("}");//$NON-NLS-1$
		}
		return false;
	}

	@Override
	public boolean visit(TextBlock node) {
		this.buffer.append(node.getEscapedValue());
		return false;
	}
	
	@Override
	public boolean visit(TextElement node) {
		this.buffer.append(node.getText());
		return false;
	}

	@Override
	public boolean visit(ThisExpression node) {
		if (node.getQualifier() != null) {
			node.getQualifier().accept(this);
			this.buffer.append(".");//$NON-NLS-1$
		}
		this.buffer.append("this");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(ThrowStatement node) {
		printIndent();
		this.buffer.append("throw ");//$NON-NLS-1$
		node.getExpression().accept(this);
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(TryStatement node) {
		printIndent();
		this.buffer.append("try ");//$NON-NLS-1$
		if (node.getAST().apiLevel() >= JLS4) {
			List resources = node.resources();
			if (!resources.isEmpty()) {
				this.buffer.append('(');
				for (Iterator it = resources.iterator(); it.hasNext(); ) {
					Expression variable = (Expression) it.next();
					variable.accept(this);
					if (it.hasNext()) {
						this.buffer.append(';');
					}
				}
				this.buffer.append(')');
			}
		}
		node.getBody().accept(this);
		this.buffer.append(" ");//$NON-NLS-1$
		for (Iterator it = node.catchClauses().iterator(); it.hasNext(); ) {
			CatchClause cc = (CatchClause) it.next();
			cc.accept(this);
		}
		if (node.getFinally() != null) {
			this.buffer.append(" finally ");//$NON-NLS-1$
			node.getFinally().accept(this);
		}
		return false;
	}

	@Override
	public boolean visit(TypeDeclaration node) {
		if (node.getJavadoc() != null) {
			node.getJavadoc().accept(this);
		}
		if (node.getAST().apiLevel() == JLS2) {
			printModifiers(node.getModifiers());
		}
		if (node.getAST().apiLevel() >= JLS3) {
			printModifiers(node.modifiers());
		}
		this.buffer.append(node.isInterface() ? "interface " : "class ");//$NON-NLS-2$//$NON-NLS-1$
		node.getName().accept(this);
		if (node.getAST().apiLevel() >= JLS3) {
			if (!node.typeParameters().isEmpty()) {
				this.buffer.append("<");//$NON-NLS-1$
				for (Iterator it = node.typeParameters().iterator(); it.hasNext(); ) {
					TypeParameter t = (TypeParameter) it.next();
					t.accept(this);
					if (it.hasNext()) {
						this.buffer.append(",");//$NON-NLS-1$
					}
				}
				this.buffer.append(">");//$NON-NLS-1$
			}
		}
		this.buffer.append(" ");//$NON-NLS-1$
		if (node.getAST().apiLevel() == JLS2) {
			if (getSuperclass(node) != null) {
				this.buffer.append("extends ");//$NON-NLS-1$
				getSuperclass(node).accept(this);
				this.buffer.append(" ");//$NON-NLS-1$
			}
			if (!superInterfaces(node).isEmpty()) {
				this.buffer.append(node.isInterface() ? "extends " : "implements ");//$NON-NLS-2$//$NON-NLS-1$
				for (Iterator it = superInterfaces(node).iterator(); it.hasNext(); ) {
					Name n = (Name) it.next();
					n.accept(this);
					if (it.hasNext()) {
						this.buffer.append(", ");//$NON-NLS-1$
					}
				}
				this.buffer.append(" ");//$NON-NLS-1$
			}
		}
		if (node.getAST().apiLevel() >= JLS3) {
			if (node.getSuperclassType() != null) {
				this.buffer.append("extends ");//$NON-NLS-1$
				node.getSuperclassType().accept(this);
				this.buffer.append(" ");//$NON-NLS-1$
			}
			if (!node.superInterfaceTypes().isEmpty()) {
				this.buffer.append(node.isInterface() ? "extends " : "implements ");//$NON-NLS-2$//$NON-NLS-1$
				for (Iterator it = node.superInterfaceTypes().iterator(); it.hasNext(); ) {
					Type t = (Type) it.next();
					t.accept(this);
					if (it.hasNext()) {
						this.buffer.append(", ");//$NON-NLS-1$
					}
				}
				this.buffer.append(" ");//$NON-NLS-1$
			}
		}
		this.buffer.append("{\n");//$NON-NLS-1$
		this.indent++;
		for (Iterator it = node.bodyDeclarations().iterator(); it.hasNext(); ) {
			BodyDeclaration d = (BodyDeclaration) it.next();
			d.accept(this);
		}
		this.indent--;
		printIndent();
		this.buffer.append("}\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(TypeDeclarationStatement node) {
		if (node.getAST().apiLevel() == JLS2) {
			getTypeDeclaration(node).accept(this);
		}
		if (node.getAST().apiLevel() >= JLS3) {
			node.getDeclaration().accept(this);
		}
		return false;
	}

	@Override
	public boolean visit(TypeLiteral node) {
		node.getType().accept(this);
		this.buffer.append(".class");//$NON-NLS-1$
		return false;
	}

	/*
	 * @see ASTVisitor#visit(TypeMethodReference)
	 * 
	 * @since 3.10
	 */
	@Override
	public boolean visit(TypeMethodReference node) {
		node.getType().accept(this);
		visitReferenceTypeArguments(node.typeArguments());
		node.getName().accept(this);
		return false;
	}

	@Override
	public boolean visit(TypeParameter node) {
		if (node.getAST().apiLevel() >= JLS8) {
			printModifiers(node.modifiers());
		}
		node.getName().accept(this);
		if (!node.typeBounds().isEmpty()) {
			this.buffer.append(" extends ");//$NON-NLS-1$
			for (Iterator it = node.typeBounds().iterator(); it.hasNext(); ) {
				Type t = (Type) it.next();
				t.accept(this);
				if (it.hasNext()) {
					this.buffer.append(" & ");//$NON-NLS-1$
				}
			}
		}
		return false;
	}

	@Override
	public boolean visit(UnionType node) {
		for (Iterator it = node.types().iterator(); it.hasNext(); ) {
			Type t = (Type) it.next();
			t.accept(this);
			if (it.hasNext()) {
				this.buffer.append('|');
			}
		}
		return false;
	}

	@Override
	public boolean visit(UsesDirective node) {
		printIndent();
		this.buffer.append("uses");//$NON-NLS-1$
		this.buffer.append(" ");//$NON-NLS-1$
		node.getName().accept(this);
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(VariableDeclarationExpression node) {
		if (node.getAST().apiLevel() == JLS2) {
			printModifiers(node.getModifiers());
		}
		if (node.getAST().apiLevel() >= JLS3) {
			printModifiers(node.modifiers());
		}
		node.getType().accept(this);
		this.buffer.append(" ");//$NON-NLS-1$
		for (Iterator it = node.fragments().iterator(); it.hasNext(); ) {
			VariableDeclarationFragment f = (VariableDeclarationFragment) it.next();
			f.accept(this);
			if (it.hasNext()) {
				this.buffer.append(", ");//$NON-NLS-1$
			}
		}
		return false;
	}

	@Override
	public boolean visit(VariableDeclarationFragment node) {
		node.getName().accept(this);
		int size = node.getExtraDimensions();
		if (node.getAST().apiLevel() >= JLS8) {
			List dimensions = node.extraDimensions();
			for (int i = 0; i < size; i++) {
				visit((Dimension) dimensions.get(i));
			}
		} else {
			for (int i = 0; i < size; i++) {
				this.buffer.append("[]");//$NON-NLS-1$
			}
		}
		if (node.getInitializer() != null) {
			this.buffer.append("=");//$NON-NLS-1$
			node.getInitializer().accept(this);
		}
		return false;
	}

	@Override
	public boolean visit(VariableDeclarationStatement node) {
		printIndent();
		if (node.getAST().apiLevel() == JLS2) {
			printModifiers(node.getModifiers());
		}
		if (node.getAST().apiLevel() >= JLS3) {
			printModifiers(node.modifiers());
		}
		node.getType().accept(this);
		this.buffer.append(" ");//$NON-NLS-1$
		for (Iterator it = node.fragments().iterator(); it.hasNext(); ) {
			VariableDeclarationFragment f = (VariableDeclarationFragment) it.next();
			f.accept(this);
			if (it.hasNext()) {
				this.buffer.append(", ");//$NON-NLS-1$
			}
		}
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	@Override
	public boolean visit(WhileStatement node) {
		printIndent();
		this.buffer.append("while (");//$NON-NLS-1$
		node.getExpression().accept(this);
		this.buffer.append(") ");//$NON-NLS-1$
		node.getBody().accept(this);
		return false;
	}

	@Override
	public boolean visit(WildcardType node) {
		visitTypeAnnotations(node);
		this.buffer.append("?");//$NON-NLS-1$
		Type bound = node.getBound();
		if (bound != null) {
			if (node.isUpperBound()) {
				this.buffer.append(" extends ");//$NON-NLS-1$
			} else {
				this.buffer.append(" super ");//$NON-NLS-1$
			}
			bound.accept(this);
		}
		return false;
	}
	
	@Override
	public boolean visit(YieldStatement node) {
		if ((node.getAST().isPreviewEnabled()) && node.isImplicit()  && node.getExpression() == null) {
			return false;
		}
		printIndent();
		this.buffer.append("yield"); //$NON-NLS-1$
		if (node.getExpression() != null) {
			this.buffer.append(" ");//$NON-NLS-1$
			node.getExpression().accept(this);
		}
		this.buffer.append(";\n");//$NON-NLS-1$
		return false;
	}

	/**
	 * @deprecated
	 */
	private void visitComponentType(ArrayType node) {
		node.getComponentType().accept(this);
	}

}
