Class DbAttribute

java.lang.Object
org.apache.cayenne.map.Attribute<DbEntity, DbAttribute, DbRelationship>
org.apache.cayenne.map.DbAttribute
All Implemented Interfaces:
ProjectNode, XMLSerializable
public class DbAttribute extends Attribute<DbEntity, DbAttribute, DbRelationship> implements ProjectNode
A DbAttribute defines a descriptor for a single database table column.

  • Field Details

    • type

      protected int type
      Defines JDBC type of the column.

    • mandatory

      protected boolean mandatory
      Defines whether the attribute allows nulls.

    • primaryKey

      protected boolean primaryKey
      Defines whether the attribute is a part of the table primary key.

    • generated

      protected boolean generated
      Defines whether this column value is generated by the database. Other terms for such columns are "auto-increment" or "identity".
      Since:
      1.2

    • maxLength

      protected int maxLength

    • scale

      protected int scale
      Since:
      3.0

    • attributePrecision

      protected int attributePrecision
      Since:
      3.0

  • Constructor Details

    • DbAttribute

      public DbAttribute()

    • DbAttribute

      public DbAttribute(String name)

    • DbAttribute

      public DbAttribute(String name, int type, DbEntity entity)

  • Method Details

    • getEntity

      public DbEntity getEntity()
      Description copied from class: Attribute
      Returns parent entity that holds this attribute.
      Overrides:
      getEntity in class Attribute<DbEntity, DbAttribute, DbRelationship>

    • acceptVisitor

      public <T> T acceptVisitor(ProjectNodeVisitor<T> visitor)
      Specified by:
      acceptVisitor in interface ProjectNode

    • encodeAsXML

      public void encodeAsXML(XMLEncoder encoder, ProjectNodeVisitor delegate)
      Prints itself as XML to the provided XMLEncoder.
      Specified by:
      encodeAsXML in interface XMLSerializable
      Specified by:
      encodeAsXML in class Attribute<DbEntity, DbAttribute, DbRelationship>
      Since:
      1.1

    • getAliasedName

      public String getAliasedName(String alias)

    • getType

      public int getType()
      Returns the SQL type of the column.
      See Also:

    • setType

      public void setType(int type)
      Sets the SQL type for the column.
      See Also:

    • isPrimaryKey

      public boolean isPrimaryKey()

    • setPrimaryKey

      public void setPrimaryKey(boolean primaryKey)
      Updates attribute "primaryKey" property.

    • isMandatory

      public boolean isMandatory()

    • setMandatory

      public void setMandatory(boolean mandatory)

    • getMaxLength

      public int getMaxLength()
      Returns the length of database column described by this attribute.

    • setMaxLength

      public void setMaxLength(int maxLength)
      Sets the length of character or binary type or max num of digits for DECIMAL.

    • isGenerated

      public boolean isGenerated()
      Returns true if this column value is generated by the database. Other terms for such columns are "auto-increment" or "identity".
      Since:
      1.2

    • setGenerated

      public void setGenerated(boolean generated)
      Updates attribute "generated" property.
      Since:
      1.2

    • getAttributePrecision

      public int getAttributePrecision()
      Since:
      3.0

    • setAttributePrecision

      public void setAttributePrecision(int attributePrecision)
      Since:
      3.0

    • getScale

      public int getScale()
      Returns the number of digits after period for decimal attributes. Returns "-1" if not set.
      Since:
      3.0

    • setScale

      public void setScale(int scale)
      Since:
      3.0

    • getJavaClassName

      public String getJavaClassName()
      Returns:
      java class guessed by the JDBC type of this attribute
      Since:
      5.0

    • toString

      public String toString()
      Overrides:
      toString in class Attribute<DbEntity, DbAttribute, DbRelationship>