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## org.apache.cayenne.map
Class ObjAttribute

    java.lang.Object
      org.apache.cayenne.map.Attribute
          org.apache.cayenne.map.ObjAttribute

All Implemented Interfaces:
  Serializable, ConfigurationNode, CayenneMapEntry, XMLSerializable

Direct Known Subclasses:
  EmbeddedAttribute

    public class ObjAttribute

extends Attribute
implements ConfigurationNode

An ObjAttribute is a mapping descriptor of a Java class property.

See Also:
  Serialized Form

Field Summary
`protected String` | `dbAttributePath`
`protected String` | `type`
`protected boolean` | `usedForLocking`

Fields inherited from class org.apache.cayenne.map.Attribute
`entity, name`

Constructor Summary
`ObjAttribute()`
`ObjAttribute(ObjAttribute attribute)` Creates a clone of an ObjAttribute argument.
`ObjAttribute(String name)`
`ObjAttribute(String name, String type, ObjEntity entity)`

Method Summary
`
`<T> T`
` | `acceptVisitor(ConfigurationNodeVisitor<T> visitor)`
`void` | `encodeAsXML(XMLEncoder encoder)` Prints itself as XML to the provided XMLEncoder.
`ObjAttribute` | `getClientAttribute()` Returns an ObjAttribute stripped of any server-side information, such as DbAttribute mapping.
`DbAttribute` | `getDbAttribute()` Returns a DbAttribute mapped by this ObjAttribute.
`String` | `getDbAttributeName()` Returns the the name of the mapped DbAttribute.
`String` | `getDbAttributePath()` Returns a dot-separated path that starts in the root DbEntity that maps to this attribute's ObjEntity and spans zero or more relationships, always ending in a DbAttribute name.
`Iterator<CayenneMapEntry>` | `getDbPathIterator()`
`Iterator<CayenneMapEntry>` | `getDbPathIterator(ObjEntity entity)`
`Class<?>` | `getJavaClass()` Returns Java class of an object property described by this attribute.
`int` | `getMaxLength()` Returns this attribute's maximum allowed length
`String` | `getType()` Returns fully qualified Java class name of the object property represented by this attribute.
`boolean` | `isFlattened()` Returns whether this attribute is "flattened", meaning that it points to a column from an entity other than the DbEntity mapped to the parent ObjEntity.
`boolean` | `isInherited()` Returns `true` if attribute inherited from a super entity.
`boolean` | `isMandatory()` Returns whether this attribute is mandatory
`boolean` | `isPrimaryKey()`
`boolean` | `isUsedForLocking()` Returns whether this attribute should be used for locking.
`void` | `setDbAttributePath(String dbAttributePath)`
`void` | `setType(String type)` Sets the type of the data object property.
`void` | `setUsedForLocking(boolean usedForLocking)` Sets whether this attribute should be used for locking.

Methods inherited from class org.apache.cayenne.map.Attribute
`getEntity, getName, getParent, setEntity, setName, setParent, toString`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

### type

    protected String type

### usedForLocking

    protected boolean usedForLocking

### dbAttributePath

    protected String dbAttributePath

Constructor Detail

### ObjAttribute

    public ObjAttribute()

### ObjAttribute

    public ObjAttribute(String name)

### ObjAttribute

    public ObjAttribute(String name,
                        String type,
                        ObjEntity entity)

### ObjAttribute

    public ObjAttribute(ObjAttribute attribute)

  Creates a clone of an ObjAttribute argument.

  Since:
    3.0

Method Detail

### acceptVisitor

    public <T> T acceptVisitor(ConfigurationNodeVisitor<T> visitor)

  Specified by:
    `acceptVisitor` in interface `ConfigurationNode`
  Since:
    3.1

### getJavaClass

    public Class<?> getJavaClass()

  Returns Java class of an object property described by this attribute. Wraps any thrown exceptions into CayenneRuntimeException.

### encodeAsXML

    public void encodeAsXML(XMLEncoder encoder)

  Prints itself as XML to the provided XMLEncoder.

  Specified by:
    `encodeAsXML` in interface `XMLSerializable`
  Specified by:
    `encodeAsXML` in class `Attribute`
  Since:
    1.1

### getType

    public String getType()

  Returns fully qualified Java class name of the object property represented by this attribute.

### setType

    public void setType(String type)

  Sets the type of the data object property. Type is expected to be a fully qualified Java class name.

### isPrimaryKey

    public boolean isPrimaryKey()

  Since:
    3.0

### isUsedForLocking

    public boolean isUsedForLocking()

  Returns whether this attribute should be used for locking.

  Since:
    1.1

### setUsedForLocking

    public void setUsedForLocking(boolean usedForLocking)

  Sets whether this attribute should be used for locking.

  Since:
    1.1

### getDbAttribute

    public DbAttribute getDbAttribute()

  Returns a DbAttribute mapped by this ObjAttribute.

### isInherited

    public boolean isInherited()

  Returns `true` if attribute inherited from a super entity.

  Since:
    3.0

### getDbPathIterator

    public Iterator<CayenneMapEntry> getDbPathIterator()

### getDbPathIterator

    public Iterator<CayenneMapEntry> getDbPathIterator(ObjEntity entity)

### getDbAttributeName

    public String getDbAttributeName()

  Returns the the name of the mapped DbAttribute. This value is the same as "dbAttributePath" for regular attributes mapped to columns. It is equql to the last path component for the flattened attributes.

### setDbAttributePath

    public void setDbAttributePath(String dbAttributePath)

### getDbAttributePath

    public String getDbAttributePath()

  Returns a dot-separated path that starts in the root DbEntity that maps to this attribute's ObjEntity and spans zero or more relationships, always ending in a DbAttribute name.

### isFlattened

    public boolean isFlattened()

  Returns whether this attribute is "flattened", meaning that it points to a column from an entity other than the DbEntity mapped to the parent ObjEntity.

  Since:
    3.0

### isMandatory

    public boolean isMandatory()

  Returns whether this attribute is mandatory

  See Also:
    `DbAttribute.isMandatory()`

### getMaxLength

    public int getMaxLength()

  Returns this attribute's maximum allowed length

  See Also:
    `DbAttribute.getMaxLength()`

### getClientAttribute

    public ObjAttribute getClientAttribute()

  Returns an ObjAttribute stripped of any server-side information, such as DbAttribute mapping.

  Since:
    1.2

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