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## org.apache.openjpa.jdbc.meta.strats
Class EmbeddedClassStrategy

    java.lang.Object
      org.apache.openjpa.jdbc.meta.strats.AbstractStrategy
          org.apache.openjpa.jdbc.meta.strats.AbstractClassStrategy
              org.apache.openjpa.jdbc.meta.strats.EmbeddedClassStrategy

All Implemented Interfaces:
  ClassStrategy, Strategy

    public class EmbeddedClassStrategy

extends AbstractClassStrategy

Class mapping for embedded objects.

Author:
  Abe White

Field Summary

Fields inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractClassStrategy
`cls`

Constructor Summary
`EmbeddedClassStrategy()`

Method Summary
`Object` | `getNullIndicatorValue(OpenJPAStateManager sm)` Return the proper synthetic null indicator value for the given instance.
`boolean` | `indicatesNull(Object val)` Return whether the given null indicator value means the object is null.
`boolean` | `isPrimaryKeyObjectId(boolean hasAll)` Return true if the this class' primary key columns correspond to the base class' primary key columns used to construct oid values.
`void` | `map(boolean adapt)` Map the owning mapping using this strategy.

Methods inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractClassStrategy
`customLoad, customLoad, customLoad, joinSuperclass, setClassMapping, supportsEagerSelect`

Methods inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractStrategy
`customDelete, customInsert, customUpdate, delete, getAlias, initialize, insert, isCustomDelete, isCustomInsert, isCustomUpdate, update`

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

Methods inherited from interface org.apache.openjpa.jdbc.meta.Strategy
`customDelete, customInsert, customUpdate, delete, getAlias, initialize, insert, isCustomDelete, isCustomInsert, isCustomUpdate, update`

Constructor Detail

### EmbeddedClassStrategy

    public EmbeddedClassStrategy()

Method Detail

### map

    public void map(boolean adapt)

  Description copied from interface: `Strategy`
  Map the owning mapping using this strategy.

  Specified by:
    `map` in interface `Strategy`
  Overrides:
    `map` in class `AbstractStrategy`
  Parameters:
    `adapt` - if true, use the owning mapping's raw mapping info to set its ORM data; if false, ORM data will already be set

### getNullIndicatorValue

    public Object getNullIndicatorValue(OpenJPAStateManager sm)

  Return the proper synthetic null indicator value for the given instance.

### indicatesNull

    public boolean indicatesNull(Object val)

  Return whether the given null indicator value means the object is null.

### isPrimaryKeyObjectId

    public boolean isPrimaryKeyObjectId(boolean hasAll)

  Description copied from interface: `ClassStrategy`
  Return true if the this class' primary key columns correspond to the base class' primary key columns used to construct oid values. Base classes always return true. Classes that join to the base class table, though, may not always join using the same columns the base class uses for oid values, or may not use all the columns. When performing a select, we will join down to the most-derived class that is identified by oid values. We cannot use non-primary key field values for joining during selects, because the field values to join on might be the ones we're trying to select! Similarly, we can only reconstruct oid values for selected objects using classes whose primary keys store oid values.

  Specified by:
    `isPrimaryKeyObjectId` in interface `ClassStrategy`
  Overrides:
    `isPrimaryKeyObjectId` in class `AbstractClassStrategy`
  Parameters:
    `hasAll` - if true, there must be a primary key column for every base class primary key column; if false the primary key must only match a subset of the base class primary key columns

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Copyright © 2006 Apache Software Foundation. All Rights Reserved.