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## org.apache.openjpa.jdbc.meta
Interface Embeddable

All Known Implementing Classes:
  HandlerFieldStrategy, PrimitiveFieldStrategy, RelationFieldStrategy, StringFieldStrategy

    public interface Embeddable

Interface for field strategies that can managed fields of embedded-element, embedded-key, and embedded-value objects. Fields of directly embedded objects do not have to implement this interface.

Since:
  0.4.0
Author:
  Abe White

Field Summary
`static Object` | `UNSUPPORTED`

Method Summary
`ColumnIO` | `getColumnIO()` Return column I/O information for this mapping.
`Column[]` | `getColumns()` Return the columns used by this strategy.
`Object[]` | `getResultArguments()` Return the arguments needed to extract datastore values via `Result.getObject(java.lang.Object, int, java.lang.Object)` for each column.
`void` | `loadEmbedded(OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Object val)` Load this strategy's field by transforming the given datastore value.
`Object` | `toEmbeddedDataStoreValue(Object val, JDBCStore store)` Convert the given Java value to its datastore equivalent.
`Object` | `toEmbeddedObjectValue(Object val)` Convert the given datastore value to its Java equivalent.

Field Detail

### UNSUPPORTED

    static final Object UNSUPPORTED

Method Detail

### getColumns

    Column[] getColumns()

  Return the columns used by this strategy.

### getColumnIO

    ColumnIO getColumnIO()

  Return column I/O information for this mapping.

### getResultArguments

    Object[] getResultArguments()

  Return the arguments needed to extract datastore values via `Result.getObject(java.lang.Object, int, java.lang.Object)` for each column.

### toEmbeddedDataStoreValue

    Object toEmbeddedDataStoreValue(Object val,
                                    JDBCStore store)

  Convert the given Java value to its datastore equivalent. If this mapping occupies multiple columns, return an object array with one element per column. For relation id columns, return the state manager the column depends on.

### toEmbeddedObjectValue

    Object toEmbeddedObjectValue(Object val)

  Convert the given datastore value to its Java equivalent. If `getColumns()` returns multiple columns, the given datastore value will be an object array of the corresponding length. This method must only be supported by mappings of embedded id objects. In other cases `loadEmbedded(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.kernel.JDBCFetchConfiguration, java.lang.Object)` will be used instead. Return `UNSUPPORTED` if this mapping cannot support this method.

### loadEmbedded

    void loadEmbedded(OpenJPAStateManager sm,
                      JDBCStore store,
                      JDBCFetchConfiguration fetch,
                      Object val)
                      throws SQLException

  Load this strategy's field by transforming the given datastore value. If `getColumns()` returns multiple columns, the given datastore value will be an object array of the corresponding length. The value does not have to be loaded immediately; it may be stored as impl data.

  Throws:
    `SQLException`

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Copyright © 2006 Apache Software Foundation. All Rights Reserved.