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## org.apache.openjpa.kernel.exps
Class SubQ

    java.lang.Object
      org.apache.openjpa.kernel.exps.Val
          org.apache.openjpa.kernel.exps.SubQ

All Implemented Interfaces:
  Serializable, Subquery, Value

     class SubQ

extends Val
implements Subquery

An in-memory representation of a `Subquery`. Currently subqueries aren't supported for in-memory use.

Author:
  Abe White

Constructor Summary
`SubQ(String alias)`

Method Summary
`protected Object` | `eval(Object candidate, Object orig, StoreContext ctx, Object[] params)` Return this value for the given candidate.
`String` | `getCandidateAlias()` Return the candidate alias for this subquery.
`Object` | `getSelect()`
`String` | `getSubqAlias()`
`Class` | `getType()` Return the expected type for this value, or `Object` if the type is unknown.
`void` | `setImplicitType(Class type)` Set the implicit type of the value, based on how it is used in the filter.
`void` | `setQueryExpressions(QueryExpressions q)` Set the parsed subquery.
`void` | `setSubqAlias(String subqAlias)`

Methods inherited from class org.apache.openjpa.kernel.exps.Val
`acceptVisit, eval, evaluate, evaluate, getAlias, getMetaData, getName, getPath, getSelectAs, isAggregate, isVariable, isXPath, setAlias, setMetaData`

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.kernel.exps.Value
`acceptVisit, getAlias, getMetaData, getName, getPath, getSelectAs, isAggregate, isVariable, isXPath, setAlias, setMetaData`

Constructor Detail

### SubQ

    public SubQ(String alias)

Method Detail

### getSelect

    public Object getSelect()

  Specified by:
    `getSelect` in interface `Subquery`

### getCandidateAlias

    public String getCandidateAlias()

  Description copied from interface: `Subquery`
  Return the candidate alias for this subquery.

  Specified by:
    `getCandidateAlias` in interface `Subquery`

### setSubqAlias

    public void setSubqAlias(String subqAlias)

  Specified by:
    `setSubqAlias` in interface `Subquery`

### getSubqAlias

    public String getSubqAlias()

  Specified by:
    `getSubqAlias` in interface `Subquery`

### setQueryExpressions

    public void setQueryExpressions(QueryExpressions q)

  Description copied from interface: `Subquery`
  Set the parsed subquery.

  Specified by:
    `setQueryExpressions` in interface `Subquery`

### getType

    public Class getType()

  Description copied from interface: `Value`
  Return the expected type for this value, or `Object` if the type is unknown.

  Specified by:
    `getType` in interface `Value`

### setImplicitType

    public void setImplicitType(Class type)

  Description copied from interface: `Value`
  Set the implicit type of the value, based on how it is used in the filter. This method is only called on values who return `Object` from `Value.getType()`.

  Specified by:
    `setImplicitType` in interface `Value`

### eval

    protected Object eval(Object candidate,
                          Object orig,
                          StoreContext ctx,
                          Object[] params)

  Description copied from class: `Val`
  Return this value for the given candidate.

  Specified by:
    `eval` in class `Val`

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Copyright © 2006-2013 Apache Software Foundation. All Rights Reserved.