org.apache.openjpa.kernel.exps
Class ValuePath

java.lang.Object
  extended by org.apache.openjpa.kernel.exps.Val
      extended by org.apache.openjpa.kernel.exps.CandidatePath
          extended by org.apache.openjpa.kernel.exps.ValuePath
All Implemented Interfaces:
Serializable, Path, Value

 class ValuePath
extends CandidatePath

Represents a path that begins with a variable or parameter.

Author:
Abe White

Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.openjpa.kernel.exps.CandidatePath
CandidatePath.Traversal
 
Field Summary
 
Fields inherited from class org.apache.openjpa.kernel.exps.CandidatePath
_actions, _correlationVar
 
Constructor Summary
ValuePath(Val val)
          Constructor.
 
Method Summary
 void acceptVisit(ExpressionVisitor visitor)
          Accept a visit from a tree visitor.
protected  Object eval(Object candidate, Object orig, StoreContext ctx, Object[] params)
          Return this value for the given candidate.
 Class getCandidateType()
           
 
Methods inherited from class org.apache.openjpa.kernel.exps.CandidatePath
castTo, equals, get, get, get, getCorrelationVar, getSchemaAlias, getType, getXmlMapping, hashCode, last, setImplicitType, setSchemaAlias, setSubqueryContext
 
Methods inherited from class org.apache.openjpa.kernel.exps.Val
eval, evaluate, evaluate, getAlias, getMetaData, getName, getPath, getSelectAs, isAggregate, isVariable, isXPath, setAlias, setMetaData
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.apache.openjpa.kernel.exps.Value
getAlias, getMetaData, getName, getPath, getSelectAs, isAggregate, isVariable, isXPath, setAlias, setMetaData
 

Constructor Detail

ValuePath

public ValuePath(Val val)
Constructor. Supply context value.

Method Detail

getCandidateType

public Class getCandidateType()
Overrides:
getCandidateType in class CandidatePath

eval

protected Object eval(Object candidate,
                      Object orig,
                      StoreContext ctx,
                      Object[] params)
Description copied from class: Val
Return this value for the given candidate.

Overrides:
eval in class CandidatePath

acceptVisit

public void acceptVisit(ExpressionVisitor visitor)
Description copied from interface: Value
Accept a visit from a tree visitor.

Specified by:
acceptVisit in interface Value
Overrides:
acceptVisit in class Val


Copyright © 2006-2012 Apache Software Foundation. All Rights Reserved.