org.zkoss.zk.xel.impl
Class ExecutionResolver

java.lang.Object
  extended by org.zkoss.zk.xel.impl.ExecutionResolver
All Implemented Interfaces:
VariableResolver, VariableResolverX

public class ExecutionResolver
extends java.lang.Object
implements VariableResolverX

A variable resolver that is based on the specified execution.

Since:
3.0.0
Author:
tomyeh

Constructor Summary
ExecutionResolver(Execution exec, VariableResolver parent)
          Constructs a resolver with a parent and a page.
 
Method Summary
 java.lang.Object getSelf()
          Returns the self variable.
 java.lang.Object resolveVariable(java.lang.String name)
          Resolves the specified variable.
 java.lang.Object resolveVariable(XelContext ctx, java.lang.Object base, java.lang.Object onm)
          Resolves the the given variable on the given base object.
 void setSelf(java.lang.Object self)
          Sets the self variable.
 java.lang.String toString()
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

ExecutionResolver

public ExecutionResolver(Execution exec,
                         VariableResolver parent)
Constructs a resolver with a parent and a page.

Parameters:
parent - the parent resolver (null means ignored).
exec - the current execution
Method Detail

setSelf

public void setSelf(java.lang.Object self)
Sets the self variable. The self variable also acts as the context to resolve other variables.


getSelf

public java.lang.Object getSelf()
Returns the self variable.


resolveVariable

public java.lang.Object resolveVariable(java.lang.String name)
                                 throws XelException
Description copied from interface: VariableResolver
Resolves the specified variable.

Specified by:
resolveVariable in interface VariableResolver
Parameters:
name - the name of the variable to resolve
Throws:
XelException

resolveVariable

public java.lang.Object resolveVariable(XelContext ctx,
                                        java.lang.Object base,
                                        java.lang.Object onm)
Description copied from interface: VariableResolverX
Resolves the the given variable on the given base object.

It resolves not only top-level variables but also properties. For example, when resloving foo.duke, resolveVariable(ctx, null, "foo") is called first. And if it returns an non-null object, resolveVariable(ctx, foo, "duke"),/code> is called then (where we assume the returned object in the previous call is foo).

Specified by:
resolveVariable in interface VariableResolverX
Parameters:
ctx - the context of this evaluation
base - the base object whose property value is to be returned, or null to reslove a top-level variable.
onm - the name of the variable (or property) to resolve

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object


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