org.quattor.pan.dml.operators
Class SetSelf

java.lang.Object
  org.quattor.pan.dml.AbstractOperation
      org.quattor.pan.dml.operators.SetValue
          org.quattor.pan.dml.operators.SetSelf

All Implemented Interfaces:

Operation

public class SetSelf
extends SetValue

Implements a special operation to allow a result to be assigned to a variable. This is generated by the compiler, but is not explicitly visible in the pan language.

Author:

loomis

Field Summary

Fields inherited from class org.quattor.pan.dml.operators.SetValue

identifier

Fields inherited from class org.quattor.pan.dml.AbstractOperation

ops, sourceRange

Constructor Summary

SetSelf(SourceRange sourceRange, Operation... operations)

Method Summary

void	checkInvalidSelfContext() Default implementation recursively calls this method on all of the contained operations (arguments).
Element	execute(Context context) Execute this operation within the given context.
Element	execute(Context context, Element result)
java.lang.String	toString() Default string representation of an operation is the class' simple name.

Methods inherited from class org.quattor.pan.dml.operators.SetValue

checkStaticIndexes, getInstance, getInstance, validName

Methods inherited from class org.quattor.pan.dml.AbstractOperation

calculateArgs, calculateTerms, checkRestrictedContext, getOperations, getSourceRange

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

SetSelf

public SetSelf(SourceRange sourceRange,
               Operation... operations)
        throws SyntaxException

Throws:

SyntaxException

Method Detail

checkInvalidSelfContext

public void checkInvalidSelfContext()
                             throws SyntaxException

Description copied from class: AbstractOperation

Default implementation recursively calls this method on all of the contained operations (arguments). Subclasses that reference SELF should override this method and throw a SyntaxException.

Specified by:

checkInvalidSelfContext in interface Operation

Overrides:

checkInvalidSelfContext in class AbstractOperation

Throws:

SyntaxException - if operation references SELF

execute

public Element execute(Context context)

Description copied from interface: Operation

Execute this operation within the given context. If an error occurs, an EvaluationException will be thrown with the details.

Specified by:

execute in interface Operation

Overrides:

execute in class SetValue

Parameters:

context - evaluation context for the statement

Returns:

Element produced by running operation

execute

public Element execute(Context context,
                       Element result)

Overrides:

execute in class SetValue

toString

public java.lang.String toString()

Description copied from class: AbstractOperation

Default string representation of an operation is the class' simple name.

Overrides:

toString in class SetValue

Returns:

string of class' simple name