org.quattor.pan.dml

Class DML

java.lang.Object

org.quattor.pan.dml.AbstractOperation

org.quattor.pan.dml.DML

All Implemented Interfaces:

Operation

public class DML
extends AbstractOperation

This operation contains a list of other DML operations and acts like a procedure. When executed, a DML object just pushes all of the operations onto the operation stack.

Author:

loomis

Field Summary

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

ops, sourceRange

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DML(SourceRange sourceRange, Operation... operations) Create new DML instance from variable list of arguments (as operations).

Method Summary

Methods

Modifier and Type	Method and Description
Element	execute(Context context) Execution of a DML block consists simply of executing the block's arguments in order.
static Operation	getInstance(SourceRange sourceRange, Operation... operations) Factory method to create a new DML block, although this may return another Operation because of optimization.
static DML	getUnoptimizedInstance(SourceRange sourceRange, Operation... operations) Factory method to create a new DML block, although this may return another Operation because of optimization.
String	toString() String representation of a DML block is a list of the operations within braces.

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

calculateArgs, calculateTerms, checkInvalidSelfContext, checkRestrictedContext, getOperations, getSourceRange

Methods inherited from class java.lang.Object

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

Constructor Detail

DML

protected DML(SourceRange sourceRange,
   Operation... operations)

Create new DML instance from variable list of arguments (as operations).

Parameters:

sourceRange - source location of this operation and its arguments

operations - variable list of arguments

Method Detail

getInstance

public static Operation getInstance(SourceRange sourceRange,
                    Operation... operations)

Factory method to create a new DML block, although this may return another Operation because of optimization.

Parameters:

sourceRange - location of this block in the source file

operations - the operations that make up this block

Returns:

optimized Operation representing DML block

getUnoptimizedInstance

public static DML getUnoptimizedInstance(SourceRange sourceRange,
                         Operation... operations)

Factory method to create a new DML block, although this may return another Operation because of optimization.

Parameters:

sourceRange - location of this block in the source file

operations - the operations that make up this block

Returns:

optimized Operation representing DML block

execute

public Element execute(Context context)

Execution of a DML block consists simply of executing the block's arguments in order. If no arguments are run, then the value of the block is Undef.

Specified by:

execute in interface Operation

Specified by:

execute in class AbstractOperation

Parameters:

context - evaluation context for the statement

Returns:

Element produced by running operation

toString

public String toString()

String representation of a DML block is a list of the operations within braces.

Overrides:

toString in class AbstractOperation

Returns:

string of class' simple name