com.goldencode.p2j.convert

Class UnreachableCodeWorker

java.lang.Object

com.goldencode.p2j.pattern.AbstractPatternWorker

com.goldencode.p2j.convert.UnreachableCodeWorker

All Implemented Interfaces:

PatternWorker

public final class UnreachableCodeWorker
extends AbstractPatternWorker

Helper routines for the unreachable code processing rules. This provides support for constant resolution and for simple expression evaluation to statically determine if a particular conditional execution path can be proven to be unreachable.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	UnreachableCodeWorker.Helper Provides user-level APIs necessary for unreachable code processing.

Field Summary

Fields

Modifier and Type	Field and Description
private static long	RES_FALSE Expression evaluates to false.
private static long	RES_TRUE Expression evaluates to true.
private static long	RES_UNKNOWN Expression cannot be evaluated statically.

Constructor Summary

Constructors

Constructor and Description
UnreachableCodeWorker() Default constructor which initializes libraries.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	resolveConstant(java.lang.String constant) Resolve constant name into its value.

Methods inherited from class com.goldencode.p2j.pattern.AbstractPatternWorker

getCopy, getLibrary, getResolver, getSource, isConditionalRuleSets, isFlagActivated, isRuntimeQueryMode, registerTree, setLibrary

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.goldencode.p2j.pattern.PatternWorker

finish, initialize, leaveAst, visitAst

Field Detail

RES_FALSE

private static final long RES_FALSE

Expression evaluates to false.

See Also:

Constant Field Values

RES_TRUE

private static final long RES_TRUE

Expression evaluates to true.

See Also:

Constant Field Values

RES_UNKNOWN

private static final long RES_UNKNOWN

Expression cannot be evaluated statically.

See Also:

Constant Field Values

Constructor Detail

UnreachableCodeWorker

public UnreachableCodeWorker()

Default constructor which initializes libraries.

Method Detail

resolveConstant

public java.lang.Object resolveConstant(java.lang.String constant)

Resolve constant name into its value.

Specified by:

resolveConstant in interface PatternWorker

Overrides:

resolveConstant in class AbstractPatternWorker

Parameters:

constant - Name of the constant.

Returns:

Value for the known constant name or null if the name is unknown.