org.apache.tajo.org.objectweb.asm.tree.analysis

Class SourceValue

java.lang.Object

org.apache.tajo.org.objectweb.asm.tree.analysis.SourceValue

All Implemented Interfaces:

Value

public class SourceValue
extends Object
implements Value

A Value that is represented by its type in a two types type system. This type system distinguishes the ONEWORD and TWOWORDS types.

Author:

Eric Bruneton

Field Summary

Fields

Modifier and Type	Field and Description
Set<AbstractInsnNode>	insns The instructions that can produce this value.
int	size The size of this value.

Constructor Summary

Constructors

Constructor and Description
SourceValue(int size)
SourceValue(int size, AbstractInsnNode insn)
SourceValue(int size, Set<AbstractInsnNode> insns)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object value)
int	getSize() Returns the size of this value in words.
int	hashCode()

Methods inherited from class java.lang.Object

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

Field Detail

size

public final int size

The size of this value.

insns

public final Set<AbstractInsnNode> insns

The instructions that can produce this value. For example, for the Java code below, the instructions that can produce the value of i at line 5 are the txo ISTORE instructions at line 1 and 3:

 1: i = 0;
 2: if (...) {
 3:   i = 1;
 4: }
 5: return i;
 

This field is a set of AbstractInsnNode objects.

Constructor Detail

SourceValue

public SourceValue(int size)

SourceValue

public SourceValue(int size,
           AbstractInsnNode insn)

SourceValue

public SourceValue(int size,
           Set<AbstractInsnNode> insns)

Method Detail

getSize

public int getSize()

Description copied from interface: Value

Returns the size of this value in words.

Specified by:

getSize in interface Value

Returns:

either 1 or 2.

equals

public boolean equals(Object value)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object