Top Description Fields Constructors Methods
org.objectweb.asm.tree.analysis

public Class SourceValue

extends Object
implements Value
Class Inheritance
All Implemented Interfaces
org.objectweb.asm.tree.analysis.Value
Imports
java.util.Set, org.objectweb.asm.tree.AbstractInsnNode

A Value which keeps track of the bytecode instructions that can produce it.
Author
Eric Bruneton

Field Summary

Modifier and TypeField and Description
public final Set<AbstractInsnNode>
insns

The instructions that can produce this value.

public final int
size

The size of this value, in 32 bits words.

Constructor Summary

AccessConstructor and Description
public
SourceValue(final int
the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, float, object and array types, and 2 for long and double.
size
)

Constructs a new SourceValue.

public
SourceValue(final int
the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, float, object and array types, and 2 for long and double.
size
,
final AbstractInsnNode
an instruction that can produce this value.
insnNode
)

Constructs a new SourceValue.

public
SourceValue(final int
the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, float, object and array types, and 2 for long and double.
size
,
final Set<AbstractInsnNode>
the instructions that can produce this value.
insnSet
)

Constructs a new SourceValue.

Method Summary

Modifier and TypeMethod and Description
public boolean
equals(final Object
the reference object with which to compare.
value
)

Overrides java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.
public int

Returns:

the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, float, object and array types, and 2 for long and double.
getSize
()

Implements org.objectweb.asm.tree.analysis.Value.getSize.

Returns the size of this value.
public int
hashCode()

Overrides java.lang.Object.hashCode.

Returns a hash code value for this object.
Inherited from java.lang.Object:
clonefinalizegetClassnotifynotifyAlltoStringwaitwaitwait

Field Detail

insnsback to summary
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 two ISTORE instructions at line 1 and 3:

1: i = 0;
2: if (...) {
3:   i = 1;
4: }
5: return i;
sizeback to summary
public final int size

The size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, float, object and array types, and 2 for long and double.

Constructor Detail

SourceValueback to summary
public SourceValue(final int size)

Constructs a new SourceValue.

Parameters
size:int

the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, float, object and array types, and 2 for long and double.

SourceValueback to summary
public SourceValue(final int size, final AbstractInsnNode insnNode)

Constructs a new SourceValue.

Parameters
size:int

the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, float, object and array types, and 2 for long and double.

insnNode:AbstractInsnNode

an instruction that can produce this value.

SourceValueback to summary
public SourceValue(final int size, final Set<AbstractInsnNode> insnSet)

Constructs a new SourceValue.

Parameters
size:int

the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, float, object and array types, and 2 for long and double.

insnSet:Set<AbstractInsnNode>

the instructions that can produce this value.

Method Detail

equalsback to summary
public boolean equals(final Object value)

Overrides java.lang.Object.equals.

Doc from java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

  • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
  • For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters
value:Object

the reference object with which to compare.

Returns:boolean

true if this object is the same as the obj argument; false otherwise.

Annotations
@Override
getSizeback to summary
public int getSize()

Implements org.objectweb.asm.tree.analysis.Value.getSize.

Returns the size of this value.

Returns:int

the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, float, object and array types, and 2 for long and double.

Annotations
@Override
hashCodeback to summary
public int hashCode()

Overrides java.lang.Object.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.
Returns:int

a hash code value for this object

Annotations
@Override