Package org.apache.bcel.classfile

Class Method

java.lang.Object

org.apache.bcel.classfile.AccessFlags

org.apache.bcel.classfile.FieldOrMethod

org.apache.bcel.classfile.Method

All Implemented Interfaces:

Cloneable, Node

public final class Method
extends FieldOrMethod

This class represents the method info structure, i.e., the representation for a method in the class. See JVM specification for details. A method has access flags, a name, a signature and a number of attributes.

Field Summary

Fields

Modifier and Type	Field	Description
static final Method[]	EMPTY_ARRAY	Empty array constant.

Fields inherited from class org.apache.bcel.classfile.FieldOrMethod

attributes, attributes_count, constant_pool, name_index, signature_index

Fields inherited from class org.apache.bcel.classfile.AccessFlags

access_flags

Constructor Summary

Constructors

Constructor	Description
Method()	Empty constructor, all attributes have to be defined via 'setXXX' methods.
Method(int accessFlags, int nameIndex, int signatureIndex, Attribute[] attributes, ConstantPool constantPool)
Method(Method c)	Initialize from another object.

Method Summary

Modifier and Type	Method	Description
void	accept(Visitor v)	Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class.
Method	copy(ConstantPool constantPool)
boolean	equals(Object obj)	Return value as defined by given BCELComparator strategy.
Type[]	getArgumentTypes()
Code	getCode()
static BCELComparator<Method>	getComparator()
ExceptionTable	getExceptionTable()
LineNumberTable	getLineNumberTable()
LocalVariableTable	getLocalVariableTable()
LocalVariableTypeTable	getLocalVariableTypeTable()	Gets the local variable type table attribute LocalVariableTypeTable.
ParameterAnnotationEntry[]	getParameterAnnotationEntries()
Type	getReturnType()
int	hashCode()	Return value as defined by given BCELComparator strategy.
static void	setComparator(BCELComparator<Method> comparator)
String	toString()	Return string representation close to declaration format, 'public static void main(String[] args) throws IOException', e.g.

Methods inherited from class org.apache.bcel.classfile.FieldOrMethod

copy_, dump, getAnnotationEntries, getAttribute, getAttributes, getConstantPool, getGenericSignature, getName, getNameIndex, getSignature, getSignatureIndex, setAttributes, setConstantPool, setNameIndex, setSignatureIndex

Methods inherited from class org.apache.bcel.classfile.AccessFlags

getAccessFlags, getModifiers, isAbstract, isAbstract, isAnnotation, isAnnotation, isEnum, isEnum, isFinal, isFinal, isInterface, isInterface, isNative, isNative, isPrivate, isPrivate, isProtected, isProtected, isPublic, isPublic, isStatic, isStatic, isStrictfp, isStrictfp, isSynchronized, isSynchronized, isSynthetic, isSynthetic, isTransient, isTransient, isVarArgs, isVarArgs, isVolatile, isVolatile, setAccessFlags, setModifiers

Methods inherited from class java.lang.Object

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

Field Details

EMPTY_ARRAY

public static final Method[] EMPTY_ARRAY

Empty array constant.

Since:

6.6.0

Constructor Details

Method

public Method()

Empty constructor, all attributes have to be defined via 'setXXX' methods. Use at your own risk.

Method

public Method(int accessFlags,
 int nameIndex,
 int signatureIndex,
 Attribute[] attributes,
 ConstantPool constantPool)

Parameters:

accessFlags - Access rights of method

nameIndex - Points to field name in constant pool

signatureIndex - Points to encoded signature

attributes - Collection of attributes

constantPool - Array of constants

Method

public Method(Method c)

Initialize from another object. Note that both objects use the same references (shallow copy). Use clone() for a physical copy.

Parameters:

c - Source to copy.

Method Details

getComparator

public static BCELComparator<Method> getComparator()

Returns:

Comparison strategy object.

setComparator

public static void setComparator(BCELComparator<Method> comparator)

Parameters:

comparator - Comparison strategy object.

accept

public void accept(Visitor v)

Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class. I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.

Parameters:

v - Visitor object

copy

public Method copy(ConstantPool constantPool)

Returns:

deep copy of this method

equals

public boolean equals(Object obj)

Return value as defined by given BCELComparator strategy. By default two method objects are said to be equal when their names and signatures are equal.

Overrides:

equals in class Object

See Also:

• Object.equals(Object)

getArgumentTypes

public Type[] getArgumentTypes()

Returns:

array of method argument types

getCode

public Code getCode()

Returns:

Code attribute of method, if any

getExceptionTable

public ExceptionTable getExceptionTable()

Returns:

ExceptionTable attribute of method, if any, i.e., list all exceptions the method may throw not exception handlers!

getLineNumberTable

public LineNumberTable getLineNumberTable()

Returns:

LineNumberTable of code attribute if any, i.e. the call is forwarded to the Code atribute.

getLocalVariableTable

public LocalVariableTable getLocalVariableTable()

Returns:

LocalVariableTable of code attribute if any, i.e. the call is forwarded to the Code attribute.

getLocalVariableTypeTable

public LocalVariableTypeTable getLocalVariableTypeTable()

Gets the local variable type table attribute LocalVariableTypeTable.

Returns:

LocalVariableTypeTable of code attribute if any, i.e. the call is forwarded to the Code attribute.

Since:

6.10.0

getParameterAnnotationEntries

public ParameterAnnotationEntry[] getParameterAnnotationEntries()

Returns:

Annotations on the parameters of a method

Since:

6.0

getReturnType

public Type getReturnType()

Returns:

return type of method

hashCode

public int hashCode()

Return value as defined by given BCELComparator strategy. By default return the hash code of the method's name XOR signature.

Overrides:

hashCode in class Object

See Also:

• Object.hashCode()

toString

public String toString()

Return string representation close to declaration format, 'public static void main(String[] args) throws IOException', e.g.

Overrides:

toString in class Object

Returns:

String representation of the method.