// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
package org.objectweb.asm;
/**
* A reference to a field or a method.
*
* @author Remi Forax
* @author Eric Bruneton
*/
public final class
Handle {
/**
* The kind of field or method designated by this Handle. Should be {@link Opcodes#H_GETFIELD},
* {@link Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, {@link
* Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC}, {@link Opcodes#H_INVOKESPECIAL},
* {@link Opcodes#H_NEWINVOKESPECIAL} or {@link Opcodes#H_INVOKEINTERFACE}.
*/
private final int
tag;
/** The internal name of the class that owns the field or method designated by this handle. */
private final
String owner;
/** The name of the field or method designated by this handle. */
private final
String name;
/** The descriptor of the field or method designated by this handle. */
private final
String descriptor;
/** Whether the owner is an interface or not. */
private final boolean
isInterface;
/**
* Constructs a new field or method handle.
*
* @param tag the kind of field or method designated by this Handle. Must be {@link
* Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link
* Opcodes#H_PUTSTATIC}, {@link Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC},
* {@link Opcodes#H_INVOKESPECIAL}, {@link Opcodes#H_NEWINVOKESPECIAL} or {@link
* Opcodes#H_INVOKEINTERFACE}.
* @param owner the internal name of the class that owns the field or method designated by this
* handle.
* @param name the name of the field or method designated by this handle.
* @param descriptor the descriptor of the field or method designated by this handle.
* @deprecated this constructor has been superseded by {@link #Handle(int, String, String, String,
* boolean)}.
*/
@
Deprecated
public
Handle(final int
tag, final
String owner, final
String name, final
String descriptor) {
this(
tag,
owner,
name,
descriptor,
tag ==
Opcodes.
H_INVOKEINTERFACE);
}
/**
* Constructs a new field or method handle.
*
* @param tag the kind of field or method designated by this Handle. Must be {@link
* Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link
* Opcodes#H_PUTSTATIC}, {@link Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC},
* {@link Opcodes#H_INVOKESPECIAL}, {@link Opcodes#H_NEWINVOKESPECIAL} or {@link
* Opcodes#H_INVOKEINTERFACE}.
* @param owner the internal name of the class that owns the field or method designated by this
* handle.
* @param name the name of the field or method designated by this handle.
* @param descriptor the descriptor of the field or method designated by this handle.
* @param isInterface whether the owner is an interface or not.
*/
public
Handle(
final int
tag,
final
String owner,
final
String name,
final
String descriptor,
final boolean
isInterface) {
this.
tag =
tag;
this.
owner =
owner;
this.
name =
name;
this.
descriptor =
descriptor;
this.
isInterface =
isInterface;
}
/**
* Returns the kind of field or method designated by this handle.
*
* @return {@link Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD},
* {@link Opcodes#H_PUTSTATIC}, {@link Opcodes#H_INVOKEVIRTUAL}, {@link
* Opcodes#H_INVOKESTATIC}, {@link Opcodes#H_INVOKESPECIAL}, {@link
* Opcodes#H_NEWINVOKESPECIAL} or {@link Opcodes#H_INVOKEINTERFACE}.
*/
public int
getTag() {
return
tag;
}
/**
* Returns the internal name of the class that owns the field or method designated by this handle.
*
* @return the internal name of the class that owns the field or method designated by this handle.
*/
public
String getOwner() {
return
owner;
}
/**
* Returns the name of the field or method designated by this handle.
*
* @return the name of the field or method designated by this handle.
*/
public
String getName() {
return
name;
}
/**
* Returns the descriptor of the field or method designated by this handle.
*
* @return the descriptor of the field or method designated by this handle.
*/
public
String getDesc() {
return
descriptor;
}
/**
* Returns true if the owner of the field or method designated by this handle is an interface.
*
* @return true if the owner of the field or method designated by this handle is an interface.
*/
public boolean
isInterface() {
return
isInterface;
}
@
Override
public boolean
equals(final
Object object) {
if (
object == this) {
return true;
}
if (!(
object instanceof
Handle)) {
return false;
}
Handle handle = (
Handle)
object;
return
tag ==
handle.
tag
&&
isInterface ==
handle.
isInterface
&&
owner.
equals(
handle.
owner)
&&
name.
equals(
handle.
name)
&&
descriptor.
equals(
handle.
descriptor);
}
@
Override
public int
hashCode() {
return
tag
+ (
isInterface ? 64 : 0)
+
owner.
hashCode() *
name.
hashCode() *
descriptor.
hashCode();
}
/**
* Returns the textual representation of this handle. The textual representation is:
*
* <ul>
* <li>for a reference to a class: owner "." name descriptor " (" tag ")",
* <li>for a reference to an interface: owner "." name descriptor " (" tag " itf)".
* </ul>
*/
@
Override
public
String toString() {
return
owner + '.' +
name +
descriptor + " (" +
tag + (
isInterface ? " itf" : "") + ')';
}
}