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// 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 (see {@link Type#getInternalName()}).
* @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 (see {@link Type#getInternalName()}).
* @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
* (see {@link Type#getInternalName()}).
*/
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:
*
*
*
for a reference to a class: owner "." name descriptor " (" tag ")",
*
for a reference to an interface: owner "." name descriptor " (" tag " itf)".
*
*/
@Override
public String toString() {
return owner + '.' + name + descriptor + " (" + tag + (isInterface ? " itf" : "") + ')';
}
}
