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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 scala.tools.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}.
*/
final int tag;
/**
* The internal name of the field or method designed by this handle.
*/
final String owner;
/**
* The name of the field or method designated by this handle.
*/
final String name;
/**
* The descriptor of the field or method designated by this handle.
*/
final String desc;
/**
* 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 field or method designed by this
* handle.
* @param name the name of the field or method designated by this handle.
* @param desc the descriptor of the field or method designated by this
* handle.
*/
public Handle(int tag, String owner, String name, String desc) {
this.tag = tag;
this.owner = owner;
this.name = name;
this.desc = desc;
}
/**
* 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 field or method designed by this
* handle.
*
* @return the internal name of the field or method designed 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 desc;
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof Handle)) {
return false;
}
Handle h = (Handle) obj;
return tag == h.tag && owner.equals(h.owner)
&& name.equals(h.name) && desc.equals(h.desc);
}
@Override
public int hashCode() {
return tag + owner.hashCode() * name.hashCode() * desc.hashCode();
}
/**
* Returns the textual representation of this handle. The textual
* representation is: <pre>owner '.' name desc ' ' '(' tag ')'</pre>. As
* this format is unambiguous, it can be parsed if necessary.
*/
@Override
public String toString() {
return owner + '.' + name + desc + " (" + tag + ')';
}
}
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