- package com.sun.org.apache.bcel.internal.generic;
-
- /* ====================================================================
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2001 The Apache Software Foundation. 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. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Apache" and "Apache Software Foundation" and
- * "Apache BCEL" must not be used to endorse or promote products
- * derived from this software without prior written permission. For
- * written permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * "Apache BCEL", nor may "Apache" appear in their name, without
- * prior written permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
- * ITS 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.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- import com.sun.org.apache.bcel.internal.classfile.ConstantPool;
- import com.sun.org.apache.bcel.internal.Constants;
- import com.sun.org.apache.bcel.internal.ExceptionConstants;
-
- import java.io.*;
- import com.sun.org.apache.bcel.internal.util.ByteSequence;
-
- /**
- * INVOKEINTERFACE - Invoke interface method
- * <PRE>Stack: ..., objectref, [arg1, [arg2 ...]] -> ...</PRE>
- *
- * @version $Id: INVOKEINTERFACE.java,v 1.1.1.1 2001/10/29 20:00:16 jvanzyl Exp $
- * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
- */
- public final class INVOKEINTERFACE extends InvokeInstruction {
- private int nargs; // Number of arguments on stack (number of stack slots), called "count" in vmspec2
-
- /**
- * Empty constructor needed for the Class.newInstance() statement in
- * Instruction.readInstruction(). Not to be used otherwise.
- */
- INVOKEINTERFACE() {}
-
- public INVOKEINTERFACE(int index, int nargs) {
- super(Constants.INVOKEINTERFACE, index);
- length = 5;
-
- if(nargs < 1)
- throw new ClassGenException("Number of arguments must be > 0 " + nargs);
-
- this.nargs = nargs;
- }
-
- /**
- * Dump instruction as byte code to stream out.
- * @param out Output stream
- */
- public void dump(DataOutputStream out) throws IOException {
- out.writeByte(opcode);
- out.writeShort(index);
- out.writeByte(nargs);
- out.writeByte(0);
- }
-
- /**
- * The <B>count</B> argument according to the Java Language Specification,
- * Second Edition.
- */
- public int getCount() { return nargs; }
-
- /**
- * Read needed data (i.e., index) from file.
- */
- protected void initFromFile(ByteSequence bytes, boolean wide)
- throws IOException
- {
- super.initFromFile(bytes, wide);
-
- length = 5;
- nargs = bytes.readUnsignedByte();
- bytes.readByte(); // Skip 0 byte
- }
-
- /**
- * @return mnemonic for instruction with symbolic references resolved
- */
- public String toString(ConstantPool cp) {
- return super.toString(cp) + " " + nargs;
- }
-
- public int consumeStack(ConstantPoolGen cpg) { // nargs is given in byte-code
- return nargs; // nargs includes this reference
- }
-
- public Class[] getExceptions() {
- Class[] cs = new Class[4 + ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length];
-
- System.arraycopy(ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION, 0,
- cs, 0, ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length);
-
- cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length+3] = ExceptionConstants.INCOMPATIBLE_CLASS_CHANGE_ERROR;
- cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length+2] = ExceptionConstants.ILLEGAL_ACCESS_ERROR;
- cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length+1] = ExceptionConstants.ABSTRACT_METHOD_ERROR;
- cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length] = ExceptionConstants.UNSATISFIED_LINK_ERROR;
-
- return cs;
- }
-
- /**
- * Call corresponding visitor method(s). The order is:
- * Call visitor methods of implemented interfaces first, then
- * call methods according to the class hierarchy in descending order,
- * i.e., the most specific visitXXX() call comes last.
- *
- * @param v Visitor object
- */
- public void accept(Visitor v) {
- v.visitExceptionThrower(this);
- v.visitTypedInstruction(this);
- v.visitStackConsumer(this);
- v.visitStackProducer(this);
- v.visitLoadClass(this);
- v.visitCPInstruction(this);
- v.visitFieldOrMethod(this);
- v.visitInvokeInstruction(this);
- v.visitINVOKEINTERFACE(this);
- }
- }