79 lines
2.5 KiB
Plaintext
79 lines
2.5 KiB
Plaintext
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package org.apache.commons.bcel6.generic;
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import org.apache.commons.bcel6.ExceptionConst;
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/**
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* INSTANCEOF - Determine if object is of given type
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* <PRE>Stack: ..., objectref -> ..., result</PRE>
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*
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* @version $Id$
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*/
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public class INSTANCEOF extends CPInstruction implements LoadClass, ExceptionThrower,
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StackProducer, StackConsumer {
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/**
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* Empty constructor needed for the Class.newInstance() statement in
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* Instruction.readInstruction(). Not to be used otherwise.
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*/
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INSTANCEOF() {
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}
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public INSTANCEOF(int index) {
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super(org.apache.commons.bcel6.Const.INSTANCEOF, index);
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}
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@Override
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public Class<?>[] getExceptions() {
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return ExceptionConst.createExceptions(ExceptionConst.EXCS.EXCS_CLASS_AND_INTERFACE_RESOLUTION);
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}
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@Override
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public ObjectType getLoadClassType( ConstantPoolGen cpg ) {
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Type t = getType(cpg);
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if (t instanceof ArrayType) {
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t = ((ArrayType) t).getBasicType();
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}
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return (t instanceof ObjectType) ? (ObjectType) t : null;
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}
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/**
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* Call corresponding visitor method(s). The order is:
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* Call visitor methods of implemented interfaces first, then
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* call methods according to the class hierarchy in descending order,
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* i.e., the most specific visitXXX() call comes last.
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*
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* @param v Visitor object
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*/
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@Override
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public void accept( Visitor v ) {
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v.visitLoadClass(this);
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v.visitExceptionThrower(this);
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v.visitStackProducer(this);
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v.visitStackConsumer(this);
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v.visitTypedInstruction(this);
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v.visitCPInstruction(this);
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v.visitINSTANCEOF(this);
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}
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}
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