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Diffstat (limited to 'src/share/classes/com/sun/org/apache/bcel/internal/generic/GETFIELD.java')
-rw-r--r-- | src/share/classes/com/sun/org/apache/bcel/internal/generic/GETFIELD.java | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/src/share/classes/com/sun/org/apache/bcel/internal/generic/GETFIELD.java b/src/share/classes/com/sun/org/apache/bcel/internal/generic/GETFIELD.java new file mode 100644 index 0000000..139f139 --- /dev/null +++ b/src/share/classes/com/sun/org/apache/bcel/internal/generic/GETFIELD.java @@ -0,0 +1,120 @@ +/* + * reserved comment block + * DO NOT REMOVE OR ALTER! + */ +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.Constants; +import com.sun.org.apache.bcel.internal.ExceptionConstants; + +/** + * GETFIELD - Fetch field from object + * <PRE>Stack: ..., objectref -> ..., value</PRE> + * OR + * <PRE>Stack: ..., objectref -> ..., value.word1, value.word2</PRE> + * + * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> + */ +public class GETFIELD extends FieldInstruction + implements ExceptionThrower, StackConsumer, StackProducer { + /** + * Empty constructor needed for the Class.newInstance() statement in + * Instruction.readInstruction(). Not to be used otherwise. + */ + GETFIELD() {} + + public GETFIELD(int index) { + super(Constants.GETFIELD, index); + } + + public int produceStack(ConstantPoolGen cpg) { return getFieldSize(cpg); } + + public Class[] getExceptions() { + Class[] cs = new Class[2 + ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length]; + + System.arraycopy(ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION, 0, + cs, 0, ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length); + + cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length+1] = + ExceptionConstants.INCOMPATIBLE_CLASS_CHANGE_ERROR; + cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length] = + ExceptionConstants.NULL_POINTER_EXCEPTION; + + 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.visitStackConsumer(this); + v.visitStackProducer(this); + v.visitTypedInstruction(this); + v.visitLoadClass(this); + v.visitCPInstruction(this); + v.visitFieldOrMethod(this); + v.visitFieldInstruction(this); + v.visitGETFIELD(this); + } +} |