91 lines
2.0 KiB
Java
91 lines
2.0 KiB
Java
/*******************************************************************************
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* Copyright (c) 2002,2006 IBM Corporation.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package com.ibm.wala.shrikeBT;
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/**
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* This class represents checkcast instructions.
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*/
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final public class CheckCastInstruction extends Instruction implements ITypeTestInstruction {
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final private String type;
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protected CheckCastInstruction(String type) {
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super(OP_checkcast);
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this.type = type;
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}
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public static CheckCastInstruction make(String type) {
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if (type == null) {
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throw new IllegalArgumentException("type is null");
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}
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return new CheckCastInstruction(type.intern());
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}
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@Override
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public boolean equals(Object o) {
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if (o instanceof CheckCastInstruction) {
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CheckCastInstruction i = (CheckCastInstruction) o;
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return i.type.equals(type);
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} else {
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return false;
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}
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}
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@Override
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public int hashCode() {
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return 131111 + type.hashCode();
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}
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@Override
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public int getPoppedCount() {
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return 1;
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}
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/**
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* @return the type to which the operand is cast
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*/
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@Override
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public String[] getTypes() {
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return new String[]{ type };
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}
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@Override
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public String getPushedType(String[] types) {
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return type;
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}
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@Override
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public byte getPushedWordSize() {
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return 1;
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}
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@Override
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public void visit(IInstruction.Visitor v) {
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if (v == null) {
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throw new IllegalArgumentException();
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}
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v.visitCheckCast(this);
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}
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@Override
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public String toString() {
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return "CheckCast(" + type + ")";
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}
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@Override
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public boolean isPEI() {
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return true;
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}
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@Override
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public boolean firstClassTypes() {
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return false;
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}
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} |