161 lines
4.9 KiB
Java
161 lines
4.9 KiB
Java
/*
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* 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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* This file is a derivative of code released under the terms listed below.
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*
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*/
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/**
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*
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* Copyright (c) 2009-2012,
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*
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* Adam Fuchs <afuchs@cs.umd.edu>
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* Avik Chaudhuri <avik@cs.umd.edu>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. The names of the contributors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*
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*/
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package org.scandroid.flow.types;
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import com.ibm.wala.ipa.cfg.BasicBlockInContext;
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import com.ibm.wala.ssa.ISSABasicBlock;
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/**
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* Flow types represent specific instances of sources or sinks.
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*
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* In contrast to the Source/Sink specs, these have ties to specific locations
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* in the source.
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*
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* @author creswick
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*/
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public abstract class FlowType<E extends ISSABasicBlock> {
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private final BasicBlockInContext<E> block;
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private final boolean source;
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protected FlowType(BasicBlockInContext<E> block, boolean source) {
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this.block = block;
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this.source = source;
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}
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public final BasicBlockInContext<E> getBlock() {
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return block;
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}
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public final boolean isSource() {
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return source;
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}
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@Override
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public String toString() {
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return "block=" + block + ", source=" + source + ", desc=" + descString();
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}
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public String descString() {
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if(source)
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return "I";
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else
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return "O";
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}
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@Override
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public int hashCode() {
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final int prime = 31;
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int result = 1;
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result = prime * result + ((block == null) ? 0 : block.getNumber());
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result = prime * result + (source ? 1231 : 1237);
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return result;
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj)
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return true;
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if (obj == null)
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return false;
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if (getClass() != obj.getClass())
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return false;
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@SuppressWarnings("unchecked")
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FlowType<E> other = (FlowType<E>) obj;
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if (block == null) {
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if (other.block != null)
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return false;
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} else if (block.getNumber() != other.block.getNumber()) {
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return false;
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}
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if (source != other.source)
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return false;
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return true;
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}
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/**
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* custom comparison for BasicBlockInContext. The WALA .equals()
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* implementation eventually delegates to pointer equality, which is too
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* specific for our needs.
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*
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* @param a
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* @param b
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* @return
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*/
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@SuppressWarnings("unused")
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private boolean compareBlocks(BasicBlockInContext<E> a,
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BasicBlockInContext<E> b) {
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if (null == a || null == b) {
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return false;
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}
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// delegate to the defined implementation, but only if it's true.
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if (a.equals(b)) {
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return true;
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}
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if (a.getNumber() != b.getNumber()) {
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return false;
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}
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if (!a.getMethod().getSignature().equals(b.getMethod().getSignature())) {
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return false;
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}
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return true;
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}
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public abstract <R> R visit(FlowTypeVisitor<E, R> v);
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public static interface FlowTypeVisitor<E extends ISSABasicBlock, R> {
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R visitFieldFlow(FieldFlow<E> flow);
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R visitIKFlow(IKFlow<E> flow);
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R visitParameterFlow(ParameterFlow<E> flow);
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R visitReturnFlow(ReturnFlow<E> flow);
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R visitStaticFieldFlow(StaticFieldFlow<E> flow);
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}
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}
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