51 lines
1.5 KiB
Java
51 lines
1.5 KiB
Java
package com.ibm.wala.ipa.cfg.exceptionpruning.filter;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.LinkedList;
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import com.ibm.wala.analysis.arraybounds.ArrayOutOfBoundsAnalysis;
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import com.ibm.wala.analysis.arraybounds.ArrayOutOfBoundsAnalysis.UnnecessaryCheck;
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import com.ibm.wala.ipa.cfg.exceptionpruning.ExceptionFilter;
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import com.ibm.wala.ipa.cfg.exceptionpruning.FilteredException;
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import com.ibm.wala.ssa.SSAInstruction;
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import com.ibm.wala.types.TypeReference;
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/**
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* Adapter for using {@link ArrayOutOfBoundsAnalysis}. This filter is filtering
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* ArrayOutOfBoundException, which can not occur.
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*
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* @author Stephan Gocht {@code <stephan@gobro.de>}
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*
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*/
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public class ArrayOutOfBoundFilter implements ExceptionFilter<SSAInstruction> {
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private final ArrayOutOfBoundsAnalysis analysis;
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public ArrayOutOfBoundFilter(ArrayOutOfBoundsAnalysis analysis) {
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this.analysis = analysis;
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}
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@Override
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public boolean alwaysThrowsException(SSAInstruction instruction) {
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return false;
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}
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@Override
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public Collection<FilteredException> filteredExceptions(
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SSAInstruction instruction) {
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final UnnecessaryCheck unnecessary = this.analysis
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.getBoundsCheckNecessary().get(instruction);
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if (unnecessary == UnnecessaryCheck.BOTH) {
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final LinkedList<FilteredException> result = new LinkedList<FilteredException>();
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result.add(new FilteredException(
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TypeReference.JavaLangArrayIndexOutOfBoundsException));
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return result;
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} else {
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return Collections.emptyList();
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}
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}
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}
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