org.evosuite.instrumentation.testability.StringBooleanInterpreter Maven / Gradle / Ivy

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/**
 * Copyright (C) 2010-2018 Gordon Fraser, Andrea Arcuri and EvoSuite
 * contributors
 *
 * This file is part of EvoSuite.
 *
 * EvoSuite is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3.0 of the License, or
 * (at your option) any later version.
 *
 * EvoSuite is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with EvoSuite. If not, see .
 */
/**
 * 
 */
package org.evosuite.instrumentation.testability;

import java.util.List;

import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.tree.AbstractInsnNode;
import org.objectweb.asm.tree.MethodInsnNode;
import org.objectweb.asm.tree.analysis.AnalyzerException;
import org.objectweb.asm.tree.analysis.BasicInterpreter;
import org.objectweb.asm.tree.analysis.BasicValue;

/**
 * StringBooleanInterpreter class.
 *
 * @author Gordon Fraser
 */
public class StringBooleanInterpreter extends BasicInterpreter {

	/** Constant STRING_BOOLEAN */
	public final static BasicValue STRING_BOOLEAN = new BasicValue(null);

	/* (non-Javadoc)
	 * @see org.objectweb.asm.tree.analysis.BasicInterpreter#naryOperation(org.objectweb.asm.tree.AbstractInsnNode, java.util.List)
	 */
	/** {@inheritDoc} */
	@Override
	public BasicValue naryOperation(AbstractInsnNode insn,
	        @SuppressWarnings("rawtypes") List values) throws AnalyzerException {
		if (insn.getOpcode() == Opcodes.INVOKESTATIC) {
			MethodInsnNode mn = (MethodInsnNode) insn;
			if (mn.owner.equals(Type.getInternalName(StringHelper.class))
			        && mn.name.startsWith("String")) {
				return STRING_BOOLEAN;
			}
		}
		return super.naryOperation(insn, values);
	}

}