/** * Copyright (C) 2010-2017 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 <http://www.gnu.org/licenses/>. */ package org.evosuite.symbolic.vm.string.tokenizer; import java.util.StringTokenizer; import org.evosuite.symbolic.expr.ref.ReferenceConstant; import org.evosuite.symbolic.expr.token.NextTokenizerExpr; import org.evosuite.symbolic.expr.token.StringNextTokenExpr; import org.evosuite.symbolic.expr.token.TokenizerExpr; import org.evosuite.symbolic.vm.SymbolicEnvironment; import org.evosuite.symbolic.vm.SymbolicFunction; import org.evosuite.symbolic.vm.SymbolicHeap; import org.evosuite.symbolic.vm.string.Types; public final class NextToken extends SymbolicFunction { private static final String NEXT_TOKEN = "nextToken"; public NextToken(SymbolicEnvironment env) { super(env, Types.JAVA_UTIL_STRING_TOKENIZER, NEXT_TOKEN, Types.TO_STR_DESCRIPTOR); } @Override public Object executeFunction() { ReferenceConstant symb_receiver = this.getSymbReceiver(); StringTokenizer conc_receiver = (StringTokenizer) this .getConcReceiver(); TokenizerExpr tokenizerExpr = (TokenizerExpr) env.heap.getField( Types.JAVA_UTIL_STRING_TOKENIZER, SymbolicHeap.$STRING_TOKENIZER_VALUE, conc_receiver, symb_receiver); if (tokenizerExpr != null && tokenizerExpr.containsSymbolicVariable()) { ReferenceConstant symb_ret_val = (ReferenceConstant) this .getSymbRetVal(); String conc_ret_val = (String) this.getConcRetVal(); // create new NEXT_TOKEN string expression StringNextTokenExpr string_next_token_expr = new StringNextTokenExpr( tokenizerExpr, conc_ret_val); env.heap.putField(Types.JAVA_LANG_STRING, SymbolicHeap.$STRING_VALUE, conc_ret_val, symb_ret_val, string_next_token_expr); // update StringTokenizer's symbolic state NextTokenizerExpr nextTokenizerExpr = new NextTokenizerExpr( tokenizerExpr); env.heap.putField(Types.JAVA_UTIL_STRING_TOKENIZER, SymbolicHeap.$STRING_TOKENIZER_VALUE, conc_receiver, symb_receiver, nextTokenizerExpr); } return this.getSymbRetVal(); } }