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- package org.aspectj.apache.bcel.verifier.statics;
-
- /* ====================================================================
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2001 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Apache" and "Apache Software Foundation" and
- * "Apache BCEL" must not be used to endorse or promote products
- * derived from this software without prior written permission. For
- * written permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * "Apache BCEL", nor may "Apache" appear in their name, without
- * prior written permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
-
- import org.aspectj.apache.bcel.generic.Type;
- import org.aspectj.apache.bcel.verifier.exc.*;
- import java.util.Hashtable;
-
- /**
- * A utility class holding the information about
- * the name and the type of a local variable in
- * a given slot (== index). This information
- * often changes in course of byte code offsets.
- *
- * @version $Id: LocalVariableInfo.java,v 1.3 2009/09/09 19:56:20 aclement Exp $
- * @author <A HREF="http://www.inf.fu-berlin.de/~ehaase"/>Enver Haase</A>
- */
- public class LocalVariableInfo{
-
- /** The types database. KEY: String representing the offset integer. */
- private Hashtable<String, Type> types = new Hashtable<String, Type>();
- /** The names database. KEY: String representing the offset integer. */
- private Hashtable<String, String> names = new Hashtable<String, String>();
-
- /**
- * Adds a name of a local variable and a certain slot to our 'names'
- * (Hashtable) database.
- */
- private void setName(int offset, String name){
- names.put( ((Integer.toString(offset))), name);
- }
- /**
- * Adds a type of a local variable and a certain slot to our 'types'
- * (Hashtable) database.
- */
- private void setType(int offset, Type t){
- types.put( ((Integer.toString(offset))), t);
- }
-
- /**
- * Returns the type of the local variable that uses this local
- * variable slot at the given bytecode offset.
- * Care for legal bytecode offsets yourself, otherwise the return value
- * might be wrong.
- * May return 'null' if nothing is known about the type of this local
- * variable slot at the given bytecode offset.
- */
- public Type getType(int offset){
- return types.get(Integer.toString(offset));
- }
- /**
- * Returns the name of the local variable that uses this local
- * variable slot at the given bytecode offset.
- * Care for legal bytecode offsets yourself, otherwise the return value
- * might be wrong.
- * May return 'null' if nothing is known about the type of this local
- * variable slot at the given bytecode offset.
- */
- public String getName(int offset){
- return (names.get(Integer.toString(offset)));
- }
- /**
- * Adds some information about this local variable (slot).
- * @throws LocalVariableInfoInconsistentException if the new information conflicts
- * with already gathered information.
- */
- public void add(String name, int startpc, int length, Type t) throws LocalVariableInfoInconsistentException{
- for (int i=startpc; i<=startpc+length; i++){ // incl/incl-notation!
- add(i,name,t);
- }
- }
-
- /**
- * Adds information about name and type for a given offset.
- * @throws LocalVariableInfoInconsistentException if the new information conflicts
- * with already gathered information.
- */
- private void add(int offset, String name, Type t) throws LocalVariableInfoInconsistentException{
- if (getName(offset) != null){
- if (! getName(offset).equals(name)){
- throw new LocalVariableInfoInconsistentException("At bytecode offset '"+offset+"' a local variable has two different names: '"+getName(offset)+"' and '"+name+"'.");
- }
- }
- if (getType(offset) != null){
- if (! getType(offset).equals(t)){
- throw new LocalVariableInfoInconsistentException("At bytecode offset '"+offset+"' a local variable has two different types: '"+getType(offset)+"' and '"+t+"'.");
- }
- }
- setName(offset, name);
- setType(offset, t);
- }
- }
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