mdahm 2002/11/09 09:09:04
Modified: src/java/org/apache/bcel/util ClassQueue.java
Added: examples TransitiveHull.java
src/java/org/apache/bcel/util ClassSet.java
Log:
New TransitiveHull example, may be extended soon
Revision Changes Path
1.1 jakarta-bcel/examples/TransitiveHull.java
Index: TransitiveHull.java
===================================================================
import org.apache.bcel.classfile.*;
import org.apache.bcel.generic.*;
import org.apache.bcel.util.*;
import java.io.*;
import java.util.*;
import org.apache.bcel.Constants;
import org.apache.bcel.Repository;
/**
* Find all classes referenced by given start class and all classes
* referenced by tjose and so on. In other words: Compute the tranitive
* hull of classes used by a given class. This is done by checking all
* ConstantClass entries and all method and field signatures.<br> This
* may be useful in order to put all class files of an application
* into a single JAR file.
* <p>
* It fails however in the presence of reflection code.
*
* @version $Id: TransitiveHull.java,v 1.1 2002/11/09 17:09:03 mdahm Exp $
* @author <A HREF="mailto:[email protected]">M. Dahm</A>
*/
public class TransitiveHull extends org.apache.bcel.classfile.EmptyVisitor {
private JavaClass _class;
private ClassQueue _queue;
private ClassSet _set;
private ConstantPool _cp;
private String[] _ignored = {
"java[.].*",
"javax[.].*",
"com[.]sun[.].*"
};
public TransitiveHull(JavaClass clazz) {
_queue = new ClassQueue();
_queue.enqueue(clazz);
_set = new ClassSet();
_set.add(clazz);
}
public JavaClass[] getClasses() {
return _set.toArray();
}
public String[] getClassNames() {
return _set.getClassNames();
}
/**
* Start traversal using DescendingVisitor pattern.
*/
public void start() {
while(!_queue.empty()) {
JavaClass clazz = _queue.dequeue();
_class = clazz;
_cp = clazz.getConstantPool();
new org.apache.bcel.classfile.DescendingVisitor(clazz, this).visit();
}
}
private void add(String class_name) {
class_name = class_name.replace('/', '.');
for(int i = 0; i < _ignored.length; i++) {
if(class_name.matches(_ignored[i])) {
return; // Ihh
}
}
JavaClass clazz = Repository.lookupClass(class_name);
if(clazz != null && _set.add(clazz)) {
_queue.enqueue(clazz);
}
}
public void visitConstantClass(ConstantClass cc) {
String class_name = (String)cc.getConstantValue(_cp);
add(class_name);
}
private void visitRef(ConstantCP ccp, boolean method) {
String class_name = ccp.getClass(_cp);
add(class_name);
ConstantNameAndType cnat = (ConstantNameAndType)_cp.
getConstant(ccp.getNameAndTypeIndex(), Constants.CONSTANT_NameAndType);
String signature = cnat.getSignature(_cp);
if(method) {
Type type = Type.getReturnType(signature);
if(type instanceof ObjectType) {
add(((ObjectType)type).getClassName());
}
Type[] types = Type.getArgumentTypes(signature);
for(int i = 0; i < types.length; i++) {
type = types[i];
if(type instanceof ObjectType) {
add(((ObjectType)type).getClassName());
}
}
} else {
Type type = Type.getType(signature);
if(type instanceof ObjectType) {
add(((ObjectType)type).getClassName());
}
}
}
public void visitConstantMethodref(ConstantMethodref cmr) {
visitRef(cmr, true);
}
public void visitConstantInterfaceMethodref(ConstantInterfaceMethodref cimr) {
visitRef(cimr, true);
}
public void visitConstantFieldref(ConstantFieldref cfr) {
visitRef(cfr, false);
}
public static void main(String[] argv) {
ClassParser parser=null;
JavaClass java_class;
try {
if(argv.length == 0) {
System.err.println("transitive: No input files specified");
}
else {
if((java_class = Repository.lookupClass(argv[0])) == null) {
java_class = new ClassParser(argv[0]).parse();
}
TransitiveHull hull = new TransitiveHull(java_class);
hull.start();
System.out.println(Arrays.asList(hull.getClassNames()));
}
} catch(Exception e) {
e.printStackTrace();
}
}
}
1.4 +3 -3 jakarta-bcel/src/java/org/apache/bcel/util/ClassQueue.java
Index: ClassQueue.java
===================================================================
RCS file: /home/cvs/jakarta-bcel/src/java/org/apache/bcel/util/ClassQueue.java,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -r1.3 -r1.4
--- ClassQueue.java 11 Jul 2002 19:39:05 -0000 1.3
+++ ClassQueue.java 9 Nov 2002 17:09:03 -0000 1.4
@@ -53,7 +53,7 @@
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
-import java.util.ArrayList;
+import java.util.LinkedList;
import org.apache.bcel.classfile.JavaClass;
/**
@@ -65,7 +65,7 @@
* @see ClassVector
*/
public class ClassQueue implements java.io.Serializable {
- protected ArrayList vec = new ArrayList();
+ protected LinkedList vec = new LinkedList();
public void enqueue(JavaClass clazz) { vec.add(clazz); }
1.1 jakarta-bcel/src/java/org/apache/bcel/util/ClassSet.java
Index: ClassSet.java
===================================================================
package org.apache.bcel.util;
/* ====================================================================
* 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 [email protected].
*
* 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 java.util.HashMap;
import java.util.Collection;
import org.apache.bcel.classfile.JavaClass;
/**
* Utility class implementing a (typesafe) set of JavaClass objects.
* Since JavaClass has no equals() method, the name of the class is
* used for comparison.
*
* @version $Id: ClassSet.java,v 1.1 2002/11/09 17:09:03 mdahm Exp $
* @author <A HREF="mailto:[email protected]">M. Dahm</A>
* @see Stack
*/
public class ClassSet implements java.io.Serializable {
private HashMap _map = new HashMap();
public boolean add(JavaClass clazz) {
boolean result = false;
if(!_map.containsKey(clazz.getClassName())) {
result = true;
_map.put(clazz.getClassName(), clazz);
}
return result;
}
public void remove(JavaClass clazz) { _map.remove(clazz.getClassName()); }
public boolean empty() { return _map.isEmpty(); }
public JavaClass[] toArray() {
Collection values = _map.values();
JavaClass[] classes = new JavaClass[values.size()];
values.toArray(classes);
return classes;
}
public String[] getClassNames() {
return (String[])_map.keySet().toArray(new String[_map.keySet().size()]);
}
}
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