| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000-2002 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 acknowlegement: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowlegement may appear in the software itself, |
| * if and wherever such third-party acknowlegements normally appear. |
| * |
| * 4. The names "The Jakarta Project", "Ant", and "Apache Software |
| * Foundation" 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" |
| * nor may "Apache" appear in their names without prior written |
| * permission of the Apache Group. |
| * |
| * 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/>. |
| */ |
| package org.apache.tools.ant.taskdefs.optional.depend; |
| |
| import java.io.DataInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Vector; |
| |
| import org.apache.tools.ant.taskdefs.optional.depend.constantpool.ClassCPInfo; |
| import org.apache.tools.ant.taskdefs.optional.depend.constantpool.ConstantPool; |
| import org.apache.tools.ant.taskdefs.optional.depend.constantpool.ConstantPoolEntry; |
| |
| /** |
| * A ClassFile object stores information about a Java class. The class may |
| * be read from a DataInputStream.and written to a DataOutputStream. These |
| * are usually streams from a Java class file or a class file component of a |
| * Jar file. |
| * |
| * @author Conor MacNeill |
| */ |
| public class ClassFile { |
| |
| /** The Magic Value that marks the start of a Java class file */ |
| private final static int CLASS_MAGIC = 0xCAFEBABE; |
| |
| /** This class' constant pool. */ |
| private ConstantPool constantPool; |
| |
| /** The class name for this class. */ |
| private String className; |
| |
| /** |
| * Read the class from a data stream. This method takes an InputStream |
| * as input and parses the class from the stream. <p> |
| * |
| * |
| * |
| * @param stream an InputStream from which the class will be read |
| * @exception IOException if there is a problem reading from the given |
| * stream. |
| * @exception ClassFormatError if the class cannot be parsed correctly |
| */ |
| public void read(InputStream stream) throws IOException, ClassFormatError { |
| DataInputStream classStream = new DataInputStream(stream); |
| |
| if (classStream.readInt() != CLASS_MAGIC) { |
| throw new ClassFormatError("No Magic Code Found " |
| + "- probably not a Java class file."); |
| } |
| |
| // right we have a good looking class file. |
| int minorVersion = classStream.readUnsignedShort(); |
| int majorVersion = classStream.readUnsignedShort(); |
| |
| // read the constant pool in and resolve it |
| constantPool = new ConstantPool(); |
| |
| constantPool.read(classStream); |
| constantPool.resolve(); |
| |
| int accessFlags = classStream.readUnsignedShort(); |
| int thisClassIndex = classStream.readUnsignedShort(); |
| int superClassIndex = classStream.readUnsignedShort(); |
| ClassCPInfo classInfo |
| = (ClassCPInfo)constantPool.getEntry(thisClassIndex); |
| className = classInfo.getClassName(); |
| } |
| |
| |
| /** |
| * Get the classes which this class references. |
| * |
| * @return a vector of class names which this class references |
| */ |
| public Vector getClassRefs() { |
| |
| Vector classRefs = new Vector(); |
| |
| for (int i = 0; i < constantPool.size(); ++i) { |
| ConstantPoolEntry entry = constantPool.getEntry(i); |
| |
| if (entry != null |
| && entry.getTag() == ConstantPoolEntry.CONSTANT_CLASS) { |
| ClassCPInfo classEntry = (ClassCPInfo)entry; |
| |
| if (!classEntry.getClassName().equals(className)) { |
| classRefs.addElement(ClassFileUtils.convertSlashName(classEntry.getClassName())); |
| } |
| } |
| } |
| |
| return classRefs; |
| } |
| |
| /** |
| * Get the class' fully qualified name in dot format. |
| * |
| * @return the class name in dot format (eg. java.lang.Object) |
| */ |
| public String getFullClassName() { |
| return ClassFileUtils.convertSlashName(className); |
| } |
| } |
| |