Clover coverage report - Ant Coverage
Coverage timestamp: Tue Apr 8 2003 20:43:55 EST
file stats: LOC: 161   Methods: 2
NCLOC: 71   Classes: 2
 
 Source file Conditionals Statements Methods TOTAL
ClassNameReader.java 0% 0% 0% 0%
 1   
 /*
 2   
  * The Apache Software License, Version 1.1
 3   
  *
 4   
  * Copyright (c) 2000,2002 The Apache Software Foundation.  All rights
 5   
  * reserved.
 6   
  *
 7   
  * Redistribution and use in source and binary forms, with or without
 8   
  * modification, are permitted provided that the following conditions
 9   
  * are met:
 10   
  *
 11   
  * 1. Redistributions of source code must retain the above copyright
 12   
  *    notice, this list of conditions and the following disclaimer.
 13   
  *
 14   
  * 2. Redistributions in binary form must reproduce the above copyright
 15   
  *    notice, this list of conditions and the following disclaimer in
 16   
  *    the documentation and/or other materials provided with the
 17   
  *    distribution.
 18   
  *
 19   
  * 3. The end-user documentation included with the redistribution, if
 20   
  *    any, must include the following acknowlegement:
 21   
  *       "This product includes software developed by the
 22   
  *        Apache Software Foundation (http://www.apache.org/)."
 23   
  *    Alternately, this acknowlegement may appear in the software itself,
 24   
  *    if and wherever such third-party acknowlegements normally appear.
 25   
  *
 26   
  * 4. The names "Ant" and "Apache Software
 27   
  *    Foundation" must not be used to endorse or promote products derived
 28   
  *    from this software without prior written permission. For written
 29   
  *    permission, please contact apache@apache.org.
 30   
  *
 31   
  * 5. Products derived from this software may not be called "Apache"
 32   
  *    nor may "Apache" appear in their names without prior written
 33   
  *    permission of the Apache Group.
 34   
  *
 35   
  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 36   
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 37   
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 38   
  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 39   
  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 40   
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 41   
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 42   
  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 43   
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 44   
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 45   
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 46   
  * SUCH DAMAGE.
 47   
  * ====================================================================
 48   
  *
 49   
  * This software consists of voluntary contributions made by many
 50   
  * individuals on behalf of the Apache Software Foundation.  For more
 51   
  * information on the Apache Software Foundation, please see
 52   
  * <http://www.apache.org/>.
 53   
  */
 54   
 package org.apache.tools.ant.taskdefs.optional.jlink;
 55   
 
 56   
 import java.io.DataInput;
 57   
 import java.io.DataInputStream;
 58   
 import java.io.IOException;
 59   
 import java.io.InputStream;
 60   
 
 61   
 /**
 62   
  * Reads just enough of a class file to determine the class' full name.
 63   
  *
 64   
  * <p>Extremely minimal constant pool implementation, mainly to support extracting
 65   
  * strings from a class file.
 66   
  * @author <a href="mailto:beard@netscape.com">Patrick C. Beard</a>.
 67   
  */
 68   
 class ConstantPool {
 69   
 
 70   
     static final 
 71   
         byte UTF8 = 1, UNUSED = 2, INTEGER = 3, FLOAT = 4, LONG = 5, DOUBLE = 6,
 72   
         CLASS = 7, STRING = 8, FIELDREF = 9, METHODREF = 10,
 73   
         INTERFACEMETHODREF = 11, NAMEANDTYPE = 12;
 74   
 
 75   
     byte[] types;
 76   
 
 77   
     Object[] values;
 78   
 
 79  0
     ConstantPool(DataInput data) throws IOException {
 80  0
         super();
 81   
 
 82  0
         int count = data.readUnsignedShort();
 83  0
         types = new byte [ count ];
 84  0
         values = new Object [ count ];
 85   
         // read in all constant pool entries.
 86  0
         for (int i = 1; i < count; i++) {
 87  0
             byte type = data.readByte();
 88  0
             types[i] = type;
 89  0
             switch (type) {
 90   
             case UTF8 :
 91  0
                 values[i] = data.readUTF();
 92  0
                 break;
 93   
                                 
 94   
             case UNUSED :
 95  0
                 break;
 96   
                                 
 97   
             case INTEGER :
 98  0
                 values[i] = new Integer(data.readInt());
 99  0
                 break;
 100   
                                 
 101   
             case FLOAT :
 102  0
                 values[i] = new Float(data.readFloat());
 103  0
                 break;
 104   
                                 
 105   
             case LONG :
 106  0
                 values[i] = new Long(data.readLong());
 107  0
                 ++i;
 108  0
                 break;
 109   
                                 
 110   
             case DOUBLE :
 111  0
                 values[i] = new Double(data.readDouble());
 112  0
                 ++i;
 113  0
                 break;
 114   
                                 
 115   
             case CLASS :
 116   
             case STRING :
 117  0
                 values[i] = new Integer(data.readUnsignedShort());
 118  0
                 break;
 119   
                                 
 120   
             case FIELDREF :
 121   
             case METHODREF :
 122   
             case INTERFACEMETHODREF :
 123   
             case NAMEANDTYPE :
 124  0
                 values[i] = new Integer(data.readInt());
 125  0
                 break;
 126   
             }
 127   
         }
 128   
     }
 129   
 }
 130   
 
 131   
 /**
 132   
  * Provides a quick and dirty way to determine the true name of a class
 133   
  * given just an InputStream. Reads in just enough to perform this
 134   
  * minimal task only.
 135   
  */
 136   
 public class ClassNameReader extends Object {
 137   
 
 138  0
     public static String getClassName(InputStream input) throws IOException {
 139  0
         DataInputStream data = new DataInputStream(input);
 140   
         // verify this is a valid class file.
 141  0
         int cookie = data.readInt();
 142  0
         if (cookie != 0xCAFEBABE) {
 143  0
             return null;
 144   
         }
 145  0
         /* int version = */ data.readInt();
 146   
         // read the constant pool.
 147  0
         ConstantPool constants = new ConstantPool(data);
 148  0
         Object[] values = constants.values;
 149   
         // read access flags and class index.
 150  0
         /* int accessFlags = */ data.readUnsignedShort();
 151  0
         int classIndex = data.readUnsignedShort();
 152  0
         Integer stringIndex = (Integer) values[classIndex];
 153  0
         String className = (String) values[stringIndex.intValue()];
 154  0
         return className;
 155   
     }
 156   
 
 157   
 
 158   
 }
 159   
 
 160   
 
 161