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1: /* JarEntry.java - Represents an entry in a jar file 2: Copyright (C) 2000, 2006 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: package java.util.jar; 39: 40: import java.io.IOException; 41: import java.security.cert.Certificate; 42: import java.util.Set; 43: import java.util.zip.ZipEntry; 44: 45: /** 46: * Extension to a ZipEntry that contains manifest attributes and certificates. 47: * Both the Atrributes and the Certificates can be null when not set. 48: * Note that the <code>getCertificates()</code> method only returns a 49: * valid value after all of the data of the entry has been read. 50: * <p> 51: * There are no public methods to set the attributes or certificate of an 52: * Entru. Only JarEntries created by the classes in <code>java.util.jar</code> 53: * will have these properties set. 54: * 55: * @since 1.2 56: * @author Mark Wielaard (mark@klomp.org) 57: */ 58: 59: public class JarEntry extends ZipEntry 60: { 61: // (Package local) fields 62: 63: Attributes attr; 64: JarFile jarfile; 65: 66: // Constructors 67: 68: /** 69: * Creates a new JarEntry with the specified name and no attributes or 70: * or certificates. Calls <code>super(name)</code> so all other (zip)entry 71: * fields are null or -1. 72: * 73: * @param name the name of the new jar entry 74: * @exception NullPointerException when the supplied name is null 75: * @exception IllegalArgumentException when the supplied name is longer 76: * than 65535 bytes 77: */ 78: public JarEntry(String name) throws NullPointerException, 79: IllegalArgumentException 80: { 81: super(name); 82: attr = null; 83: jarfile = null; 84: } 85: 86: /** 87: * Creates a new JarEntry with the specified ZipEntry as template for 88: * all properties of the entry. Both attributes and certificates will be 89: * null. 90: * 91: * @param entry the ZipEntry whose fields should be copied 92: */ 93: public JarEntry(ZipEntry entry) 94: { 95: super(entry); 96: attr = null; 97: jarfile = null; 98: } 99: 100: /** 101: * Creates a new JarEntry with the specified JarEntry as template for 102: * all properties of the entry. 103: * 104: * @param entry the jarEntry whose fields should be copied 105: */ 106: public JarEntry(JarEntry entry) 107: { 108: super(entry); 109: try 110: { 111: attr = entry.getAttributes(); 112: } 113: catch (IOException _) 114: { 115: } 116: jarfile = entry.jarfile; 117: } 118: 119: // Methods 120: 121: /** 122: * Returns a copy of the Attributes set for this entry. 123: * When no Attributes are set in the manifest null is returned. 124: * 125: * @return a copy of the Attributes set for this entry 126: * @exception IOException This will never be thrown. It is here for 127: * binary compatibility. 128: */ 129: public Attributes getAttributes() throws IOException 130: { 131: if (attr != null) 132: { 133: return (Attributes) attr.clone(); 134: } 135: else 136: { 137: return null; 138: } 139: } 140: 141: /** 142: * Returns a copy of the certificates set for this entry. 143: * When no certificates are set or when not all data of this entry has 144: * been read null is returned. 145: * <p> 146: * To make sure that this call returns a valid value you must read all 147: * data from the JarInputStream for this entry. 148: * When you don't need the data for an entry but want to know the 149: * certificates that are set for the entry then you can skip all data by 150: * calling <code>skip(entry.getSize())</code> on the JarInputStream for 151: * the entry. 152: * 153: * @return a copy of the certificates set for this entry 154: */ 155: public Certificate[] getCertificates() 156: { 157: if (jarfile != null) 158: { 159: synchronized (jarfile) 160: { 161: if (jarfile.entryCerts != null) 162: { 163: Set certs = (Set) jarfile.entryCerts.get(getName()); 164: if (certs != null 165: && jarfile.verified.get(getName()) == Boolean.TRUE) 166: return (Certificate[]) certs.toArray(new Certificate[certs.size()]); 167: } 168: } 169: } 170: return null; 171: } 172: }