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1: /* JarEntry.java - Represents an entry in a jar file 2: Copyright (C) 2000 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.zip.ZipEntry; 43: 44: /** 45: * Extension to a ZipEntry that contains manifest attributes and certificates. 46: * Both the Atrributes and the Certificates can be null when not set. 47: * Note that the <code>getCertificates()</code> method only returns a 48: * valid value after all of the data of the entry has been read. 49: * <p> 50: * There are no public methods to set the attributes or certificate of an 51: * Entru. Only JarEntries created by the classes in <code>java.util.jar</code> 52: * will have these properties set. 53: * 54: * @since 1.2 55: * @author Mark Wielaard (mark@klomp.org) 56: */ 57: 58: public class JarEntry extends ZipEntry 59: { 60: // (Package local) fields 61: 62: Attributes attr; 63: Certificate certs[]; 64: 65: // Constructors 66: 67: /** 68: * Creates a new JarEntry with the specified name and no attributes or 69: * or certificates. Calls <code>super(name)</code> so all other (zip)entry 70: * fields are null or -1. 71: * 72: * @param name the name of the new jar entry 73: * @exception NullPointerException when the supplied name is null 74: * @exception IllegalArgumentException when the supplied name is longer 75: * than 65535 bytes 76: */ 77: public JarEntry(String name) throws NullPointerException, 78: IllegalArgumentException 79: { 80: super(name); 81: attr = null; 82: certs = null; 83: } 84: 85: /** 86: * Creates a new JarEntry with the specified ZipEntry as template for 87: * all properties of the entry. Both attributes and certificates will be 88: * null. 89: * 90: * @param entry the ZipEntry whose fields should be copied 91: */ 92: public JarEntry(ZipEntry entry) 93: { 94: super(entry); 95: attr = null; 96: certs = null; 97: } 98: 99: /** 100: * Creates a new JarEntry with the specified JarEntry as template for 101: * all properties of the entry. 102: * 103: * @param entry the jarEntry whose fields should be copied 104: */ 105: public JarEntry(JarEntry entry) 106: { 107: super(entry); 108: try 109: { 110: attr = entry.getAttributes(); 111: } 112: catch (IOException _) 113: { 114: } 115: certs = entry.getCertificates(); 116: } 117: 118: // Methods 119: 120: /** 121: * Returns a copy of the Attributes set for this entry. 122: * When no Attributes are set in the manifest null is returned. 123: * 124: * @return a copy of the Attributes set for this entry 125: * @exception IOException This will never be thrown. It is here for 126: * binary compatibility. 127: */ 128: public Attributes getAttributes() throws IOException 129: { 130: if (attr != null) 131: { 132: return (Attributes) attr.clone(); 133: } 134: else 135: { 136: return null; 137: } 138: } 139: 140: /** 141: * Returns a copy of the certificates set for this entry. 142: * When no certificates are set or when not all data of this entry has 143: * been read null is returned. 144: * <p> 145: * To make sure that this call returns a valid value you must read all 146: * data from the JarInputStream for this entry. 147: * When you don't need the data for an entry but want to know the 148: * certificates that are set for the entry then you can skip all data by 149: * calling <code>skip(entry.getSize())</code> on the JarInputStream for 150: * the entry. 151: * 152: * @return a copy of the certificates set for this entry 153: */ 154: public Certificate[] getCertificates() 155: { 156: if (certs != null) 157: { 158: return (Certificate[])certs.clone(); 159: } 160: else 161: { 162: return null; 163: } 164: } 165: }
GNU Classpath (0.20) |