57b4edef7d
Reported by Helmer Kraemer <hkraemer@freenet.de> * java/util/jar/JarInputStream.java (readManifest): Don't call closeEntry(). * java/util/zip/DeflaterOutputStream.java (inbufWrite): New method. (finish): Use inbufWrite(). (write(int)): Likewise. (write(byte[],int,int)): Likewise. From-SVN: r72976
201 lines
6.0 KiB
Java
201 lines
6.0 KiB
Java
/* JarInputStream.java - InputStream for reading jar files
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Copyright (C) 2000 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.util.jar;
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import java.io.InputStream;
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import java.io.IOException;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipInputStream;
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/**
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* InputStream for reading jar files.
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* XXX - verification of the signatures in the Manifest file is not yet
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* implemented.
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*
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* @since 1.2
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* @author Mark Wielaard (mark@klomp.org)
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*/
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public class JarInputStream extends ZipInputStream
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{
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// Fields
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/** The manifest for this file or null when there was no manifest. */
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private Manifest manifest;
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/** The first real JarEntry for this file. Used by readManifest() to store
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an entry that isn't the manifest but that should be returned by
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getNextEntry next time it is called. Null when no firstEntry was read
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while searching for the manifest entry, or when it has already been
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returned by getNextEntry(). */
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private JarEntry firstEntry;
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// Constructors
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/**
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* Creates a new JarInputStream and tries to read the manifest.
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* If such a manifest is present the JarInputStream tries to verify all
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* the entry signatures while reading.
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*
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* @param in InputStream to read the jar from
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* @exception IOException when an error occurs when opening or reading
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*/
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public JarInputStream(InputStream in) throws IOException
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{
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this(in, true);
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}
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/**
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* Creates a new JarInputStream and tries to read the manifest.
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* If such a manifest is present and verify is true, the JarInputStream
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* tries to verify all the entry signatures while reading.
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*
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* @param in InputStream to read the jar from
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* @param verify whether or not to verify the manifest entries
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* @exception IOException when an error occurs when opening or reading
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*/
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public JarInputStream(InputStream in, boolean verify) throws IOException
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{
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super(in);
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readManifest(verify);
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}
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// Methods
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/**
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* Set the manifest if found. Skips all entries that start with "META-INF/"
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*
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* @param verify when true (and a Manifest is found) checks the Manifest,
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* when false no check is performed
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* @exception IOException if an error occurs while reading
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*/
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private void readManifest(boolean verify) throws IOException
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{
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firstEntry = (JarEntry) super.getNextEntry();
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while ((firstEntry != null) &&
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firstEntry.getName().startsWith("META-INF/"))
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{
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if (firstEntry.getName().equals(JarFile.MANIFEST_NAME))
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{
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manifest = new Manifest(this);
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}
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firstEntry = (JarEntry) super.getNextEntry();
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}
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if (verify)
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{
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// XXX
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}
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}
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/**
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* Creates a JarEntry for a particular name and consults the manifest
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* for the Attributes of the entry.
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* Used by <code>ZipEntry.getNextEntry()</code>
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*
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* @param name the name of the new entry
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*/
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protected ZipEntry createZipEntry(String name)
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{
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ZipEntry zipEntry = super.createZipEntry(name);
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JarEntry jarEntry = new JarEntry(zipEntry);
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if (manifest != null)
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{
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jarEntry.attr = manifest.getAttributes(name);
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}
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return jarEntry;
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}
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/**
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* Returns the Manifest for the jar file or null if there was no Manifest.
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*/
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public Manifest getManifest()
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{
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return manifest;
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}
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/**
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* Returns the next entry or null when there are no more entries.
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* Does actually return a JarEntry, if you don't want to cast it yourself
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* use <code>getNextJarEntry()</code>. Does not return any entries found
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* at the beginning of the ZipFile that are special
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* (those that start with "META-INF/").
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*
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* @exception IOException if an IO error occurs when reading the entry
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*/
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public ZipEntry getNextEntry() throws IOException
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{
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ZipEntry entry;
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if (firstEntry != null)
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{
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entry = firstEntry;
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firstEntry = null;
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}
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else
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{
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entry = super.getNextEntry();
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}
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return entry;
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}
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/**
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* Returns the next jar entry or null when there are no more entries.
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*
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* @exception IOException if an IO error occurs when reading the entry
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*/
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public JarEntry getNextJarEntry() throws IOException
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{
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return (JarEntry) getNextEntry();
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}
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/**
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* XXX
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*
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* @param buf XXX
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* @param off XXX
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* @param len XXX
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* @return XXX
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* @exception IOException XXX
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*/
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public int read(byte[]buf, int off, int len) throws IOException
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{
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// XXX if (verify) {}
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return super.read(buf, off, len);
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}
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}
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