Add last two java.util.jar classes

1 files changed, 175 insertions, 0 deletions

diff --git a/java/util/jar/JarInputStream.java b/java/util/jar/JarInputStream.java
new file mode 100644
index 000000000..c8f534063
--- /dev/null
+++ b/java/util/jar/JarInputStream.java
@@ -0,0 +1,175 @@
+/* JarInputStream.java - InputStream for reading jar files
+   Copyright (C) 2000 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+ 
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+As a special exception, if you link this library with other files to
+produce an executable, this library does not by itself cause the
+resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why the
+executable file might be covered by the GNU General Public License. */
+
+package java.util.jar;
+
+import java.io.InputStream;
+import java.io.IOException;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+/**
+ * InputStream for reading jar files.
+ * XXX - verification of the signatures in the Manifest file is not yet
+ * implemented.
+ *
+ * @since 1.2
+ * @author Mark Wielaard (mark@klomp.org)
+ */
+ 
+public class JarInputStream extends ZipInputStream {
+
+    // Fields
+
+    /** The manifest for this file or null when there was no manifest. */
+    private Manifest manifest;
+
+    /** The first real JarEntry for this file. Used by readManifest() to store
+        an entry that isn't the manifest but that should be returned by
+        getNextEntry next time it is called. Null when no firstEntry was read
+        while searching for the manifest entry, or when it has already been
+        returned by getNextEntry(). */
+    private JarEntry firstEntry;
+
+    // Constructors
+
+    /**
+     * Creates a new JarInputStream and tries to read the manifest.
+     * If such a manifest is present the JarInputStream tries to verify all
+     * the entry signatures while reading.
+     *
+     * @param in InputStream to read the jar from
+     * @exception IOException when an error occurs when opening or reading
+     */
+    public JarInputStream(InputStream in) throws IOException {
+        this(in, true);
+    }
+
+    /**
+     * Creates a new JarInputStream and tries to read the manifest.
+     * If such a manifest is present and verify is true, the JarInputStream
+     * tries to verify all the entry signatures while reading.
+     *
+     * @param in InputStream to read the jar from
+     * @param verify wheter or not to verify the manifest entries
+     * @exception IOException when an error occurs when opening or reading
+     */
+    public JarInputStream(InputStream in, boolean verify) throws IOException {
+        super(in);
+        readManifest(verify);
+    }
+
+    // Methods
+
+    /**
+     * Set the manifest if found. Skips all entries that start with "META-INF/"
+     *
+     * @param verify when true (and a Manifest is found) checks the Manifest,
+     * when false no check is performed
+     * @exception IOException if an error occurs while reading
+     */
+    private void readManifest(boolean verify) throws IOException {
+        firstEntry = (JarEntry) super.getNextEntry();
+        while ((firstEntry != null) &&
+               firstEntry.getName().startsWith("META-INF/")) {
+            if(firstEntry.getName().equals(JarFile.MANIFEST_NAME)) {
+                manifest = new Manifest(this);
+            }
+            firstEntry = (JarEntry) super.getNextEntry();
+        }
+        closeEntry();
+
+        if (verify) {
+            // XXX
+        }
+    }
+
+    /**
+     * Creates a JarEntry for a particular name and consults the manifest
+     * for the Attributes of the entry.
+     * Used by <code>ZipEntry.getNextEntry()</code>
+     *
+     * @param name the name of the new entry
+     */
+    protected ZipEntry createZipEntry(String name) {
+        ZipEntry zipEntry = super.createZipEntry(name);
+        JarEntry jarEntry = new JarEntry(zipEntry);
+        if (manifest != null) {
+            jarEntry.attr = manifest.getAttributes(name);
+        }
+        return jarEntry;
+    }
+    
+    /**
+     * Returns the Manifest for the jar file or null if there was no Manifest.
+     */
+    public Manifest getManifest() {
+        return manifest;
+    }
+
+    /**
+     * Returns the next entry or null when there are no more entries.
+     * Does actually return a JarEntry, if you don't want to cast it yourself
+     * use <code>getNextJarEntry()</code>. Does not return any entries found
+     * at the beginning of the ZipFile that are special
+     * (those that start with "META-INF/").
+     *
+     * @exception IOException if an IO error occurs when reading the entry
+     */
+    public ZipEntry getNextEntry() throws IOException {
+        ZipEntry entry;
+        if (firstEntry != null) {
+            entry = firstEntry;
+            firstEntry = null;
+        } else {
+            entry = super.getNextEntry();
+        }
+        return entry;
+    }
+
+    /**
+     * Returns the next jar entry or null when there are no more entries.
+     *
+     * @exception IOException if an IO error occurs when reading the entry
+     */
+    public JarEntry getNextJarEntry() throws IOException {
+        return (JarEntry)getNextEntry();
+    }
+
+    /**
+     * XXX
+     *
+     * @param buf XXX
+     * @param off XXX
+     * @param len XXX
+     * @return XXX
+     * @exception IOException XXX
+     */
+    public int read(byte[] buf, int off, int len) throws IOException {
+        // XXX if (verify) {}
+        return super.read(buf, off, len);
+    }
+}