mirror of git://gcc.gnu.org/git/gcc.git
94 lines
3.4 KiB
Java
94 lines
3.4 KiB
Java
/* CompressedEntry.java --
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Copyright (C) 2003, 2006 Free Software Foundation, Inc.
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This file is a 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 of the License, or (at
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your option) 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; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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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 gnu.javax.crypto.keyring;
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import java.io.ByteArrayOutputStream;
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import java.io.DataInputStream;
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import java.io.DataOutputStream;
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import java.io.IOException;
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import java.util.Iterator;
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import java.util.zip.DeflaterOutputStream;
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import java.util.zip.InflaterInputStream;
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public class CompressedEntry
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extends EnvelopeEntry
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{
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public static final int TYPE = 4;
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public CompressedEntry(Properties properties)
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{
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super(TYPE, properties);
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this.properties.put("algorithm", "DEFLATE");
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}
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private CompressedEntry()
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{
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this(new Properties());
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}
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public static CompressedEntry decode(DataInputStream in) throws IOException
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{
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CompressedEntry entry = new CompressedEntry();
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entry.properties.decode(in);
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String alg = entry.properties.get("algorithm");
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if (alg == null)
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throw new MalformedKeyringException("no compression algorithm");
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if (! alg.equalsIgnoreCase("DEFLATE"))
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throw new MalformedKeyringException("unsupported compression algorithm: "
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+ alg);
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int len = in.readInt();
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MeteredInputStream min = new MeteredInputStream(in, len);
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InflaterInputStream infin = new InflaterInputStream(min);
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DataInputStream in2 = new DataInputStream(infin);
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entry.decodeEnvelope(in2);
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return entry;
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}
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protected void encodePayload() throws IOException
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{
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ByteArrayOutputStream buf = new ByteArrayOutputStream(1024);
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DeflaterOutputStream dout = new DeflaterOutputStream(buf);
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DataOutputStream out2 = new DataOutputStream(dout);
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for (Iterator it = entries.iterator(); it.hasNext();)
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((Entry) it.next()).encode(out2);
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dout.finish();
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payload = buf.toByteArray();
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}
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}
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