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+/* Properties.java --
+ Copyright (C) 2003, 2006 Free Software Foundation, Inc.
+
+This file is a 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 of the License, 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; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
+USA
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.javax.crypto.keyring;
+
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+/**
+ * A set of <code>(name =&gt; value)</code> pairs used in keyring entries.
+ * Keys and values are simple strings, with the key never being empty and always
+ * treated case-insensitively.
+ */
+public class Properties
+ implements Cloneable
+{
+ private HashMap props;
+
+ /**
+ * Creates a new properties object.
+ */
+ public Properties()
+ {
+ props = new HashMap();
+ }
+
+ /**
+ * Removes all properties from this object.
+ */
+ public void clear()
+ {
+ props.clear();
+ }
+
+ /**
+ * Creates a copy of this properties object.
+ *
+ * @return The copy.
+ */
+ public Object clone()
+ {
+ Properties result = new Properties();
+ result.props.putAll(props);
+ return result;
+ }
+
+ /**
+ * Tests if this object contains a given property name.
+ *
+ * @param key The key to test.
+ * @return True if this object contains the given key.
+ */
+ public boolean containsKey(String key)
+ {
+ if (key == null || key.length() == 0)
+ return false;
+ return props.containsKey(canonicalize(key));
+ }
+
+ /**
+ * Tests if this object contains a given property value.
+ *
+ * @param value The value to test.
+ * @return True if this object contains the given value.
+ */
+ public boolean containsValue(String value)
+ {
+ if (value == null)
+ return false;
+ return props.containsValue(value);
+ }
+
+ /**
+ * Adds a new property to this object.
+ *
+ * @param key The key, which can neither be null nor empty.
+ * @param value The value, which cannot be null.
+ * @return The old value mapped by the key, if any.
+ * @throws IllegalArgumentException If either the key or value parameter is
+ * null, or if the key is empty.
+ */
+ public String put(String key, String value)
+ {
+ if (key == null || value == null || key.length() == 0)
+ throw new IllegalArgumentException("key nor value can be null");
+ return (String) props.put(canonicalize(key), value);
+ }
+
+ /**
+ * Returns the value mapped by the given key, or null if there is no such
+ * mapping.
+ *
+ * @param key
+ */
+ public String get(String key)
+ {
+ if (key == null || key.length() == 0)
+ return null;
+ return (String) props.get(canonicalize(key));
+ }
+
+ /**
+ * Removes a key and its value from this object.
+ *
+ * @param key The key of the property to remove.
+ * @return The old value mapped by the key, if any.
+ */
+ public String remove(String key)
+ {
+ if (key == null || key.length() == 0)
+ return null;
+ return (String) props.remove(canonicalize(key));
+ }
+
+ /**
+ * Decodes a set of properties from the given input stream.
+ *
+ * @param in The input stream.
+ * @throws IOException If an I/O error occurs.
+ */
+ public void decode(DataInputStream in) throws IOException
+ {
+ int len = in.readInt();
+ MeteredInputStream min = new MeteredInputStream(in, len);
+ DataInputStream in2 = new DataInputStream(min);
+ while (! min.limitReached())
+ {
+ String name = in2.readUTF();
+ String value = in2.readUTF();
+ put(name, value);
+ }
+ }
+
+ /**
+ * Encodes this set of properties to the given output stream.
+ *
+ * @param out The output stream to encode to.
+ * @throws IOException If an I/O error occurs.
+ */
+ public void encode(DataOutputStream out) throws IOException
+ {
+ ByteArrayOutputStream buf = new ByteArrayOutputStream();
+ DataOutputStream out2 = new DataOutputStream(buf);
+ for (Iterator it = props.entrySet().iterator(); it.hasNext();)
+ {
+ Map.Entry entry = (Map.Entry) it.next();
+ out2.writeUTF((String) entry.getKey());
+ out2.writeUTF((String) entry.getValue());
+ }
+ out.writeInt(buf.size());
+ buf.writeTo(out);
+ }
+
+ public String toString()
+ {
+ return props.toString();
+ }
+
+ private String canonicalize(String key)
+ {
+ return key.toLowerCase();
+ }
+}