yoko-core/src/main/java/org/apache/yoko/orb/OB/TypeCodeCache.java

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
*  contributor license agreements.  See the NOTICE file distributed with
*  this work for additional information regarding copyright ownership.
*  The ASF licenses this file to You under the Apache License, Version 2.0
*  (the "License"); you may not use this file except in compliance with
*  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.apache.yoko.orb.OB;

import java.util.Hashtable;

public final class TypeCodeCache {
    private Hashtable cache_; // The type code cache hashtable

    static private TypeCodeCache instance_ = null; // Singleton instance

    private static final Object instanceMutex_ = new Object();

    // ----------------------------------------------------------------------
    // ORBInstance public member implementation
    // ----------------------------------------------------------------------

    TypeCodeCache() {
        cache_ = new Hashtable(63);
    }

    static public TypeCodeCache instance() {
        synchronized (instanceMutex_) {
            if (instance_ == null) {
                instance_ = new TypeCodeCache();
            }
        }
        return instance_;
    }

    synchronized public org.apache.yoko.orb.CORBA.TypeCode get(String id) {
        return (org.apache.yoko.orb.CORBA.TypeCode) cache_.get(id);
    }

    synchronized public void put(String id,
            org.apache.yoko.orb.CORBA.TypeCode tc) {
        if (cache_.containsKey(id))
            return;

        cache_.put(id, tc);
    }
}