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Commons Collections example source code file (TypedBuffer.java)

This example Commons Collections source code file (TypedBuffer.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Collections tags/keywords

buffer, buffer, class, class, predicatedbuffer, predicatedbuffer, typedbuffer, typedbuffer

The Commons Collections TypedBuffer.java source code

/*
 *  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.commons.collections.buffer;

import org.apache.commons.collections.Buffer;
import org.apache.commons.collections.functors.InstanceofPredicate;

/**
 * Decorates another <code>Buffer to validate that elements added
 * are of a specific type.
 * <p>
 * The validation of additions is performed via an instanceof test against 
 * a specified <code>Class. If an object cannot be added to the
 * collection, an IllegalArgumentException is thrown.
 *
 * @since Commons Collections 3.0
 * @version $Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $
 * 
 * @author Stephen Colebourne
 * @author Matthew Hawthorne
 */
public class TypedBuffer {

    /**
     * Factory method to create a typed list.
     * <p>
     * If there are any elements already in the buffer being decorated, they
     * are validated.
     * 
     * @param buffer  the buffer to decorate, must not be null
     * @param type  the type to allow into the buffer, must not be null
     * @return a new typed Buffer
     * @throws IllegalArgumentException if buffer or type is null
     * @throws IllegalArgumentException if the buffer contains invalid elements
     */
    public static Buffer decorate(Buffer buffer, Class type) {
        return new PredicatedBuffer(buffer, InstanceofPredicate.getInstance(type));
    }
    
    /**
     * Restrictive constructor.
     */
    protected TypedBuffer() {
        super();
    }

}

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