home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

ActiveMQ example source code file (ResultTransformFilter.java)

This example ActiveMQ source code file (ResultTransformFilter.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 - ActiveMQ tags/keywords

arraylist, exception, exception, iterator, list, list, object, queryfilter, queryfilter, resulttransformfilter, resulttransformfilter, util

The ActiveMQ ResultTransformFilter.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.activemq.console.filter;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public abstract class ResultTransformFilter implements QueryFilter {
    private QueryFilter next;

    /**
     * Constructs a query filter that transform the format of the query result
     * 
     * @param next - the query filter to retrieve the results from
     */
    protected ResultTransformFilter(QueryFilter next) {
        this.next = next;
    }

    /**
     * Transforms the queried results to a collection of different objects
     * 
     * @param query - the query string
     * @return collections of transformed objects
     * @throws Exception
     */
    public List query(String query) throws Exception {
        return transformList(next.query(query));
    }

    /**
     * Transforms the queried results to a collection of different objects
     * 
     * @param queries - the query map
     * @return collections of transformed objects
     * @throws Exception
     */
    public List<Object> query(List queries) throws Exception {
        return transformList(next.query(queries));
    }

    /**
     * Transforms a collection to a collection of different objects.
     * 
     * @param result - the collection to transform
     * @return collection of properties objects
     */
    protected List<Object> transformList(List result) throws Exception {
        List<Object> props = new ArrayList();

        for (Iterator<Object> i = result.iterator(); i.hasNext();) {
            props.add(transformElement(i.next()));
        }

        return props;
    }

    /**
     * Transform a result object
     * 
     * @param obj - the object instance to transform
     * @return the transformed object
     */
    protected abstract Object transformElement(Object obj) throws Exception;

}

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ ResultTransformFilter.java source code file:

new blog posts

 

Copyright 1998-2016 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.