ActiveMQ example source code file (GroupPropertiesViewFilter.java)

This example ActiveMQ source code file (GroupPropertiesViewFilter.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

exception, grouppropertiesviewfilter, grouppropertiesviewfilter, hashmap, iterator, iterator, map, map, propertiesviewfilter, queryfilter, string, string, util

The ActiveMQ GroupPropertiesViewFilter.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.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

public class GroupPropertiesViewFilter extends PropertiesViewFilter {

    /**
     * Creates a group properties filter that is able to filter the display
     * result based on a group prefix
     * 
     * @param next - the next query filter
     */
    public GroupPropertiesViewFilter(QueryFilter next) {
        super(next);
    }

    /**
     * Creates a group properties filter that is able to filter the display
     * result based on a group prefix
     * 
     * @param groupView - the group filter to use
     * @param next - the next query filter
     */
    public GroupPropertiesViewFilter(Set groupView, QueryFilter next) {
        super(groupView, next);
    }

    /**
     * Filter the properties that matches the group prefix only.
     * 
     * @param data - map data to filter
     * @return - filtered map data
     */
    protected Map filterView(Map data) {
        // If no view specified, display all attributes
        if (viewFilter == null || viewFilter.isEmpty()) {
            return data;
        }

        Map newData;
        try {
            // Lets try to use the same class as the original
            newData = data.getClass().newInstance();
        } catch (Exception e) {
            // Lets use a default HashMap
            newData = new HashMap();
        }

        // Filter the keys to view
        for (Iterator<String> i = data.keySet().iterator(); i.hasNext();) {
            String key = i.next();

            // Checks if key matches any of the group filter
            for (Iterator j = viewFilter.iterator(); j.hasNext();) {
                String group = (String)j.next();
                if (key.startsWith(group)) {
                    newData.put(key, data.get(key));
                    break;
                }
            }
        }

        return newData;
    }
}