001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.commons.monitoring.reporting.web.plugin.json;
018    
019    import java.util.Iterator;
020    import java.util.Map;
021    
022    public final class Jsons {
023        public static String toJson(final Map<Long, Double> data) { // helper for gauges
024            final StringBuilder builder = new StringBuilder().append("[");
025            final Iterator<Map.Entry<Long,Double>> iterator = data.entrySet().iterator();
026            while (iterator.hasNext()) {
027                final Map.Entry<Long, Double> entry = iterator.next();
028                builder.append("[").append(entry.getKey()).append(", ").append(entry.getValue()).append("]");
029                if (iterator.hasNext()) {
030                    builder.append(", ");
031                }
032            }
033            return builder.append("]").toString();
034        }
035    
036        private Jsons() {
037            // no-op
038        }
039    }