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.activemq.util;
018    
019    import java.beans.PropertyEditorSupport;
020    import java.util.regex.Matcher;
021    import java.util.regex.Pattern;
022    
023    /**
024     * Converts string values like "20 Mb", "1024kb", and "1g" to long values in
025     * bytes.
026     */
027    public class MemoryPropertyEditor extends PropertyEditorSupport {
028        public void setAsText(String text) throws IllegalArgumentException {
029    
030            Pattern p = Pattern.compile("^\\s*(\\d+)\\s*(b)?\\s*$", Pattern.CASE_INSENSITIVE);
031            Matcher m = p.matcher(text);
032            if (m.matches()) {
033                setValue(Long.valueOf(Long.parseLong(m.group(1))));
034                return;
035            }
036    
037            p = Pattern.compile("^\\s*(\\d+)\\s*k(b)?\\s*$", Pattern.CASE_INSENSITIVE);
038            m = p.matcher(text);
039            if (m.matches()) {
040                setValue(Long.valueOf(Long.parseLong(m.group(1)) * 1024));
041                return;
042            }
043    
044            p = Pattern.compile("^\\s*(\\d+)\\s*m(b)?\\s*$", Pattern.CASE_INSENSITIVE);
045            m = p.matcher(text);
046            if (m.matches()) {
047                setValue(Long.valueOf(Long.parseLong(m.group(1)) * 1024 * 1024));
048                return;
049            }
050    
051            p = Pattern.compile("^\\s*(\\d+)\\s*g(b)?\\s*$", Pattern.CASE_INSENSITIVE);
052            m = p.matcher(text);
053            if (m.matches()) {
054                setValue(Long.valueOf(Long.parseLong(m.group(1)) * 1024 * 1024 * 1024));
055                return;
056            }
057    
058            throw new IllegalArgumentException("Could convert not to a memory size: " + text);
059        }
060    
061        public String getAsText() {
062            Long value = (Long)getValue();
063            return value != null ? value.toString() : "";
064        }
065    
066    }