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 int values in
025 * bytes.
026 */
027 public class MemoryIntPropertyEditor extends PropertyEditorSupport {
028 public void setAsText(String text) throws IllegalArgumentException {
029
030 Pattern p = Pattern.compile("^\\s*(\\d+)\\s*(b)?\\s*$", Pattern.CASE_INSENSITIVE);
031 Matcher m = p.matcher(text);
032 if (m.matches()) {
033 setValue(Integer.valueOf(Integer.parseInt(m.group(1))));
034 return;
035 }
036
037 p = Pattern.compile("^\\s*(\\d+)\\s*k(b)?\\s*$", Pattern.CASE_INSENSITIVE);
038 m = p.matcher(text);
039 if (m.matches()) {
040 setValue(Integer.valueOf(Integer.parseInt(m.group(1)) * 1024));
041 return;
042 }
043
044 p = Pattern.compile("^\\s*(\\d+)\\s*m(b)?\\s*$", Pattern.CASE_INSENSITIVE);
045 m = p.matcher(text);
046 if (m.matches()) {
047 setValue(Integer.valueOf(Integer.parseInt(m.group(1)) * 1024 * 1024));
048 return;
049 }
050
051 p = Pattern.compile("^\\s*(\\d+)\\s*g(b)?\\s*$", Pattern.CASE_INSENSITIVE);
052 m = p.matcher(text);
053 if (m.matches()) {
054 setValue(Integer.valueOf(Integer.parseInt(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 Integer value = (Integer)getValue();
063 return value != null ? value.toString() : "";
064 }
065
066 }