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 * Used by xbean to set integers.
025 * <p/>
026 * <b>Important: </b> Do not use this for other purposes than xbean, as property editors
027 * are not thread safe, and they are slow to use.
028 * <p/>
029 * Converts string values like "20 Mb", "1024kb", and "1g" to int values in
030 * bytes.
031 */
032 public class MemoryIntPropertyEditor extends PropertyEditorSupport {
033 public void setAsText(String text) throws IllegalArgumentException {
034
035 Pattern p = Pattern.compile("^\\s*(\\d+)\\s*(b)?\\s*$", Pattern.CASE_INSENSITIVE);
036 Matcher m = p.matcher(text);
037 if (m.matches()) {
038 setValue(Integer.valueOf(Integer.parseInt(m.group(1))));
039 return;
040 }
041
042 p = Pattern.compile("^\\s*(\\d+)\\s*k(b)?\\s*$", Pattern.CASE_INSENSITIVE);
043 m = p.matcher(text);
044 if (m.matches()) {
045 setValue(Integer.valueOf(Integer.parseInt(m.group(1)) * 1024));
046 return;
047 }
048
049 p = Pattern.compile("^\\s*(\\d+)\\s*m(b)?\\s*$", Pattern.CASE_INSENSITIVE);
050 m = p.matcher(text);
051 if (m.matches()) {
052 setValue(Integer.valueOf(Integer.parseInt(m.group(1)) * 1024 * 1024));
053 return;
054 }
055
056 p = Pattern.compile("^\\s*(\\d+)\\s*g(b)?\\s*$", Pattern.CASE_INSENSITIVE);
057 m = p.matcher(text);
058 if (m.matches()) {
059 setValue(Integer.valueOf(Integer.parseInt(m.group(1)) * 1024 * 1024 * 1024));
060 return;
061 }
062
063 throw new IllegalArgumentException("Could convert not to a memory size: " + text);
064 }
065
066 public String getAsText() {
067 Integer value = (Integer)getValue();
068 return value != null ? value.toString() : "";
069 }
070
071 }