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 */ 017package org.apache.activemq.util; 018 019import java.beans.PropertyEditorSupport; 020import java.util.regex.Matcher; 021import 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 */ 032public 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}