org.apache.activemq.util.MemoryPropertyEditor Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.activemq.util;
import java.beans.PropertyEditorSupport;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Used by xbean to set longs.
*
* Important: Do not use this for other purposes than xbean, as property editors
* are not thread safe, and they are slow to use.
*
* Converts string values like "20 Mb", "1024kb", and "1g" to long values in
* bytes.
*/
public class MemoryPropertyEditor extends PropertyEditorSupport {
public void setAsText(String text) throws IllegalArgumentException {
Pattern p = Pattern.compile("^\\s*(\\d+)\\s*(b)?\\s*$", Pattern.CASE_INSENSITIVE);
Matcher m = p.matcher(text);
if (m.matches()) {
setValue(Long.valueOf(Long.parseLong(m.group(1))));
return;
}
p = Pattern.compile("^\\s*(\\d+)\\s*k(b)?\\s*$", Pattern.CASE_INSENSITIVE);
m = p.matcher(text);
if (m.matches()) {
setValue(Long.valueOf(Long.parseLong(m.group(1)) * 1024));
return;
}
p = Pattern.compile("^\\s*(\\d+)\\s*m(b)?\\s*$", Pattern.CASE_INSENSITIVE);
m = p.matcher(text);
if (m.matches()) {
setValue(Long.valueOf(Long.parseLong(m.group(1)) * 1024 * 1024));
return;
}
p = Pattern.compile("^\\s*(\\d+)\\s*g(b)?\\s*$", Pattern.CASE_INSENSITIVE);
m = p.matcher(text);
if (m.matches()) {
setValue(Long.valueOf(Long.parseLong(m.group(1)) * 1024 * 1024 * 1024));
return;
}
throw new IllegalArgumentException("Could convert not to a memory size: " + text);
}
public String getAsText() {
Long value = (Long)getValue();
return value != null ? value.toString() : "";
}
}