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The Waikato Environment for Knowledge Analysis (WEKA), a machine
learning workbench. This is the stable version. Apart from bugfixes, this version
does not receive any other updates.
/*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
/*
* ProtectedProperties.java
* Copyright (C) 2001-2012 University of Waikato, Hamilton, New Zealand
*
*/
package weka.core;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Map;
import java.util.Properties;
/**
* Simple class that extends the Properties class so that the properties are
* unable to be modified.
*
* @author Richard Kirkby ([email protected])
* @version $Revision: 10203 $
*/
public class ProtectedProperties extends Properties implements RevisionHandler {
/** for serialization */
private static final long serialVersionUID = 3876658672657323985L;
/** the properties need to be open during construction of the object */
private boolean closed = false;
/**
* Creates a set of protected properties from a set of normal ones.
*
* @param props the properties to be stored and protected.
*/
public ProtectedProperties(Properties props) {
Enumeration propEnum = props.propertyNames();
while (propEnum.hasMoreElements()) {
String propName = (String) propEnum.nextElement();
String propValue = props.getProperty(propName);
super.setProperty(propName, propValue);
}
closed = true; // no modifications allowed from now on
}
/**
* Overrides a method to prevent the properties from being modified.
*
* @return never returns without throwing an exception.
* @throws UnsupportedOperationException always.
*/
@Override
public Object setProperty(String key, String value) {
if (closed) {
throw new UnsupportedOperationException(
"ProtectedProperties cannot be modified!");
} else {
return super.setProperty(key, value);
}
}
/**
* Overrides a method to prevent the properties from being modified.
*
* @throws UnsupportedOperationException always.
*/
@Override
public void load(InputStream inStream) {
throw new UnsupportedOperationException(
"ProtectedProperties cannot be modified!");
}
/**
* Overrides a method to prevent the properties from being modified.
*
* @throws UnsupportedOperationException always.
*/
@Override
public void clear() {
throw new UnsupportedOperationException(
"ProtectedProperties cannot be modified!");
}
/**
* Overrides a method to prevent the properties from being modified.
*
* @return never returns without throwing an exception.
* @throws UnsupportedOperationException always.
*/
@Override
public Object put(Object key, Object value) {
if (closed) {
throw new UnsupportedOperationException(
"ProtectedProperties cannot be modified!");
} else {
return super.put(key, value);
}
}
/**
* Overrides a method to prevent the properties from being modified.
*
* @throws UnsupportedOperationException always.
*/
@Override
public void putAll(Map t) {
throw new UnsupportedOperationException(
"ProtectedProperties cannot be modified!");
}
/**
* Overrides a method to prevent the properties from being modified.
*
* @return never returns without throwing an exception.
* @throws UnsupportedOperationException always.
*/
@Override
public Object remove(Object key) {
throw new UnsupportedOperationException(
"ProtectedProperties cannot be modified!");
}
/**
* Returns the revision string.
*
* @return the revision
*/
@Override
public String getRevision() {
return RevisionUtils.extract("$Revision: 10203 $");
}
}