/*
* Copyright 2006-2007 The Scriptella Project Team.
*
* Licensed 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.
*/
import java.io.IOException;
import java.io.InputStream;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
/**
* Represents a persistent set of properties.
* This class is a replacement for {@link Properties} class.
*
Please note that {@link #put(String,Object)} has additional semantics.
*
* @author Fyodor Kupolov
* @version 1.0
*/
public class PropertiesMap implements Map {
private Map props;
public PropertiesMap() {
props = new LinkedHashMap();
}
public PropertiesMap(int initialCapacity) {
props = new LinkedHashMap(initialCapacity);
}
public PropertiesMap(Map props) {
this(props.size());
putAll(props);
}
/**
* Creates a properties map from the stream.
*
* @param is stream to {@link #load(java.io.InputStream) load} properties from.
* @throws IOException if I/O error occurs
* @see #load(java.io.InputStream)
*/
public PropertiesMap(InputStream is) throws IOException {
this();
load(is);
}
public int size() {
return props.size();
}
public boolean isEmpty() {
return props.isEmpty();
}
public boolean containsKey(Object key) {
return props.containsKey(key);
}
public boolean containsValue(Object value) {
return props.containsValue(value);
}
public Object get(Object key) {
return props.get(key);
}
/**
* Put the property to underlying map.
* The properties are immutable, i.e. if the property is already present in the map, the new value is ignored.
*
* @param key property name
* @param value property value
* @return value associated with specified key,
* or null if there was no mapping for key.
*/
public Object put(String key, Object value) {
Object old = props.get(key);
if (old == null) {
props.put(key, value);
}
return old;
}
public Object remove(Object key) {
return props.remove(key);
}
public void putAll(Map t) {
for (Entry entry : t.entrySet()) {
put(entry.getKey(), entry.getValue());
}
}
public void clear() {
props.clear();
}
public Set keySet() {
return props.keySet();
}
public Collection