NonModifiableProperties.java

package de.catma.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.util.Collection;
import java.util.InvalidPropertiesFormatException;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

public class NonModifiableProperties extends Properties {
	
	private Map<Object,Object> delegate;

	public NonModifiableProperties(Map<Object, Object> delegate) {
		super();
		this.delegate = delegate;
	}

	
	@Override
	public synchronized Object setProperty(String key, String value) {
		throw new UnsupportedOperationException("non modifiable properties");
	}

	@Override
	public synchronized void load(Reader reader) throws IOException {
		throw new UnsupportedOperationException("non modifiable properties");
	}

	@Override
	public synchronized void load(InputStream inStream) throws IOException {
		throw new UnsupportedOperationException("non modifiable properties");
	}

	@Override
	public synchronized void loadFromXML(InputStream in) throws IOException,
			InvalidPropertiesFormatException {
		throw new UnsupportedOperationException("non modifiable properties");
	}

	@Override
	public String getProperty(String key) {
        Object oval = get(key);
        String sval = (oval instanceof String) ? (String)oval : null;
        return ((sval == null) && (defaults != null)) ? defaults.getProperty(key) : sval;
	}

	public int size() {
		return delegate.size();
	}

	public boolean isEmpty() {
		return delegate.isEmpty();
	}

	public boolean containsKey(Object key) {
		return delegate.containsKey(key);
	}

	public boolean containsValue(Object value) {
		return delegate.containsValue(value);
	}

	public Object get(Object key) {
		return delegate.get(key);
	}

	public Object put(Object key, Object value) {
		return delegate.put(key, value);
	}

	public Object remove(Object key) {
		return delegate.remove(key);
	}

	public void putAll(Map<? extends Object, ? extends Object> m) {
		delegate.putAll(m);
	}

	public void clear() {
		delegate.clear();
	}

	public Set<Object> keySet() {
		return delegate.keySet();
	}

	public Collection<Object> values() {
		return delegate.values();
	}

	public Set<java.util.Map.Entry<Object, Object>> entrySet() {
		return delegate.entrySet();
	}

	public boolean equals(Object o) {
		return delegate.equals(o);
	}

	public int hashCode() {
		return delegate.hashCode();
	}

}