ServiceProperties.java

/*******************************************************************************
 * Copyright (c) 2007 Composent, Inc. and others. All rights reserved. This
 * program and the accompanying materials are made available under the terms of
 * the Eclipse Public License v1.0 which accompanies this distribution, and is
 * available at http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors: Composent, Inc. - initial API and implementation
 ******************************************************************************/
package org.eclipse.ecf.discovery;

import java.io.Serializable;
import java.util.*;

/**
 * Service properties implementation class for {@link IServiceProperties}.
 * Subclasses may be created as appropriate.
 */
public class ServiceProperties implements IServiceProperties {

	private static final long serialVersionUID = -1033681952881598670L;

	private final Properties props;

	public ServiceProperties() {
		super();
		props = new Properties();
	}

	public ServiceProperties(Properties props) {
		super();
		this.props = (props == null) ? new Properties() : props;
	}

	/**
	 * Creates a copy of the given {@link IServiceProperties}
	 * 
	 * @param sp
	 *            service properties
	 * @since 2.1
	 */
	public ServiceProperties(IServiceProperties sp) {
		props = new Properties();
		Enumeration names = sp.getPropertyNames();
		while (names.hasMoreElements()) {
			String key = (String) names.nextElement();
			Object value = sp.getProperty(key);
			props.put(key, value);
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ecf.discovery.IServiceProperties#getPropertyNames()
	 */
	public Enumeration getPropertyNames() {
		return props.keys();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.ecf.discovery.IServiceProperties#getPropertyString(java.lang
	 * .String)
	 */
	public String getPropertyString(String name) {
		final Object val = props.get(name);
		if (val instanceof String) {
			return (String) val;
		}
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.ecf.discovery.IServiceProperties#getPropertyBytes(java.lang
	 * .String)
	 */
	public byte[] getPropertyBytes(String name) {
		final Object val = props.get(name);
		if (val instanceof ByteArrayWrapper) {
			ByteArrayWrapper baw = (ByteArrayWrapper) val;
			return baw.getByte();
		}
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.ecf.discovery.IServiceProperties#getProperty(java.lang.String
	 * )
	 */
	public Object getProperty(String name) {
		return props.get(name);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.ecf.discovery.IServiceProperties#setProperty(java.lang.String
	 * , java.lang.Object)
	 */
	public Object setProperty(String name, Object value) {
		return props.put(name, value);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.ecf.discovery.IServiceProperties#setPropertyBytes(java.lang
	 * .String, byte[])
	 */
	public Object setPropertyBytes(String name, byte[] value) {
		return props.put(name, new ByteArrayWrapper(value));
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.ecf.discovery.IServiceProperties#setPropertyString(java.lang
	 * .String, java.lang.String)
	 */
	public Object setPropertyString(String name, String value) {
		return props.put(name, value);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see java.lang.Object#equals(java.lang.Object)
	 */
	public boolean equals(Object obj) {
		if (obj instanceof ServiceProperties) {
			ServiceProperties sp = (ServiceProperties) obj;
			return props.equals(sp.props);
		}
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see java.lang.Object#hashCode()
	 */
	public int hashCode() {
		return props.hashCode();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see java.lang.Object#toString()
	 */
	public String toString() {
		StringBuffer buf = new StringBuffer("ServiceProperties["); //$NON-NLS-1$
		buf.append(props).append("]"); //$NON-NLS-1$
		return buf.toString();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ecf.discovery.IServiceProperties#size()
	 */
	public int size() {
		return props.size();
	}

	/**
	 * @return Properties
	 * @since 3.0
	 */
	public Properties asProperties() {
		Properties result = new Properties();
		Set keySet = props.keySet();
		for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
			Object key = (Object) iterator.next();
			Object value = props.get(key);
			if (value instanceof ByteArrayWrapper) {
				ByteArrayWrapper baw = (ByteArrayWrapper) value;
				result.put(key, baw.getByte());
			} else {
				result.put(key, value);
			}
		}
		return result;
	}

	// proper equals/hashcode for byte[]
	private static class ByteArrayWrapper implements Serializable {

		private static final long serialVersionUID = -8528836675536956297L;
		private final byte[] value;

		public ByteArrayWrapper(byte[] value) {
			this.value = value;
		}

		public byte[] getByte() {
			return value;
		}

		/*
		 * (non-Javadoc)
		 * 
		 * @see java.lang.Object#equals(java.lang.Object)
		 */
		public boolean equals(Object obj) {
			if (obj instanceof ByteArrayWrapper) {
				ByteArrayWrapper baw = (ByteArrayWrapper) obj;
				return Arrays.equals(value, baw.value);
			}
			return false;
		}

		/*
		 * (non-Javadoc)
		 * 
		 * @see java.lang.Object#hashCode()
		 */
		public int hashCode() {
			return value.hashCode();
		}

	}
}