/*******************************************************************************
 * Copyright (c) 2000, 2004 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.examples.propertysheet;

import java.util.Vector;

import org.eclipse.ui.views.properties.IPropertyDescriptor;
import org.eclipse.ui.views.properties.IPropertySource;
import org.eclipse.ui.views.properties.PropertyDescriptor;

/**
 * Example IPropertySource is editable and whose childern properties are itself not editable.
 * The values of "userid" and "mailserver" are parsed from setting "email"
 */
public class EmailAddress implements IPropertySource {

    //Property-Value
    private String userid;

    private String domain;

    //Default Property-Value
    private static final String USERID_DEFAULT = MessageUtil
            .getString("unknownUser"); //$NON-NLS-1$

    private static final String DOMAIN_DEFAULT = MessageUtil
            .getString("unknownDomain"); //$NON-NLS-1$

    //Property unique keys
    public static final String P_ID_USERID = "EmailAddress.userid"; //$NON-NLS-1$

    public static final String P_ID_DOMAIN = "EmailAddress.domain"; //$NON-NLS-1$

    //Property display keys
    public static final String P_USERID = MessageUtil.getString("userid"); //$NON-NLS-1$

    public static final String P_DOMAIN = MessageUtil.getString("domain"); //$NON-NLS-1$

    //Property-Descriptors
    private static Vector descriptors;

    static {
        descriptors = new Vector(2, 2);
        //non-editable child properties --> provide no editors
        descriptors.addElement(new PropertyDescriptor(P_ID_USERID, P_USERID));
        descriptors.addElement(new PropertyDescriptor(P_ID_DOMAIN, P_DOMAIN));
    }

    /**
     * EmailAddress Default Constructor
     */
    public EmailAddress() {
        super();
    }

    /**
     * Convience EmailAddress constructor.
     * Calls setEmailAddress() to parse emailAddress
     * @param emailAddress java.lang.String, in the form userid@domain
     * @throws java.lang.IllegalArgumentException, if does not subscribe to form
     */
    public EmailAddress(String emailAddress) throws IllegalArgumentException {
        super();
        setEmailAddress(emailAddress);

    }

    /**
     * Returns the descriptors
     */
    private static Vector getDescriptors() {
        return descriptors;
    }

    /**
     * Returns the domain
     */
    private String getDomain() {
        if (domain == null)
            domain = DOMAIN_DEFAULT;
        return domain;
    }

    /* (non-Javadoc)
     * Method declared on IPropertySource
     */
    public Object getEditableValue() {
        return this.toString();
    }

    /* (non-Javadoc)
     * Method declared on IPropertySource
     */
    public IPropertyDescriptor[] getPropertyDescriptors() {
        return (IPropertyDescriptor[]) getDescriptors().toArray(
                new IPropertyDescriptor[getDescriptors().size()]);
    }

    /** 
     * The <code>EmailAddress</code> implementation of this
     * <code>IPropertySource</code> method returns the following properties
     *
     * 	1) P_USERID returns String, values before "@"
     *	2) P_DOMAIN returns String, values after "@"
     *
     * Observe the available properties must always equal those listed
     * in the property descriptors
     */
    public Object getPropertyValue(Object propKey) {
        if (propKey.equals(P_ID_USERID))
            return getUserid();
        if (propKey.equals(P_ID_DOMAIN))
            return getDomain();
        return null;
    }

    /**
     * Returns the userid
     */
    private String getUserid() {
        if (userid == null)
            userid = USERID_DEFAULT;
        return userid;
    }

    /* (non-Javadoc)
     * Method declared on IPropertySource
     */
    public boolean isPropertySet(Object property) {
        return false;
    }

    /* (non-Javadoc)
     * Method declared on IPropertySource
     */
    public void resetPropertyValue(Object property) {
        return;
    }

    /**
     * Sets the domain
     */
    private void setDomain(java.lang.String newDomain) {
        domain = newDomain;
    }

    /**
     * Parses emailAddress into domain and userid. Throws SetPropertyVetoException
     * if emailAddress does not contain an userid and domain seperated by '@'.
     *
     * @param emailAddress the email address
     * @throws IllegalArgumentException
     */
    private void setEmailAddress(String emailAddress)
            throws IllegalArgumentException {
        if (emailAddress == null)
            throw new IllegalArgumentException(MessageUtil
                    .getString("emailaddress_cannot_be_set_to_null")); //$NON-NLS-1$
        int index = emailAddress.indexOf('@');
        int length = emailAddress.length();
        if (index > 0 && index < length) {
            setUserid(emailAddress.substring(0, index));
            setDomain(emailAddress.substring(index + 1));
            return;
        }
        throw new IllegalArgumentException(
                MessageUtil
                        .getString("invalid_email_address_format_should_have_been_validated")); //$NON-NLS-1$
    }

    /** 
     * The <code>Address</code> implementation of this
     * <code>IPropertySource</code> method 
     * defines the following Setable properties
     *
     *	1) P_USERID, expects String
     *	2) P_DOMAIN, expects String
     */
    public void setPropertyValue(Object name, Object value) {
        if (name.equals(P_ID_USERID)) {
            setUserid((String) value);
            return;
        }
        if (name.equals(P_ID_DOMAIN)) {
            setDomain((String) value);
            return;
        }
    }

    /**
     * Sets the userid
     */
    private void setUserid(String newUserid) {
        userid = newUserid;
    }

    /**
     * The value as displayed in the Property Sheet.
     * @return java.lang.String
     */
    public String toString() {
        StringBuffer strbuffer = new StringBuffer(getUserid());
        strbuffer.append('@');
        strbuffer.append(getDomain());
        return strbuffer.toString();
    }
}