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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2017 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
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 * or LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
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 * file and include the License file at LICENSE.txt.
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 * GPL Classpath Exception:
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 */

package javax.mail.search;

import javax.mail.Message;
import javax.mail.Address;

/**
 * This class implements comparisons for the From Address header.
 *
 * @author Bill Shannon
 * @author John Mani
 */
public final class FromTerm extends AddressTerm {

    private static final long serialVersionUID = 5214730291502658665L;

    /**
     * Constructor
     * @param address	The Address to be compared
     */
    public FromTerm(Address address) {
	super(address);
    }

    /**
     * The address comparator.
     *
     * @param msg	The address comparison is applied to this Message
     * @return		true if the comparison succeeds, otherwise false
     */
    @Override
    public boolean match(Message msg) {
	Address[] from;

	try {
	    from = msg.getFrom();
	} catch (Exception e) {
	    return false;
	}

	if (from == null)
	    return false;

	for (int i=0; i < from.length; i++)
	    if (super.match(from[i]))
		return true;
	return false;
    }

    /**
     * Equality comparison.
     */
    @Override
    public boolean equals(Object obj) {
	if (!(obj instanceof FromTerm))
	    return false;
	return super.equals(obj);
    }
}