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/*
* OrTerm.java
* Copyright (C) 2002 The Free Software Foundation
*
* This file is part of GNU JavaMail, a library.
*
* GNU JavaMail is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNU JavaMail is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* As a special exception, if you link this library with other files to
* produce an executable, this library does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* This exception does not however invalidate any other reasons why the
* executable file might be covered by the GNU General Public License.
*/
package javax.mail.search;
import javax.mail.Message;
/**
* This class implements the logical OR operator on individual SearchTerms.
*
* @author <a href="mailto:dog@gnu.org">Chris Burdess</a>
* @version 1.3
*/
public final class OrTerm
extends SearchTerm
{
/**
* The array of terms on which the OR operator should be applied.
*/
protected SearchTerm[] terms;
/**
* Constructor that takes two operands.
* @param t1 first term
* @param t2 second term
*/
public OrTerm(SearchTerm t1, SearchTerm t2)
{
terms = new SearchTerm[2];
terms[0] = t1;
terms[1] = t2;
}
/**
* Constructor that takes an array of SearchTerms.
*/
public OrTerm(SearchTerm[] t)
{
terms = new SearchTerm[t.length];
System.arraycopy(t, 0, terms, 0, t.length);
}
/**
* Return the search terms.
*/
public SearchTerm[] getTerms()
{
return (SearchTerm[])terms.clone();
}
/**
* The OR operation.
* <p>
* The terms specified in the constructor are applied to the given object
* and the OR operator is applied to their results.
* @param msg The specified SearchTerms are applied to this Message
* and the OR operator is applied to their results.
* @return true if the OR succeeds, otherwise false
*/
public boolean match(Message msg)
{
for (int i = 0; i<terms.length; i++)
{
if (terms[i].match(msg))
return true;
}
return false;
}
/**
* Equality comparison.
*/
public boolean equals(Object other)
{
if (other instanceof OrTerm)
{
OrTerm orterm = (OrTerm)other;
if (orterm.terms.length!=terms.length)
return false;
for (int i = 0; i<terms.length; i++)
{
if (!terms[i].equals(orterm.terms[i]))
return false;
}
return true;
}
return false;
}
/**
* Compute a hashCode for this object.
*/
public int hashCode()
{
int acc = 0;
for (int i = 0; i<terms.length; i++)
acc += terms[i].hashCode();
return acc;
}
}
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