/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 */

/*

 * Copyright (c) 1999 by Sun Microsystems, Inc.

 * All rights reserved.

 *

 */

//  AttributeString.java: Model an Attribute value string.

//  Author:           James Kempf

//  Created On:       Wed Apr  8 10:40:03 1998

//  Last Modified By: James Kempf

//  Last Modified On: Wed Jul 29 15:21:32 1998

//  Update Count:     16

//

package com.sun.slp;

import java.util.*;

import java.io.*;

/**

 * The AttributeString class embodies the SLP lower cased, space compressed

 * string matching rules. It precomputes an 

 * efficient string for matching, squeezing out whitespace and lower casing. 

 * The toString() method returns the original string. Note that it does

 * NOT handle pattern wildcard matching. 

 *

 * @author James Kempf

 */

class AttributeString extends Object {

    String string;		// the original string.

    String cstring;		// whitespace separated, lower cased parts.

    Locale locale;		// the locale in which this string was created.

    // Create an attribute string. Use the passed in locale to determine

    //  the lower casing rules.

    AttributeString(String str, Locale nlocale) {

	string = str;

	locale = nlocale;

	cstring = parse(str, nlocale);

    }

    // Parse the string into whitespace separated, lower cased parts.

    private String parse(String str, Locale nlocale) {

	StringBuffer buf = new StringBuffer();

	StringTokenizer tk = 

	    new StringTokenizer(str, ServiceLocationAttribute.WHITESPACE);

	while (tk.hasMoreTokens()) {

	    buf.append(tk.nextToken().toLowerCase(nlocale));

	    buf.append(ServiceLocationAttribute.SPACE);

	}

	return buf.toString().trim();

    }

    //

    // Comparison operations.

    //

    // For compatibility with AttributePattern.

    public boolean match(AttributeString str) {

	return equals(str);

    }

    public boolean lessEqual(AttributeString str) {

	return (cstring.compareTo(str.cstring) <= 0);

    }

    public boolean greaterEqual(AttributeString str) {

	return (cstring.compareTo(str.cstring) >= 0);

    }

    //

    // Object overrides.

    //

    /**

     * Return true if obj pattern matches with this string.

     */

    public boolean equals(Object obj) {

	if (obj == this) {

	    return true;

	}

	if (!(obj instanceof AttributeString)) {

	    return false;

	}

	return cstring.equals(((AttributeString)obj).cstring);

    }

    /**

     * Return the original string.

     */

    public String toString() {

	return string;

    }

    /**

     * Hash on the computed string.

     */

    public int hashCode() {

	return cstring.toString().hashCode();

    }

}