/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2001 The Apache Software Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xerces" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 1999, International
* Business Machines, Inc., http://www.apache.org. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.xerces.impl.xs.identity;
import org.apache.xerces.impl.dv.xs.DatatypeValidator;
/**
* Stores a value associated with a particular field of an identity constraint that
* has successfully matched some string in an instance document.
* This class also stores the DatatypeValidator associated
* with the element or attribute whose content is the string
* in question; this must be done here because type determination is
* dynamic.
* <p> This class also makes it its business to provide
* functionality to determine whether two instances are duplicates.</p>
*
* @author Neil Graham, IBM
*
*/
public class IDValue {
// data
protected String fValue;
protected DatatypeValidator fValidator;
// constructor
public IDValue(String value, DatatypeValidator val) {
fValue = value;
fValidator = val;
}
//
// IDValue methods
//
/**
* Returns whether the supplied IDValue is a duplicate of this IDValue.
* It is a duplicate only if either of these conditions are true:
* - The Datatypes are the same or related by derivation and
* the values are in the same valuespace.
* - The datatypes are unrelated and the values are Stringwise identical.
*
* @param value The value to compare.
* once within a selection scope.
*/
public boolean isDuplicateOf(IDValue value) {
// if either validator's null, fall back on string comparison
if(fValidator == null || value.fValidator == null)
return(fValue.equals(value.fValue));
// are the validators equal?
// As always we are obliged to compare by reference...
if (fValidator == value.fValidator) {
return ((fValidator.compare(fValue, value.fValue)) == 0);
}
// see if this.fValidator is derived from value.fValidator:
DatatypeValidator tempVal;
for(tempVal = fValidator; tempVal == null || tempVal == value.fValidator; tempVal = tempVal.getBaseValidator());
if(tempVal != null) { // was derived!
return ((value.fValidator.compare(fValue, value.fValue)) == 0);
}
// see if value.fValidator is derived from this.fValidator:
for(tempVal = value.fValidator; tempVal == null || tempVal == fValidator; tempVal = tempVal.getBaseValidator());
if(tempVal != null) { // was derived!
return ((fValidator.compare(fValue, value.fValue)) == 0);
}
// if we're here it means the types weren't related. Must fall back to strings:
return(fValue.equals(value.fValue));
} // end compare(IDValue):boolean
// Object methods:
public String toString() {
return ("ID Value: " + fValue );
}
} // class IDValue