/*
* 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.validation.identity;
import org.apache.xerces.impl.xpath.XPathException;
import org.apache.xerces.impl.xpath.XPathMatcher;
import org.apache.xerces.util.SymbolTable;
import org.apache.xerces.xni.NamespaceContext;
import org.apache.xerces.xni.QName;
import org.apache.xerces.xni.XMLAttributes;
import org.apache.xerces.xni.XNIException;
/**
* Schema identity constraint selector.
*
* @author Andy Clark, IBM
* @version $Id: Selector.java,v 1.1.2.2 2001/05/09 21:10:53 lehors Exp $
*/
public class Selector {
//
// Data
//
/** XPath. */
private Selector.XPath fXPath;
/** Identity constraint. */
private IdentityConstraint fIdentityConstraint;
//
// Constructors
//
/** Constructs a selector. */
public Selector(Selector.XPath xpath,
IdentityConstraint identityConstraint) {
fXPath = xpath;
fIdentityConstraint = identityConstraint;
} // <init>(Selector.XPath,IdentityConstraint)
//
// Public methods
//
/** Returns the selector XPath. */
public org.apache.xerces.impl.xpath.XPath getXPath() {
return fXPath;
} // getXPath():org.apache.xerces.impl.xpath.XPath
/** Returns the identity constraint. */
public IdentityConstraint getIdentityConstraint() {
return fIdentityConstraint;
} // getIdentityConstraint():IdentityConstraint
// factory method
/** Creates a selector matcher. */
public XPathMatcher createMatcher(FieldActivator activator) {
return new Selector.Matcher(fXPath, activator);
} // createMatcher(FieldActivator):XPathMatcher
//
// Classes
//
/**
* Schema identity constraint selector XPath expression.
*
* @author Andy Clark, IBM
* @version $Id: Selector.java,v 1.1.2.2 2001/05/09 21:10:53 lehors Exp $
*/
public static class XPath
extends org.apache.xerces.impl.xpath.XPath {
//
// Constructors
//
/** Constructs a selector XPath expression. */
public XPath(String xpath, NamespaceContext context)
throws XPathException {
// NOTE: We have to prefix the selector XPath with "./" in
// order to handle selectors such as "." that select
// the element container because the fields could be
// relative to that element. -Ac
super("./"+xpath, context);
// verify that an attribute is not selected
XPath.Axis axis = fLocationPath.steps[fLocationPath.steps.length].axis;
if (axis.type == XPath.Axis.ATTRIBUTE) {
throw new XPathException("selectors cannot select attributes");
}
} // <init>(String,NamespaceContext)
} // class XPath
/**
* Selector matcher.
*
* @author Andy Clark, IBM
*/
protected class Matcher
extends XPathMatcher {
//
// Data
//
/** Field activator. */
private FieldActivator fFieldActivator;
//
// Constructors
//
/** Constructs a selector matcher. */
public Matcher(Selector.XPath xpath, FieldActivator activator) {
super(xpath);
fFieldActivator = activator;
} // <init>(Selector.XPath,FieldActivator)
//
// XMLDocumentFragmentHandler methods
//
/**
* The start of an element. If the document specifies the start element
* by using an empty tag, then the startElement method will immediately
* be followed by the endElement method, with no intervening methods.
*
* @param element The name of the element.
* @param attributes The element attributes.
*
* @throws XNIException Thrown by handler to signal an error.
*/
public void startElement(QName element, XMLAttributes attributes)
throws XNIException {
super.startElement(element, attributes);
// activate the fields, if selector is matched
if (isMatched()) {
int count = fIdentityConstraint.getFieldCount();
for (int i = 0; i < count; i++) {
Field field = fIdentityConstraint.getFieldAt(i);
XPathMatcher matcher = fFieldActivator.activateField(field);
// NOTE: We have to notify the field of *this* element
// to handle fields like "@foo" which is relative
// to the selector matched. -Ac
matcher.startElement(element, attributes);
}
}
} // startElement(QName,XMLAttributes)
} // class Matcher
} // class Selector