https://xerces.apache.org/xerces2-j/: Xerces2 is the next generation of high performance, fully compliant XML parsers in the Apache Xerces family. This new version of Xerces introduces the Xerces Native Interface (XNI), a complete framework for building parser components and configurations that is extremely modular and easy to program. The Apache Xerces2 parser is the reference implementation of XNI but other parser components, configurations, and parsers can be written using the Xerces Native Interface. For complete design and implementation documents, refer to the XNI Manual. Xerces2 is a fully conforming XML Schema 1.0 processor. A partial experimental implementation of the XML Schema 1.1 Structures and Datatypes Working Drafts (December 2009) and an experimental implementation of the XML Schema Definition Language (XSD): Component Designators (SCD) Candidate Recommendation (January 2010) are provided for evaluation. For more information, refer to the XML Schema page. Xerces2 also provides a complete implementation of the Document Object Model Level 3 Core and Load/Save W3C Recommendations and provides a complete implementation of the XML Inclusions (XInclude) W3C Recommendation. It also provides support for OASIS XML Catalogs v1.1. Xerces2 is able to parse documents written according to the XML 1.1 Recommendation, except that it does not yet provide an option to enable normalization checking as described in section 2.13 of this specification. It also handles namespaces according to the XML Namespaces 1.1 Recommendation, and will correctly serialize XML 1.1 documents if the DOM level 3 load/save APIs are in use. 
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 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
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 * The ASF licenses this file to You under the Apache License, Version 2.0
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 *      http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.xerces.impl.xs.identity;



Interface for a field activator. The field activator is responsible
for activating fields within a specific scope; the caller merely
requests the fields to be activated.

Author:Andy Clark, IBM
@xerces.internal
Version:$Id: FieldActivator.java 520039 2007-03-19 18:34:38Z mrglavas $
/**
 * Interface for a field activator. The field activator is responsible
 * for activating fields within a specific scope; the caller merely
 * requests the fields to be activated.
 *
 * @xerces.internal 
 *
 * @author Andy Clark, IBM
 *
 * @version $Id: FieldActivator.java 520039 2007-03-19 18:34:38Z mrglavas $
 */
public interface FieldActivator {
    
    //
    // FieldActivator methods
    //

    
Start the value scope for the specified identity constraint. This 
method is called when the selector matches in order to initialize 
the value store.

Params:
  • identityConstraint – The identity constraint.
  • initialDepth –  the depth at which the selector began matching
/**
     * Start the value scope for the specified identity constraint. This 
     * method is called when the selector matches in order to initialize 
     * the value store.
     *
     * @param identityConstraint The identity constraint.
     * @param initialDepth  the depth at which the selector began matching
     */
    public void startValueScopeFor(IdentityConstraint identityConstraint,
            int initialDepth);

    
Request to activate the specified field. This method returns the
matcher for the field.

Params:
  • field – The field to activate.
  • initialDepth – the 0-indexed depth in the instance document at which the Selector began to match.
/** 
     * Request to activate the specified field. This method returns the
     * matcher for the field.
     *
     * @param field The field to activate.
     * @param initialDepth the 0-indexed depth in the instance document at which the Selector began to match.
     */
    public XPathMatcher activateField(Field field, int initialDepth);

    
Ends the value scope for the specified identity constraint.

Params:
  • identityConstraint – The identity constraint.
  • initialDepth –  the 0-indexed depth where the Selector began to match.
/**
     * Ends the value scope for the specified identity constraint.
     *
     * @param identityConstraint The identity constraint.
     * @param initialDepth  the 0-indexed depth where the Selector began to match.
     */
    public void endValueScopeFor(IdentityConstraint identityConstraint, int initialDepth);

} // interface FieldActivator