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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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package org.apache.xerces.impl.xs.identity;
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* Interface for a field activator. The field activator is responsible
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* for activating fields within a specific scope; the caller merely
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* requests the fields to be activated.
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* @author Andy Clark, IBM
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* @version $Id: FieldActivator.java,v 1.2 2009/12/10 03:18:45 matthewoliver Exp $
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public interface FieldActivator {
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// FieldActivator methods
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* Start the value scope for the specified identity constraint. This
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* method is called when the selector matches in order to initialize
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* @param identityConstraint The identity constraint.
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* @param initialDepth the depth at which the selector began matching
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public void startValueScopeFor(IdentityConstraint identityConstraint,
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* Request to activate the specified field. This method returns the
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* matcher for the field.
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* @param field The field to activate.
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* @param initialDepth the 0-indexed depth in the instance document at which the Selector began to match.
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public XPathMatcher activateField(Field field, int initialDepth);
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* Ends the value scope for the specified identity constraint.
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* @param identityConstraint The identity constraint.
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* @param initialDepth the 0-indexed depth where the Selector began to match.
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public void endValueScopeFor(IdentityConstraint identityConstraint, int initialDepth);
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} // interface FieldActivator