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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     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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// $Id: Schema.java 446598 2006-09-15 12:55:40Z jeremias $

package javax.xml.validation;

/**
 * Immutable in-memory representation of grammar.
 *
 * 

* This object represents a set of constraints that can be checked/ * enforced against an XML document. * *

* A {@link Schema} object is thread safe and applications are * encouraged to share it across many parsers in many threads. * *

* A {@link Schema} object is immutable in the sense that it shouldn't * change the set of constraints once it is created. In other words, * if an application validates the same document twice against the same * {@link Schema}, it must always produce the same result. * *

* A {@link Schema} object is usually created from {@link SchemaFactory}. * *

* Two kinds of validators can be created from a {@link Schema} object. * One is {@link Validator}, which provides highly-level validation * operations that cover typical use cases. The other is * {@link ValidatorHandler}, which works on top of SAX for better * modularity. * *

* This specification does not refine * the {@link java.lang.Object#equals(java.lang.Object)} method. * In other words, if you parse the same schema twice, you may * still get !schemaA.equals(schemaB). * * @author Kohsuke Kawaguchi * @version $Revision: 446598 $, $Date: 2006-09-15 05:55:40 -0700 (Fri, 15 Sep 2006) $ * @see XML Schema Part 1: Structures * @see Extensible Markup Language (XML) 1.1 * @see Extensible Markup Language (XML) 1.0 (Second Edition) * @since 1.5 */ public abstract class Schema { /** * Constructor for the derived class. * *

* The constructor does nothing. */ protected Schema() { } /** * Creates a new {@link Validator} for this {@link Schema}. * *

* A validator enforces/checks the set of constraints this object * represents. * * @return * Always return a non-null valid object. */ public abstract Validator newValidator(); /** * Creates a new {@link ValidatorHandler} for this {@link Schema}. * * @return * Always return a non-null valid object. */ public abstract ValidatorHandler newValidatorHandler(); }





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