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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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// $Id: Schema.java 446598 2006-09-15 12:55:40Z jeremias $
package javax.xml.validation;
/**
* Immutable in-memory representation of grammar.
*
* <p>
* This object represents a set of constraints that can be checked/
* enforced against an XML document.
*
* <p>
* A {@link Schema} object is thread safe and applications are
* encouraged to share it across many parsers in many threads.
*
* <p>
* 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.
*
* <p>
* A {@link Schema} object is usually created from {@link SchemaFactory}.
*
* <p>
* 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.
*
* <p>
* 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 <code>!schemaA.equals(schemaB)</code>.
*
* @author <a href="mailto:Kohsuke.Kawaguchi@Sun.com">Kohsuke Kawaguchi</a>
* @version $Revision: 446598 $, $Date: 2006-09-15 05:55:40 -0700 (Fri, 15 Sep 2006) $
* @see <a href="http://www.w3.org/TR/xmlschema-1/">XML Schema Part 1: Structures</a>
* @see <a href="http://www.w3.org/TR/xml11/">Extensible Markup Language (XML) 1.1</a>
* @see <a href="http://www.w3.org/TR/REC-xml">Extensible Markup Language (XML) 1.0 (Second Edition)</a>
* @since 1.5
*/
public abstract class Schema {
/**
* Constructor for the derived class.
*
* <p>
* The constructor does nothing.
*/
protected Schema() {
}
/**
* Creates a new {@link Validator} for this {@link Schema}.
*
* <p>
* 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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