Java example source code file (Schema.java)

This example Java source code file (Schema.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

schema, validator, validatorhandler

The Schema.java Java example source code

/*
 * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

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).
 *
 * @author <a href="mailto:Kohsuke.Kawaguchi@Sun.com">Kohsuke Kawaguchi
 * @see <a href="http://www.w3.org/TR/xmlschema-1/">XML Schema Part 1: Structures
 * @see <a href="http://www.w3.org/TR/xml11/">Extensible Markup Language (XML) 1.1
 * @see <a href="http://www.w3.org/TR/REC-xml">Extensible Markup Language (XML) 1.0 (Second Edition)
 * @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.</p>
     *
     * <p>Implementors should assure that the properties set on the
     * {@link SchemaFactory} that created this {@link Schema} are also
     * set on the {@link Validator} constructed.</p>
     *
     * @return
     *      Always return a non-null valid object.
     */
    public abstract Validator newValidator();

    /**
     * Creates a new {@link ValidatorHandler} for this {@link Schema}.
     *
     * <p>Implementors should assure that the properties set on the
     * {@link SchemaFactory} that created this {@link Schema} are also
     * set on the {@link ValidatorHandler} constructed.</p>
     *
     * @return
     *      Always return a non-null valid object.
     */
    public abstract ValidatorHandler newValidatorHandler();
}