javax.xml.parsers.DocumentBuilder Maven / Gradle / Ivy

/*
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program 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.
 * 
 * This program 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 at /legal/license.txt).
 * 
 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions.
 */

package javax.xml.parsers;

import java.io.InputStream;
import java.io.IOException;

import org.w3c.dom.Document;
import org.w3c.dom.DOMImplementation;

import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

/**
 * Defines the API to obtain DOM Document instances from an XML
 * document. Using this class, an application programmer can obtain a
 * {@link Document} from XML.
 *
 * An instance of this class can be obtained from the
 * {@link DocumentBuilderFactory#newDocumentBuilder()} method. Once
 * an instance of this class is obtained, XML can be parsed from a
 * variety of input sources. These input sources are InputStreams
 * and SAX InputSources.
 *
 * Note that this class reuses several classes from the SAX API. This
 * does not require that the implementor of the underlying DOM
 * implementation use a SAX parser to parse XML document into a
 * Document. It merely requires that the implementation
 * communicate with the application using these existing APIs.
 */

public abstract class DocumentBuilder
{
    /** Protected constructor */
    protected DocumentBuilder()
    {
    }

    /**
     * Parse the content of the given InputStream as an XML
     * document and return a new DOM {@link Document} object.
     * An IllegalArgumentException is thrown if the
     * InputStream is null.
     *
     * @param is InputStream containing the content to be parsed.
     * @return Document result of parsing the
     *  InputStream
     * @exception IOException If any IO errors occur.
     * @exception SAXException If any parse errors occur.
     */

    public Document parse(InputStream is)
        throws SAXException, IOException 
    {
        if (is == null) {
            throw new IllegalArgumentException("InputStream cannot be null");
        }

        InputSource in = new InputSource(is);
        return parse(in);
    }

    /**
     * Parse the content of the given input source as an XML document
     * and return a new DOM {@link Document} object.
     * An IllegalArgumentException is thrown if the
     * InputSource is null null.
     *
     * @param is InputSource containing the content to be parsed.
     * @exception IOException If any IO errors occur.
     * @exception SAXException If any parse errors occur.
     * @return A new DOM Document object.
     */

    public abstract Document parse(InputSource is)
        throws  SAXException, IOException;

    /**
     * Indicates whether or not this parser is configured to
     * understand namespaces.
     *
     * @return true if this parser is configured to understand
     *         namespaces; false otherwise.
     */

    public abstract boolean isNamespaceAware();

    /**
     * Indicates whether or not this parser is configured to
     * validate XML documents.
     *
     * @return true if this parser is configured to validate
     *         XML documents; false otherwise.
     */

    public abstract boolean isValidating();

    /**
     * Specify the {@link EntityResolver} to be used to resolve
     * entities present in the XML document to be parsed. Setting
     * this to null will result in the underlying
     * implementation using it's own default implementation and
     * behavior.
     *
     * @param er The EntityResolver to be used to resolve entities
     *           present in the XML document to be parsed.
     */

    public abstract void setEntityResolver(EntityResolver er);

    /**
     * Specify the {@link ErrorHandler} to be used by the parser.
     * Setting this to null will result in the underlying
     * implementation using it's own default implementation and
     * behavior.
     *
     * @param eh The ErrorHandler to be used by the parser.
     */

    public abstract void setErrorHandler(ErrorHandler eh);

    /**
     * Obtain a new instance of a DOM {@link Document} object
     * to build a DOM tree with.
     *
     * @return A new instance of a DOM Document object.
     */

    public abstract Document newDocument();

    /**
     * Obtain an instance of a {@link DOMImplementation} object.
     *
     * @return A new instance of a DOMImplementation.
     */

    public abstract DOMImplementation getDOMImplementation();
}