- /*
- * The Apache Software License, Version 1.1
- *
- *
- * Copyright (c) 2001, 2002 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xerces" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation and was
- * originally based on software copyright (c) 1999, International
- * Business Machines, Inc., http://www.apache.org. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
-
- package com.sun.org.apache.xerces.internal.dom;
-
- import java.util.StringTokenizer;
- import java.util.Vector;
- import org.w3c.dom.DOMImplementationList;
- import org.w3c.dom.DOMImplementationSource;
- import org.w3c.dom.DOMImplementation;
- import com.sun.org.apache.xerces.internal.dom.DOMImplementationListImpl;
-
- /**
- * Supply one the right implementation, based upon requested features. Each
- * implemented <code>DOMImplementationSource</code> object is listed in the
- * binding-specific list of available sources so that its
- * <code>DOMImplementation</code> objects are made available.
- *
- * <p>See also the <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407/core.html#DOMImplementationSource'>Document Object Model (DOM) Level 3 Core Specification</a>.
- *
- * @version $Id: DOMImplementationSourceImpl.java,v 1.15 2004/04/23 21:45:04 mrglavas Exp $
- */
- public class DOMImplementationSourceImpl
- implements DOMImplementationSource {
-
- /**
- * A method to request a DOM implementation.
- * @param features A string that specifies which features are required.
- * This is a space separated list in which each feature is specified
- * by its name optionally followed by a space and a version number.
- * This is something like: "XML 1.0 Traversal Events 2.0"
- * @return An implementation that has the desired features, or
- * <code>null</code> if this source has none.
- */
- public DOMImplementation getDOMImplementation(String features) {
- // first check whether the CoreDOMImplementation would do
- DOMImplementation impl =
- CoreDOMImplementationImpl.getDOMImplementation();
- if (testImpl(impl, features)) {
- return impl;
- }
- // if not try the DOMImplementation
- impl = DOMImplementationImpl.getDOMImplementation();
- if (testImpl(impl, features)) {
- return impl;
- }
-
- return null;
- }
-
- /**
- * A method to request a list of DOM implementations that support the
- * specified features and versions, as specified in .
- * @param features A string that specifies which features and versions
- * are required. This is a space separated list in which each feature
- * is specified by its name optionally followed by a space and a
- * version number. This is something like: "XML 3.0 Traversal +Events
- * 2.0"
- * @return A list of DOM implementations that support the desired
- * features.
- */
- public DOMImplementationList getDOMImplementationList(String features) {
- // first check whether the CoreDOMImplementation would do
- DOMImplementation impl = CoreDOMImplementationImpl.getDOMImplementation();
- final Vector implementations = new Vector();
- if (testImpl(impl, features)) {
- implementations.addElement(impl);
- }
- impl = DOMImplementationImpl.getDOMImplementation();
- if (testImpl(impl, features)) {
- implementations.addElement(impl);
- }
-
- return new DOMImplementationListImpl(implementations);
- }
-
- boolean testImpl(DOMImplementation impl, String features) {
-
- StringTokenizer st = new StringTokenizer(features);
- String feature = null;
- String version = null;
-
- if (st.hasMoreTokens()) {
- feature = st.nextToken();
- }
- while (feature != null) {
- boolean isVersion = false;
- if (st.hasMoreTokens()) {
- char c;
- version = st.nextToken();
- c = version.charAt(0);
- switch (c) {
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- isVersion = true;
- }
- } else {
- version = null;
- }
- if (isVersion) {
- if (!impl.hasFeature(feature, version)) {
- return false;
- }
- if (st.hasMoreTokens()) {
- feature = st.nextToken();
- } else {
- feature = null;
- }
- } else {
- if (!impl.hasFeature(feature, null)) {
- return false;
- }
- feature = version;
- }
- }
- return true;
- }
- }