/*
* 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.
*/
package mf.org.apache.xerces.dom;
import java.util.ArrayList;
import mf.org.apache.xerces.impl.xs.XSImplementationImpl;
import mf.org.w3c.dom.DOMImplementation;
import mf.org.w3c.dom.DOMImplementationList;
/**
* Allows to retrieve <code>XSImplementation</code>, DOM Level 3 Core and LS implementations
* and PSVI implementation.
* <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>.
*
* @xerces.internal
*
* @author Elena Litani, IBM
* @version $Id: DOMXSImplementationSourceImpl.java 603686 2007-12-12 17:51:23Z mrglavas $
*/
public class DOMXSImplementationSourceImpl
extends DOMImplementationSourceImpl {
/**
* 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) {
DOMImplementation impl = super.getDOMImplementation(features);
if (impl != null){
return impl;
}
// if not try the PSVIDOMImplementation
impl = PSVIDOMImplementationImpl.getDOMImplementation();
if (testImpl(impl, features)) {
return impl;
}
// if not try the XSImplementation
impl = XSImplementationImpl.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) {
final ArrayList implementations = new ArrayList();
// first check whether the CoreDOMImplementation would do
DOMImplementationList list = super.getDOMImplementationList(features);
// Add core DOMImplementations
for (int i = 0; i < list.getLength(); ++i) {
implementations.add(list.item(i));
}
DOMImplementation impl = PSVIDOMImplementationImpl.getDOMImplementation();
if (testImpl(impl, features)) {
implementations.add(impl);
}
impl = XSImplementationImpl.getDOMImplementation();
if (testImpl(impl, features)) {
implementations.add(impl);
}
return new DOMImplementationListImpl(implementations);
}
}