| /* |
| * 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 org.apache.myfaces.buildtools.maven2.plugin.faces.util; |
| |
| import org.xml.sax.Attributes; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.XMLReader; |
| import org.xml.sax.helpers.NamespaceSupport; |
| import org.xml.sax.helpers.XMLFilterImpl; |
| |
| /** |
| * For now, just skip the root element since that's our usecase. |
| */ |
| public final class XPointerFilter extends XMLFilterImpl |
| { |
| public XPointerFilter( |
| XMLReader parent, |
| NamespaceSupport namespaces, |
| String xpointer) |
| { |
| super(parent); |
| |
| // We support a very rudimentary - but totally sufficient - XPointer syntax, |
| // which is just /element/otherelement/otherotherelement/* |
| if (!xpointer.startsWith("/") || !xpointer.endsWith("/*")) |
| throw new IllegalArgumentException("Unsupported xpointer syntax: " + |
| xpointer); |
| |
| xpointer = xpointer.substring(0, xpointer.length() - 2).substring(1); |
| String[] elements = xpointer.split("/"); |
| int count = elements.length; |
| |
| _rootNamespaceURI = new String[count]; |
| _rootLocalName = new String[count]; |
| _acceptChildNodes = new boolean[count]; |
| |
| for (int i = 0; i < count; i++) |
| { |
| String[] parts = elements[i].split(":"); |
| String prefix = (parts.length == 1) ? "" : parts[0]; |
| String namespaceURI = namespaces.getURI(prefix); |
| _rootNamespaceURI[i] = (namespaceURI != null) ? namespaceURI : ""; |
| _rootLocalName[i] = (parts.length == 1) ? parts[0] : parts[1]; |
| _acceptChildNodes[i] = false; |
| } |
| } |
| |
| public void startElement( |
| String namespaceURI, |
| String localName, |
| String qualifiedName, |
| Attributes attributes) throws SAXException |
| { |
| if (_depth < _acceptChildNodes.length) |
| { |
| _acceptChildNodes[_depth] = |
| (_rootNamespaceURI[_depth].equals(namespaceURI) && |
| _rootLocalName[_depth].equals(localName)); |
| } |
| else if (_acceptingChildNodes()) |
| { |
| super.startElement(namespaceURI, localName, qualifiedName, attributes); |
| } |
| |
| _depth++; |
| } |
| |
| public void endElement( |
| String namespaceURI, |
| String localName, |
| String qualifiedName) throws SAXException |
| { |
| _depth--; |
| |
| if (_depth >= _acceptChildNodes.length && _acceptingChildNodes()) |
| super.endElement(namespaceURI, localName, qualifiedName); |
| } |
| |
| |
| private boolean _acceptingChildNodes() |
| { |
| for (int i = _acceptChildNodes.length - 1; i >= 0; i--) |
| { |
| if (!_acceptChildNodes[i]) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| private int _depth; |
| private boolean[] _acceptChildNodes; |
| private String[] _rootNamespaceURI; |
| private String[] _rootLocalName; |
| } |