| /* |
| * 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.cocoon.forms.generation; |
| |
| import org.apache.cocoon.forms.FormsConstants; |
| import org.apache.cocoon.xml.AbstractXMLPipe; |
| import org.xml.sax.Attributes; |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.helpers.DefaultHandler; |
| |
| /** |
| * A filter for selection lists, that keeps only those items that start with a given filter value. |
| * |
| * @since 2.1.8 |
| * @version $Id$ |
| */ |
| public class SelectionListFilter extends AbstractXMLPipe { |
| |
| private ContentHandler next; |
| private int filterDepth = 0; |
| private int depth = 0; |
| private String filterValue; |
| private static final ContentHandler NULL_HANDLER = new DefaultHandler(); |
| |
| public SelectionListFilter(String filterValue, ContentHandler next) { |
| this.next = next; |
| this.setContentHandler(next); |
| this.filterValue = filterValue; |
| } |
| |
| public void startElement(String uri, String loc, String raw, Attributes a) throws SAXException { |
| depth++; |
| |
| if (uri.equals(FormsConstants.INSTANCE_NS) && loc.equals("item")) { |
| String value = a.getValue("value"); |
| if (!value.startsWith(this.filterValue)) { |
| filterDepth = depth; |
| setContentHandler(NULL_HANDLER); |
| } |
| } |
| |
| super.startElement(uri, loc, raw, a); |
| } |
| |
| public void endElement(String uri, String loc, String raw) throws SAXException { |
| super.endElement(uri, loc, raw); |
| |
| if (depth == filterDepth) { |
| filterDepth = 0; |
| setContentHandler(this.next); |
| } |
| |
| depth--; |
| } |
| } |