| /* |
| * 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.netbeans.modules.html.validation; |
| |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.nio.CharBuffer; |
| import java.util.LinkedList; |
| import java.util.List; |
| import nu.validator.htmlparser.common.CharacterHandler; |
| import org.xml.sax.SAXException; |
| |
| /** |
| * |
| * @author marekfukala |
| */ |
| public class CharacterHandlerReader extends Reader { |
| |
| private List<CharacterHandler> handlers = new LinkedList<>(); |
| private boolean reading = false; |
| |
| private Reader reader; |
| |
| public CharacterHandlerReader(Reader reader) { |
| this.reader = reader; |
| } |
| |
| public void addCharacterHandler(CharacterHandler handler) { |
| handlers.add(handler); |
| } |
| |
| public boolean removeCharacterHandler(CharacterHandler handler) { |
| return handlers.remove(handler); |
| } |
| |
| @Override |
| public void mark(int readAheadLimit) throws IOException { |
| reader.mark(readAheadLimit); |
| } |
| |
| @Override |
| public int read() throws IOException { |
| reading(); |
| |
| int read = reader.read(); |
| characters(new char[]{(char) read}, 0, 1); |
| return read; |
| } |
| |
| @Override |
| public int read(char[] cbuf, int off, int len) throws IOException { |
| reading(); |
| |
| int read = reader.read(cbuf, off, len); |
| characters(cbuf, off, len); |
| return read; |
| } |
| |
| @Override |
| public void reset() throws IOException { |
| reader.reset(); |
| } |
| |
| @Override |
| public long skip(long ns) throws IOException { |
| return reader.skip(ns); |
| } |
| |
| //implementation copied from the StringReader |
| @Override |
| public int read(CharBuffer target) throws IOException { |
| reading(); |
| |
| int len = target.remaining(); |
| char[] cbuf = new char[len]; |
| int n = read(cbuf, 0, len); |
| if (n > 0) { |
| characters(cbuf, 0, n); |
| } |
| target.put(cbuf, 0, n); |
| return n; |
| } |
| |
| @Override |
| public int read(char[] cbuf) throws IOException { |
| return read(cbuf, 0, cbuf.length); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| reader.close(); |
| end(); |
| } |
| |
| private void characters(char[] chars, int offset, int len) throws IOException { |
| assert chars != null; |
| assert chars.length > 0; |
| assert offset >= 0; |
| assert len > 0; |
| |
| try { |
| for (CharacterHandler handler : handlers) { |
| handler.characters(chars, offset, len); |
| } |
| } catch (SAXException ex) { |
| throw new IOException(ex); |
| } |
| |
| } |
| |
| private void start() throws IOException { |
| try { |
| for (CharacterHandler handler : handlers) { |
| handler.start(); |
| } |
| } catch (SAXException ex) { |
| throw new IOException(ex); |
| } |
| } |
| |
| private void end() { |
| try { |
| for (CharacterHandler handler : handlers) { |
| handler.end(); |
| } |
| } catch (SAXException ex) { |
| throw new RuntimeException(ex); |
| } |
| } |
| |
| private void reading() throws IOException { |
| if(!reading) { |
| start(); |
| reading = true; |
| } |
| } |
| } |