| /* Copyright 2004 The Apache Software Foundation |
| * |
| * Licensed 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.xmlbeans.impl.common; |
| |
| import java.io.*; |
| |
| public class ReaderInputStream extends PushedInputStream { |
| public static final int defaultBufferSize = 2048; |
| |
| private final Reader reader; |
| private final Writer writer; |
| private final char[] buf; |
| |
| public ReaderInputStream(Reader reader, String encoding) throws UnsupportedEncodingException { |
| this(reader, encoding, defaultBufferSize); |
| } |
| |
| public ReaderInputStream(Reader reader, String encoding, int bufferSize) throws UnsupportedEncodingException { |
| if (bufferSize <= 0) { |
| throw new IllegalArgumentException("Buffer size <= 0"); |
| } |
| |
| this.reader = reader; |
| this.writer = new OutputStreamWriter(getOutputStream(), encoding); |
| buf = new char[bufferSize]; |
| } |
| |
| public void fill(int requestedBytes) throws IOException { |
| do { |
| int chars = reader.read(buf); |
| if (chars < 0) { |
| return; |
| } |
| |
| writer.write(buf, 0, chars); |
| writer.flush(); |
| } |
| while (available() <= 0); // loop for safety, in case encoding didn't produce any bytes yet |
| } |
| } |