| /* |
| * 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.openejb.util; |
| |
| import org.codehaus.swizzle.stream.ScanBuffer; |
| |
| import java.io.FilterOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * @version $Rev$ $Date$ |
| */ |
| public class OutputScanner extends FilterOutputStream { |
| |
| private final CountDownLatch found = new CountDownLatch(1); |
| |
| public OutputScanner(OutputStream out, String scanString) { |
| super(null); |
| this.out = new Scan(out, scanString); |
| } |
| |
| public class Scan extends FilterOutputStream { |
| |
| private final ScanBuffer scan; |
| |
| public Scan(OutputStream out, String scanString) { |
| super(out); |
| scan = new ScanBuffer(scanString); |
| } |
| |
| @Override |
| public void write(int b) throws IOException { |
| check(b); |
| super.write(b); |
| } |
| |
| @Override |
| public void write(byte[] bytes) throws IOException { |
| for (byte b : bytes) { |
| check(b); |
| } |
| super.write(bytes); |
| } |
| |
| @Override |
| public void write(byte[] bytes, int off, int len) throws IOException { |
| for (int i = off; i < len; i++) { |
| check(bytes[i]); |
| } |
| super.write(bytes, off, len); |
| } |
| |
| private void check(int b) { |
| scan.append(b); |
| if (scan.match()) { |
| // Cut ourselves out of the call chain. |
| // |
| // This works because |
| // - ScanningOutputStreamFilter.this.out == this |
| // - this.out != this) |
| // |
| // Our parent is delegating to us and we are delegating |
| // to the actual OutputStream |
| // |
| // To cut ourselves out of the call chain and eliminate |
| // the overhead of checking the ScanBuffer, we set our |
| // parent to not delegate to us and to instead delegate |
| // to the actual OutputStream. |
| |
| // Intellij mistakenly shows this grayed out, |
| // however it is very very significant. |
| OutputScanner.this.out = this.out; |
| found.countDown(); |
| } |
| } |
| } |
| |
| |
| public void await() throws InterruptedException { |
| found.await(); |
| } |
| |
| public boolean await(long timeout, TimeUnit unit) throws InterruptedException { |
| return found.await(timeout, unit); |
| } |
| } |