/*
    * Copyright (C) 2012 The Guava Authors
    *
    * 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 com.google.common.io;
  
  import static com.google.common.base.Charsets.UTF_8;
  
  import java.io.FilterWriter;
  import java.io.IOException;
  import java.io.OutputStreamWriter;
  import java.io.Writer;
  
  /**
   * A char sink for testing that has configurable behavior.
   *
   * @author Colin Decker
   */
  public class TestCharSink extends CharSink implements TestStreamSupplier {
  
    private final TestByteSink byteSink;
  
    public TestCharSink(TestOption... options) {
      this.byteSink = new TestByteSink(options);
    }
  
    public String getString() {
      return new String(byteSink.getBytes(), UTF_8);
    }
  
    @Override
    public boolean wasStreamOpened() {
      return byteSink.wasStreamOpened();
    }
  
    @Override
    public boolean wasStreamClosed() {
      return byteSink.wasStreamClosed();
    }
  
    @Override
    public Writer openStream() throws IOException {
      // using TestByteSink's output stream to get option behavior, so flush to it on every write
      return new FilterWriter(new OutputStreamWriter(byteSink.openStream(), UTF_8)) {
        @Override
        public void write(int c) throws IOException {
          super.write(c);
          flush();
        }
  
        @Override
        public void write(char[] cbuf, int off, int len) throws IOException {
          super.write(cbuf, off, len);
          flush();
        }
  
        @Override
        public void write(String str, int off, int len) throws IOException {
          super.write(str, off, len);
          flush();
        }
      };
    }
  }