    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017package org.apache.commons.io.output;
    018
    019import java.io.IOException;
    020import java.io.OutputStream;
    021import java.io.Writer;
    022
    023/**
    024 * OutputStream implementation that writes the data to an {@link Appendable}
    025 * Object.
    026 * <p>
    027 * For example, can be used with any {@link Writer} or a {@link StringBuilder}
    028 * or {@link StringBuffer}.
    029 * </p>
    030 *
    031 * @since 2.5
    032 * @see Appendable
    033 *
    034 * @param <T> The type of the {@link Appendable} wrapped by this AppendableOutputStream.
    035 */
    036public class AppendableOutputStream <T extends Appendable> extends OutputStream {
    037
    038    private final T appendable;
    039
    040    /**
    041     * Constructs a new instance with the specified appendable.
    042     *
    043     * @param appendable the appendable to write to
    044     */
    045    public AppendableOutputStream(final T appendable) {
    046        this.appendable = appendable;
    047    }
    048
    049    /**
    050     * Gets the target appendable.
    051     *
    052     * @return the target appendable
    053     */
    054    public T getAppendable() {
    055        return appendable;
    056    }
    057
    058    /**
    059     * Write a character to the underlying appendable.
    060     *
    061     * @param b the character to write
    062     * @throws IOException upon error
    063     */
    064    @Override
    065    public void write(final int b) throws IOException {
    066        appendable.append((char) b);
    067    }
    068
    069}