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Concourse is a self-tuning database that is designed for both ad hoc analytics and high volume transactions at scale. Developers use Concourse to quickly build mission critical software while also benefiting from real time insight into their most important data. With Concourse, end-to-end data management requires no extra infrastructure, no prior configuration and no additional coding–all of which greatly reduce costs and allow developers to focus on core business problems.

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/*
 * Copyright (c) 2013-2019 Cinchapi Inc.
 *
 * 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.cinchapi.concourse.util;

import java.io.IOException;
import java.io.Writer;

import javax.annotation.concurrent.NotThreadSafe;

/**
 * An single threaded alternative to the {@link java.io.StringWriter native
 * StringWriter} that is more efficient because it uses a {@link StringBuilder}.
 * 
 * @author Jeff Nelson
 */
@NotThreadSafe
public class StringBuilderWriter extends Writer {

    /**
     * Construct a new instance that writes to the specified
     * {@link StringBuilder builder}.
     * 
     * @param builder the destination for this writer
     */
    public StringBuilderWriter(StringBuilder builder) {
        this.sb = builder;
    }

    /**
     * Construct a new instance that writes to a new {@link StringBuilder}.
     */
    public StringBuilderWriter() {
        this(new StringBuilder());
    }

    /**
     * The {@link StringBuilder} to where this Writer sends characters.
     */
    private final StringBuilder sb;

    @Override
    public Writer append(char c) throws IOException {
        sb.append(c);
        return this;
    }

    @Override
    public Writer append(CharSequence csq) throws IOException {
        sb.append(csq);
        return this;
    }

    @Override
    public Writer append(CharSequence csq, int start, int end)
            throws IOException {
        sb.append(csq, start, end);
        return this;
    }

    @Override
    public void close() throws IOException {/* noop */}

    @Override
    public void flush() throws IOException {/* noop */}

    @Override
    public void write(char[] cbuf) throws IOException {
        sb.append(cbuf);
    }

    @Override
    public void write(char[] cbuf, int off, int len) throws IOException {
        sb.append(cbuf, off, len);

    }

    @Override
    public void write(int c) throws IOException {
        sb.append((char) c);
    }

    @Override
    public void write(String str) throws IOException {
        sb.append(str);
    }

    @Override
    public void write(String str, int off, int len) throws IOException {
        sb.append(str, off, len);
    }

    @Override
    public String toString() {
        return sb.toString();
    }

}