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Contains the entire NEBA core implementation, i.e. the framework that interprets the NEBA API annotations and provides implementations for the service and lifecycle callback interfaces provided in the NEBA API. This package must not export anything as its implementation details are entirely private.

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/**
 * Copyright 2013 the original author or 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 io.neba.core.util;

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

/**
 * Unlike {@link java.io.StringWriter}, this {@link Writer} does not rely on a synchronized
 * {@link StringBuffer} but on the efficient {@link StringBuilder}.

 * It is important to {@link #FastStringWriter(int)} initialize this writer with
 * the suitable capacity (=amount of expected characters) in order to maintain performance.
 * 
 * @author Olaf Otto
 */
public class FastStringWriter extends Writer {
	private final StringBuilder builder;
	
	public FastStringWriter() {
		this(512);
	}
	
	public FastStringWriter(int initialCapacity) {
		builder =  new StringBuilder(initialCapacity);
		lock = builder;
	}

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

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

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

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

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

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

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

	@Override
	public void close() throws IOException {
	}

	@Override
	public void flush() throws IOException {
	}

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

	public String toString() {
		return builder.toString();
	}
	
	/**
	 * @return The underlying builder of this writer, never null.
	 */
	public StringBuilder getBuilder() {
	    return this.builder;
	}
}