/*
 * Copyright (C) 2007-2012 Argeo GmbH
 *
 * 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 org.argeo.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;

/** Utilities to be used when APache COmmons IO is not available. */
class StreamUtils {
	private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;

	/*
	 * APACHE COMMONS IO (inspired)
	 */

	/** @return the number of bytes */
	public static Long copy(InputStream in, OutputStream out)
			throws IOException {
		Long count = 0l;
		byte[] buf = new byte[DEFAULT_BUFFER_SIZE];
		while (true) {
			int length = in.read(buf);
			if (length < 0)
				break;
			out.write(buf, 0, length);
			count = count + length;
		}
		return count;
	}

	/** @return the number of chars */
	public static Long copy(Reader in, Writer out) throws IOException {
		Long count = 0l;
		char[] buf = new char[DEFAULT_BUFFER_SIZE];
		while (true) {
			int length = in.read(buf);
			if (length < 0)
				break;
			out.write(buf, 0, length);
			count = count + length;
		}
		return count;
	}

	public static void closeQuietly(InputStream in) {
		if (in != null)
			try {
				in.close();
			} catch (Exception e) {
				//
			}
	}

	public static void closeQuietly(OutputStream out) {
		if (out != null)
			try {
				out.close();
			} catch (Exception e) {
				//
			}
	}

	public static void closeQuietly(Reader in) {
		if (in != null)
			try {
				in.close();
			} catch (Exception e) {
				//
			}
	}

	public static void closeQuietly(Writer out) {
		if (out != null)
			try {
				out.close();
			} catch (Exception e) {
				//
			}
	}
}