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Common utility libraries for the MEG @ Work projects

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/**
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   This file is part of the LDP4j Project:
 *     http://www.ldp4j.org/
 *
 *   Center for Open Middleware
 *     http://www.centeropenmiddleware.com/
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   Copyright (C) 2014-2016 Center for Open Middleware.
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   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.
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   Artifact    : org.ldp4j.commons:ldp4j-commons-core:0.2.2
 *   Bundle      : ldp4j-commons-core-0.2.2.jar
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 */
package org.ldp4j.commons;

import java.util.Arrays;

public final class IndentUtils {

	public static final String NL = System.getProperty("line.separator");

	private static final int MAX_INDENTATION = 128;
	private static final char TAB ='\t';
	private static final char[] TABS=new char[MAX_INDENTATION];

	static {
		Arrays.fill(TABS, TAB);
	}

	private int level=0;

	public IndentUtils() {
		this(0);
	}

	public IndentUtils(int level) {
		this.level=level;
		if(level<0) {
			this.level=0;
		}
	}

	private static String tab(int level) {
		return new String(TABS,0,level);
	}

	public void increase() {
		level++;
	}

	public String indent() {
		return IndentUtils.tab(level);
	}

	public void decrease() {
		if(level>0) {
			level--;
		}
	}

}