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Lifecycle AOP Framework. Enabling describe enhanced State Diagram with Java language, and processing relational Lifecycle constraints(including: state validations, transitions validations), concurrency, lifecycle callbacks, lifecycle events implicitely with Lifecycle Engine. This engine can be used by class load time (Java Instrumentation) or compile time (Lifecycle-StaticWeaver-maven-plugin).

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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright (c) 2013-2020 Madz. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License"). You
 * may not use this file except in compliance with the License. You can
 * obtain a copy of the License at
 * https://raw.github.com/zhongdj/Lifecycle/master/License.txt
 * . See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 * 
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 * 
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license." If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above. However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */
package net.imadz.common;


import java.util.*;


/**
 * Represents a hierarchical name in which each level is separated by a dot.
 * This class is loosely modeled after java.io.File
 */
public class DottedPath implements Iterable {

    private final DottedPath parent;
    private final String name, absoluteName;
    private List paths;

    /** Constructor */
    public DottedPath(String name) {
        this(null, name);
    }

    private DottedPath(DottedPath parent, String name) {
        this.parent = parent;
        this.name = name;
        this.absoluteName = null != this.parent ? this.parent.absoluteName + "." + this.name : this.name;
        this.paths = makePaths();
    }

    private List makePaths() {
        if ( null == this.parent) {
			final ArrayList arrayList = new ArrayList();
			arrayList.add(this.name);
			return arrayList;
		}
        List paths = new ArrayList(this.parent.paths);
        paths.add(this.name);
        return paths;
    }

    public static DottedPath parse(String path) {
        List segments = Arrays.asList(path.split("\\."));
        DottedPath head = new DottedPath(segments.get(0));
        List tail = segments.subList(1, segments.size());
        return head.append(tail);
    }

    public static DottedPath append(DottedPath parent, String segment) {
        return parent != null ? parent.append(segment) : new DottedPath(segment);
    }

    public DottedPath append(String segment) {
        return new DottedPath(this, segment);
    }

    public DottedPath append(List segments) {
        if ( segments.isEmpty() ) {
            return this;
        }
        return this.append(segments.get(0)).append(segments.subList(1, segments.size()));
    }

    @Override
    public boolean equals(Object obj) {
        return ( obj instanceof DottedPath ) && ( (DottedPath) obj ).absoluteName.equals(this.absoluteName);
    }

    @Override
    public int hashCode() {
        return this.absoluteName.hashCode();
    }

    /**
     * Number of elements from the head element to this element
     */
    public int size() {
        return null != parent ? parent.size() + 1 : 1;
    }

    private List toList() {
        if ( null == this.parent ) {
        	final List result= new ArrayList();
        	result.add(this);
        	return result;
        }
        ArrayList dottedPaths = new ArrayList(this.parent.toList());
        dottedPaths.add(this);
        return dottedPaths;
    }

    @Override
    public Iterator iterator() {
        return toList().iterator();
    }

    /**
     * Parent element in path
     */
    public DottedPath getParent() {
        return this.parent;
    }

    /**
     * Fully qualified name of this element
     * 
     * @return getParent().getAbsoluteName() + "." + getName();
     */
    public String getAbsoluteName() {
        return this.absoluteName;
    }

    /**
     * Local name of this element
     */
    public String getName() {
        return this.name;
    }

    /**
     * Absolute name of this path using the specified separator.
     * 
     * 
     * @param separator
     *            String to append between each path level
     * @return StringBuilder passed in or created
     */
    public StringBuilder toString(StringBuilder sb, final String separator) {
    	for (int i = 0; i < paths.size(); i ++) {
    		sb.append(paths.get(i));
    		if (i + 1 < paths.size()) {
    			sb.append(separator);
    		}
    	}
    	return sb;
    }

    /**
     * @return absolute name
     */
    @Override
    public String toString() {
        return this.absoluteName;
    }
}