Logback: the reliable, generic, fast and flexible logging framework.
Copyright (C) 1999-2015, QOS.ch. All rights reserved.
This program and the accompanying materials are dual-licensed under
either the terms of the Eclipse Public License v1.0 as published by
the Eclipse Foundation
  or (per the licensee's choosing)
under the terms of the GNU Lesser General Public License version 2.1
as published by the Free Software Foundation.
/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.core.joran.spi;

import java.util.ArrayList;
import java.util.List;

A element path characterizes a traversal path in an XML document.
Author:
Ceki Gulcu
Since:
1.1.0/**
 * A element path characterizes a traversal path in an XML document.
 *
 * @author Ceki Gulcu
 * @since 1.1.0
 */
public class ElementPath {
    // contains String instances
    ArrayList<String> partList = new ArrayList<String>();

    public ElementPath() {
    }

    public ElementPath(List<String> list) {
        partList.addAll(list);
    }

    
Build an elementPath from a string.

Note that "/x" is considered equivalent to "x" and to "x/"
/**
     * Build an elementPath from a string.
     * <p/>
     * Note that "/x" is considered equivalent to "x" and to "x/"
     */
    public ElementPath(String pathStr) {
        if (pathStr == null) {
            return;
        }

        String[] partArray = pathStr.split("/");
        if (partArray == null)
            return;

        for (String part : partArray) {
            if (part.length() > 0) {
                partList.add(part);
            }
        }
    }

    public ElementPath duplicate() {
        ElementPath p = new ElementPath();
        p.partList.addAll(this.partList);
        return p;
    }

    // Joran error skipping relies on the equals method
    @Override
    public boolean equals(Object o) {
        if ((o == null) || !(o instanceof ElementPath)) {
            return false;
        }

        ElementPath r = (ElementPath) o;

        if (r.size() != size()) {
            return false;
        }

        int len = size();

        for (int i = 0; i < len; i++) {
            if (!equalityCheck(get(i), r.get(i))) {
                return false;
            }
        }

        // if everything matches, then the two patterns are equal
        return true;
    }

    private boolean equalityCheck(String x, String y) {
        return x.equalsIgnoreCase(y);
    }

    public List<String> getCopyOfPartList() {
        return new ArrayList<String>(partList);
    }

    public void push(String s) {
        partList.add(s);
    }

    public String get(int i) {
        return (String) partList.get(i);
    }

    public void pop() {
        if (!partList.isEmpty()) {
            partList.remove(partList.size() - 1);
        }
    }

    public String peekLast() {
        if (!partList.isEmpty()) {
            int size = partList.size();
            return (String) partList.get(size - 1);
        } else {
            return null;
        }
    }

    public int size() {
        return partList.size();
    }

    protected String toStableString() {
        StringBuilder result = new StringBuilder();
        for (String current : partList) {
            result.append("[").append(current).append("]");
        }
        return result.toString();
    }

    @Override
    public String toString() {
        return toStableString();
    }
}