001/*
002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 * 
016 * Contributors:
017 *     Nuxeo - initial API and implementation
018 *
019 * $Id$
020 */
021
022package org.nuxeo.common.xmap;
023
024import java.util.ArrayList;
025import java.util.List;
026
027/**
028 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
029 */
030public class Path {
031
032    public static final String[] EMPTY_SEGMENTS = new String[0];
033
034    final String path;
035
036    String[] segments;
037
038    String attribute;
039
040    public Path(String path) {
041        this.path = path;
042        parse(path);
043    }
044
045    @Override
046    public String toString() {
047        return path;
048    }
049
050    @Override
051    public boolean equals(Object obj) {
052        if (obj == this) {
053            return true;
054        }
055        if (obj instanceof Path) {
056            return ((Path) obj).path.equals(path);
057        }
058        return false;
059    }
060
061    @Override
062    public int hashCode() {
063        return path.hashCode();
064    }
065
066    private void parse(String path) {
067        List<String> seg = new ArrayList<String>();
068        StringBuilder buf = new StringBuilder();
069        char[] chars = path.toCharArray();
070        boolean attr = false;
071        for (char c : chars) {
072            switch (c) {
073            case '/':
074                seg.add(buf.toString());
075                buf.setLength(0);
076                break;
077            case '@':
078                attr = true;
079                seg.add(buf.toString());
080                buf.setLength(0);
081                break;
082            default:
083                buf.append(c);
084                break;
085            }
086        }
087        if (buf.length() > 0) {
088            if (attr) {
089                attribute = buf.toString();
090            } else {
091                seg.add(buf.toString());
092            }
093        }
094        int size = seg.size();
095        if (size == 1 && seg.get(0).length() == 0) {
096            segments = EMPTY_SEGMENTS;
097        } else {
098            segments = seg.toArray(new String[size]);
099        }
100    }
101
102}