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| 1 | +/* |
| 2 | + * Copyright (c) 2016 Patrick Scheibe |
| 3 | + * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 4 | + * of this software and associated documentation files (the "Software"), to deal |
| 5 | + * in the Software without restriction, including without limitation the rights |
| 6 | + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 7 | + * copies of the Software, and to permit persons to whom the Software is |
| 8 | + * furnished to do so, subject to the following conditions: |
| 9 | + * |
| 10 | + * The above copyright notice and this permission notice shall be included in |
| 11 | + * all copies or substantial portions of the Software. |
| 12 | + * |
| 13 | + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 14 | + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 15 | + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 16 | + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 17 | + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 18 | + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 19 | + * THE SOFTWARE. |
| 20 | + */ |
| 21 | + |
| 22 | +package de.halirutan.mathematica.index; |
| 23 | + |
| 24 | +import java.util.List; |
| 25 | +import java.util.regex.Matcher; |
| 26 | +import java.util.regex.Pattern; |
| 27 | + |
| 28 | +/** |
| 29 | + * @author patrick (18.12.16). |
| 30 | + */ |
| 31 | +public class PackageUtil { |
| 32 | + public static final Pattern contextPattern = Pattern.compile("`?(([a-zA-Z$]+[0-9]*)+`)+"); |
| 33 | + public static final Pattern relativeContextPattern = Pattern.compile("`(([a-zA-Z$]+[0-9]*)+`)+"); |
| 34 | + public static final Pattern absoluteContextPattern = Pattern.compile("(([a-zA-Z$]+[0-9]*)+`)+"); |
| 35 | + private PackageUtil(){} |
| 36 | + |
| 37 | + public static String buildContext(List<String> contextStack) { |
| 38 | + StringBuilder context = new StringBuilder("Global`"); |
| 39 | + for (String current : contextStack) { |
| 40 | + final Matcher mRelative = relativeContextPattern.matcher(current); |
| 41 | + final Matcher mAbsolute = absoluteContextPattern.matcher(current); |
| 42 | + if (mRelative.matches()) { |
| 43 | + context.append(current.substring(1)); |
| 44 | + } else if (mAbsolute.matches()) { |
| 45 | + context = new StringBuilder(current); |
| 46 | + } |
| 47 | + } |
| 48 | + return context.toString(); |
| 49 | + } |
| 50 | +} |
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