[1434] | 1 | package org.expeditee.gui.management;
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| 2 |
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| 3 | public class ResourceUtil {
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| 4 |
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| 5 | private static final char PATTERN_START_TWO = '{';
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| 6 | private static final char PATTERN_START_ONE = '$';
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| 7 | private static final char PATTERN_END = '}';
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| 8 | private static final char ESCAPE = '\\';
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| 9 |
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| 10 | public static final String CURRENT_FRAMESET_FLAG = "${CURRENT_FRAMESET}";
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| 11 | public static final String CURRENT_USER = "${CURRENT_USER}";
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| 12 |
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| 13 | /**
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| 14 | * Utility function that transforms a input string to a output string.
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| 15 | * Any occurances of 'pattern' are replaced with 'replacement'.
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| 16 | * \ is used as the escape key.
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| 17 | * @param input The raw input
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| 18 | * @param pattern The pattern to replace.
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| 19 | * This will be prepended by in ${ and appended by } in the input string.
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| 20 | * @param replacement The replacement content to use.
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| 21 | * @return The transformed string.
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| 22 | */
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| 23 | protected static String substitute(String input, String pattern, String replacement) {
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| 24 | StringBuilder outputSB = new StringBuilder();
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| 25 | StringBuilder inputSB = new StringBuilder(input.replace("\\", "\\\\") + ResourceUtil.ESCAPE);
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| 26 | StringBuilder patternSB = new StringBuilder();
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| 27 | boolean inPattern = false;
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| 28 | boolean patternStartPossible = true;
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| 29 |
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| 30 | int index = 0;
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| 31 | int length = inputSB.length() - 1;
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| 32 | while (index < length) {
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| 33 | char c = inputSB.charAt(index);
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| 34 | boolean startingPattern = patternStartPossible &&
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| 35 | c == ResourceUtil.PATTERN_START_TWO &&
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| 36 | outputSB.charAt(outputSB.length() - 1) == ResourceUtil.PATTERN_START_ONE;
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| 37 | boolean endingPattern = c == ResourceUtil.PATTERN_END;
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| 38 |
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| 39 | if (c == ResourceUtil.ESCAPE && !inPattern) {
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| 40 | index++;
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| 41 | c = inputSB.charAt(index);
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| 42 | outputSB.append(c);
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| 43 | if (c == PATTERN_START_ONE) {
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| 44 | patternStartPossible = false;
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| 45 | }
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| 46 | } else if (inPattern && endingPattern) {
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| 47 | String patternFound = patternSB.toString();
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[1439] | 48 | if (("${" + patternFound + "}").equals(pattern)) {
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[1434] | 49 | outputSB.append(replacement);
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| 50 | } else {
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| 51 | outputSB.append("" + ResourceUtil.PATTERN_START_ONE + ResourceUtil.PATTERN_START_TWO);
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| 52 | outputSB.append(patternFound);
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| 53 | outputSB.append(ResourceUtil.PATTERN_END);
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| 54 | }
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| 55 | inPattern = false;
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| 56 | patternSB = new StringBuilder();
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| 57 | } else if (!inPattern && startingPattern) {
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| 58 | outputSB.deleteCharAt(outputSB.length() - 1);
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| 59 | inPattern = true;
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| 60 | } else if (inPattern) {
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| 61 | patternSB.append(c);
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| 62 | } else {
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| 63 | outputSB.append(c);
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| 64 | patternStartPossible = true;
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| 65 | }
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| 66 |
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| 67 | index++;
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| 68 | }
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| 69 |
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| 70 | if (patternSB.length() > 0) {
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| 71 | outputSB.append("${");
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| 72 | }
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| 73 | outputSB.append(patternSB);
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| 74 | return outputSB.toString();
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| 75 | }
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| 76 | }
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