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@ -25,76 +25,95 @@ public class JsonFormatter {
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private static final String NEW_LINE = System.getProperty("line.separator"); |
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private static final int MODE_SINGLE = 100; |
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private static final int MODE_DOUBLE = 101; |
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private static final int MODE_ESCAPE_SINGLE = 102; |
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private static final int MODE_ESCAPE_DOUBLE = 103; |
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private static final int MODE_BETWEEN = 104; |
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private static void appendIndent(StringBuilder sb, int count) { |
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for (; count > 0; --count) sb.append(INDENT); |
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} |
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private static boolean isEscaped(StringBuilder sb, int index) { |
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boolean escaped = false; |
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int idx = Math.min(index, sb.length()); |
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try { |
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while (idx > 0 && sb.charAt(--idx) == '\\') { |
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escaped = !escaped; |
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} |
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} catch (Exception e){ |
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logger.warn("Failed to check escaped ", e); |
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} |
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return escaped; |
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} |
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public static String prettyPrint(String input) { |
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input = input.replaceAll("[\\r\\n]", ""); |
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StringBuilder output = new StringBuilder(input.length() * 2); |
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boolean quoteOpened = false; |
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int mode = MODE_BETWEEN; |
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int depth = 0; |
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for (int i = 0; i < input.length(); ++i) { |
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char ch = input.charAt(i); |
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switch (ch) { |
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case '{': |
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case '[': |
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output.append(ch); |
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if (!quoteOpened) { |
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output.append(NEW_LINE); |
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appendIndent(output, ++depth); |
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} |
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break; |
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case '}': |
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case ']': |
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if (quoteOpened) |
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output.append(ch); |
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else { |
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output.append(NEW_LINE); |
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appendIndent(output, --depth); |
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output.append(ch); |
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} |
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break; |
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case '"': |
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case '\'': |
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output.append(ch); |
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if (quoteOpened) { |
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if (!isEscaped(output, i)) |
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quoteOpened = false; |
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} else quoteOpened = true; |
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break; |
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case ',': |
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output.append(ch); |
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if (!quoteOpened) { |
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output.append(NEW_LINE); |
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appendIndent(output, depth); |
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} |
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break; |
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case ':': |
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if (quoteOpened) output.append(ch); |
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else output.append(" : "); |
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break; |
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default: |
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if (quoteOpened || !(ch == ' ')) |
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output.append(ch); |
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break; |
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switch (mode) { |
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case MODE_BETWEEN: |
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switch (ch) { |
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case '{': |
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case '[': |
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output.append(ch); |
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output.append(NEW_LINE); |
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appendIndent(output, ++depth); |
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break; |
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case '}': |
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case ']': |
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output.append(NEW_LINE); |
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appendIndent(output, --depth); |
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output.append(ch); |
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break; |
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case ',': |
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output.append(ch); |
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output.append(NEW_LINE); |
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appendIndent(output, depth); |
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break; |
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case ':': |
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output.append(" : "); |
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break; |
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case '\'': |
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output.append(ch); |
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mode = MODE_SINGLE; |
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break; |
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case '"': |
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output.append(ch); |
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mode = MODE_DOUBLE; |
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break; |
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case ' ': |
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break; |
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default: |
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output.append(ch); |
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break; |
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} |
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break; |
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case MODE_ESCAPE_SINGLE: |
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output.append(ch); |
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mode = MODE_SINGLE; |
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break; |
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case MODE_ESCAPE_DOUBLE: |
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output.append(ch); |
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mode = MODE_DOUBLE; |
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break; |
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case MODE_SINGLE: |
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output.append(ch); |
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switch (ch) { |
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case '\'': |
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mode = MODE_BETWEEN; |
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break; |
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case '\\': |
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mode = MODE_ESCAPE_SINGLE; |
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break; |
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} |
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break; |
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case MODE_DOUBLE: |
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output.append(ch); |
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switch (ch) { |
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case '"': |
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mode = MODE_BETWEEN; |
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break; |
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case '\\': |
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mode = MODE_ESCAPE_DOUBLE; |
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break; |
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} |
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break; |
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} |
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} |
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return output.toString(); |
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