/*
* Copyright 2011 the original author or authors.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jayway.jsonpath.internal;
public class JsonFormatter {
private static final String INDENT = " ";
private static final String NEW_LINE = System.getProperty("line.separator");
private static final int MODE_SINGLE = 100;
private static final int MODE_DOUBLE = 101;
private static final int MODE_ESCAPE_SINGLE = 102;
private static final int MODE_ESCAPE_DOUBLE = 103;
private static final int MODE_BETWEEN = 104;
private static void appendIndent(StringBuilder sb, int count) {
for (; count > 0; --count) sb.append(INDENT);
}
public static String prettyPrint(String input) {
input = input.replaceAll("[\\r\\n]", "");
StringBuilder output = new StringBuilder(input.length() * 2);
int mode = MODE_BETWEEN;
int depth = 0;
for (int i = 0; i < input.length(); ++i) {
char ch = input.charAt(i);
switch (mode) {
case MODE_BETWEEN:
switch (ch) {
case '{':
case '[':
output.append(ch);
output.append(NEW_LINE);
appendIndent(output, ++depth);
break;
case '}':
case ']':
output.append(NEW_LINE);
appendIndent(output, --depth);
output.append(ch);
break;
case ',':
output.append(ch);
output.append(NEW_LINE);
appendIndent(output, depth);
break;
case ':':
output.append(" : ");
break;
case '\'':
output.append(ch);
mode = MODE_SINGLE;
break;
case '"':
output.append(ch);
mode = MODE_DOUBLE;
break;
case ' ':
break;
default:
output.append(ch);
break;
}
break;
case MODE_ESCAPE_SINGLE:
output.append(ch);
mode = MODE_SINGLE;
break;
case MODE_ESCAPE_DOUBLE:
output.append(ch);
mode = MODE_DOUBLE;
break;
case MODE_SINGLE:
output.append(ch);
switch (ch) {
case '\'':
mode = MODE_BETWEEN;
break;
case '\\':
mode = MODE_ESCAPE_SINGLE;
break;
}
break;
case MODE_DOUBLE:
output.append(ch);
switch (ch) {
case '"':
mode = MODE_BETWEEN;
break;
case '\\':
mode = MODE_ESCAPE_DOUBLE;
break;
}
break;
}
}
return output.toString();
}
}