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package graphql.util;

import graphql.Internal;

@Internal

public final class EscapeUtil {

private EscapeUtil() {

}

/**

* Encodes the value as a JSON string according to http://json.org/ rules

*

* @param stringValue the value to encode as a JSON string

*

* @return the encoded string

*/

public static String escapeJsonString(String stringValue) {

int len = stringValue.length();

StringBuilder sb = new StringBuilder(len);

for (int i = 0; i < len; i++) {

char ch = stringValue.charAt(i);

switch (ch) {

case '"':

sb.append("\\\"");

break;

case '\\':

sb.append("\\\\");

break;

case '\b':

sb.append("\\b");

break;

case '\f':

sb.append("\\f");

break;

case '\n':

sb.append("\\n");

break;

case '\r':

sb.append("\\r");

break;

case '\t':

sb.append("\\t");

break;

default:

sb.append(ch);

}

}

return sb.toString();

}

}