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Optimized stringifyJson a bit.

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This commit is contained in:
FrozenCow 2011-03-04 22:17:50 +01:00
parent d1f280eb0f
commit 41bf56fccb
1 changed files with 31 additions and 33 deletions
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64
src/main/java/org/dynmap/web/Json.java
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@ -8,56 +8,55 @@ import java.util.List;
public class Json {
public static String stringifyJson(Object o) {
StringBuilder sb = new StringBuilder();
appendJson(o, sb);
return sb.toString();
}
public static void appendJson(Object o, StringBuilder s) {
if (o == null) {
return "null";
s.append("null");
} else if (o instanceof Boolean) {
return ((Boolean) o) ? "true" : "false";
s.append(((Boolean) o) ? "true" : "false");
} else if (o instanceof String) {
return "\"" + ((String)o).replace("\"", "\\\"") + "\"";
s.append("\"" + ((String)o).replace("\"", "\\\"") + "\"");
} else if (o instanceof Integer || o instanceof Long || o instanceof Float || o instanceof Double) {
return o.toString();
s.append(o.toString());
} else if (o instanceof LinkedHashMap<?, ?>) {
LinkedHashMap<?, ?> m = (LinkedHashMap<?, ?>) o;
StringBuilder sb = new StringBuilder();
sb.append("{");
s.append("{");
boolean first = true;
for (Object key : m.keySet()) {
if (first)
first = false;
else
sb.append(",");
s.append(",");
sb.append(stringifyJson(key));
sb.append(": ");
sb.append(stringifyJson(m.get(key)));
appendJson(key, s);
s.append(": ");
appendJson(m.get(key), s);
}
sb.append("}");
return sb.toString();
s.append("}");
} else if (o instanceof List<?>) {
List<?> l = (List<?>) o;
StringBuilder sb = new StringBuilder();
sb.append("[");
s.append("[");
int count = 0;
for (int i = 0; i < l.size(); i++) {
if (count++ > 0) sb.append(",");
sb.append(stringifyJson(l.get(i)));
if (count++ > 0) s.append(",");
appendJson(l.get(i), s);
}
sb.append("]");
return sb.toString();
s.append("]");
} else if (o.getClass().isArray()) {
int length = Array.getLength(o);
StringBuilder sb = new StringBuilder();
sb.append("[");
s.append("[");
int count = 0;
for (int i = 0; i < length; i++) {
if (count++ > 0) sb.append(",");
sb.append(stringifyJson(Array.get(o, i)));
if (count++ > 0) s.append(",");
appendJson(Array.get(o, i), s);
}
sb.append("]");
return sb.toString();
s.append("]");
} else if (o instanceof Object) /* TODO: Always true, maybe interface? */ {
StringBuilder sb = new StringBuilder();
sb.append("{");
s.append("{");
boolean first = true;
Class<?> c = o.getClass();
@ -77,15 +76,14 @@ public class Json {
if (first)
first = false;
else
sb.append(",");
sb.append(stringifyJson(fieldName));
sb.append(": ");
sb.append(stringifyJson(fieldValue));
s.append(",");
appendJson(fieldName, s);
s.append(": ");
appendJson(fieldValue, s);
}
sb.append("}");
return sb.toString();
s.append("}");
} else {
return "undefined";
s.append("undefined");
}
}
}