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133 lines (119 loc) · 3.98 KB
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package sqlancer.monet;
import java.util.Arrays;
import java.util.List;
import sqlancer.Randomly;
public final class MonetJSONGenerator {
private static final int MAX_JSON_DEPTH = 3;
private static final List<Integer> OPTIONS1 = Arrays.asList(1, 2, 3, 4, 5);
private static final List<Integer> OPTIONS2 = Arrays.asList(1, 2, 3, 4, 5, 6, 7);
private MonetJSONGenerator() {
}
private static void generateObject(Randomly r, StringBuilder sb, int depth) {
List<Integer> nextOptions = depth < MAX_JSON_DEPTH ? OPTIONS2 : OPTIONS1;
int keynum = 0;
int nkeys = (int) r.getIntegerBounded(12);
sb.append("{");
for (int i = 0; i < nkeys; i++) {
if (i++ != 0) {
sb.append(",");
}
sb.append("\"key").append(keynum++).append("\":");
switch (Randomly.fromList(nextOptions)) {
case 1:
sb.append(r.getInteger());
break;
case 2:
sb.append(r.getFiniteDouble());
break;
case 3:
sb.append(Randomly.getBoolean() ? "true" : "false");
break;
case 4:
sb.append("null");
break;
case 5:
sb.append("\"").append(
r.getString(Randomly.StringGenerationStrategy.ALPHANUMERIC, (int) r.getIntegerBounded(32)))
.append("\"");
break;
case 6:
generateObject(r, sb, depth + 1);
break;
case 7:
generateArray(r, sb);
break;
default:
throw new AssertionError();
}
}
sb.append("}");
}
private static void generateArray(Randomly r, StringBuilder sb) {
List<Integer> nextOptions = /* depth < MAX_JSON_DEPTH ? OPTIONS2 : */ OPTIONS1;
int nentries = (int) r.getIntegerBounded(12);
int choice = Randomly.fromList(nextOptions);
sb.append("[");
for (int i = 0; i < nentries; i++) {
if (i++ != 0) {
sb.append(",");
}
switch (choice) {
case 1:
sb.append(r.getInteger());
break;
case 2:
sb.append(r.getFiniteDouble());
break;
case 3:
sb.append(Randomly.getBoolean() ? "true" : "false");
break;
case 4:
sb.append("null");
break;
case 5:
sb.append("\"").append(
r.getString(Randomly.StringGenerationStrategy.ALPHANUMERIC, (int) r.getIntegerBounded(32)))
.append("\"");
break;
/*
* case 6: generateObject(r, sb, depth + 1); break; case 7: generateArray(r, sb, depth + 1); break;
*/
default:
throw new AssertionError();
}
}
sb.append("]");
}
public static String generateRandomJSON(Randomly r) {
StringBuilder sb = new StringBuilder();
int depth = 0;
switch (Randomly.fromList(OPTIONS2)) {
case 1:
sb.append(r.getInteger());
break;
case 2:
sb.append(r.getFiniteDouble());
break;
case 3:
sb.append(Randomly.getBoolean() ? "true" : "false");
break;
case 4:
sb.append("null");
break;
case 5:
sb.append("\"")
.append(r.getString(Randomly.StringGenerationStrategy.ALPHANUMERIC, (int) r.getIntegerBounded(32)))
.append("\"");
break;
case 6:
generateObject(r, sb, depth + 1);
break;
case 7:
generateArray(r, sb);
break;
default:
throw new AssertionError();
}
return sb.toString();
}
}