package com.googlecode.gwt.test.internal.patchers;
import java.io.IOException;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonParseException;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.JsonToken;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.json.client.JSONArray;
import com.google.gwt.json.client.JSONBoolean;
import com.google.gwt.json.client.JSONNull;
import com.google.gwt.json.client.JSONNumber;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONParser;
import com.google.gwt.json.client.JSONString;
import com.google.gwt.json.client.JSONValue;
import com.googlecode.gwt.test.exceptions.GwtTestException;
import com.googlecode.gwt.test.exceptions.GwtTestJSONException;
import com.googlecode.gwt.test.patchers.PatchClass;
import com.googlecode.gwt.test.patchers.PatchMethod;
@PatchClass(JSONParser.class)
class JSONParserPatcher {
@PatchMethod
static JSONValue evaluate(String json, boolean strict) {
JsonParser jp = null;
try {
JsonFactory f = new JsonFactory();
if (!strict) {
f.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
f.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
f.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
f.configure(JsonParser.Feature.ALLOW_BACKSLASH_ESCAPING_ANY_CHARACTER, true);
f.configure(JsonParser.Feature.ALLOW_UNQUOTED_CONTROL_CHARS, true);
f.configure(JsonParser.Feature.ALLOW_UNQUOTED_CONTROL_CHARS, true);
f.configure(JsonParser.Feature.ALLOW_NUMERIC_LEADING_ZEROS, true);
}
jp = f.createJsonParser(json);
jp.nextToken(); // will return JsonToken.START_OBJECT (verify?)
JSONObject jsonObject = extractJSONObject(json, jp);
return jsonObject;
} catch (Exception e) {
if (e instanceof GwtTestException) {
throw (GwtTestException) e;
}
throw new GwtTestJSONException("Error while parsing JSON string '" + json + "'", e);
} finally {
if (jp != null) {
try {
// ensure resources get cleaned up timely and properly
jp.close();
} catch (IOException e) {
// should never happen
}
}
}
}
@PatchMethod
static JavaScriptObject initTypeMap() {
return null;
}
private static JSONArray extractJSONArray(String json, JsonToken currentToken, JsonParser jp)
throws GwtTestJSONException, IOException {
JSONArray jsonArray = new JSONArray();
int i = 0;
while ((currentToken = jp.nextToken()) != JsonToken.END_ARRAY) {
JSONValue value = extractNextValue(json, currentToken, jp);
jsonArray.set(i++, value);
}
return jsonArray;
}
private static JSONObject extractJSONObject(String json, JsonParser jp) throws IOException,
JsonParseException {
JSONObject jsonObject = new JSONObject();
while (jp.nextToken() != JsonToken.END_OBJECT) {
String fieldName = jp.getCurrentName();
JSONValue value = extractNextValue(json, jp.nextToken(), jp);
jsonObject.put(fieldName, value);
}
return jsonObject;
}
private static JSONValue extractNextValue(String json, JsonToken currentToken, JsonParser jp)
throws GwtTestJSONException, IOException {
JSONValue fieldValue;
switch (currentToken) {
case VALUE_NULL:
fieldValue = JSONNull.getInstance();
break;
case VALUE_STRING:
fieldValue = new JSONString(jp.getText());
break;
case VALUE_NUMBER_INT:
fieldValue = new JSONNumber(jp.getIntValue());
break;
case VALUE_NUMBER_FLOAT:
fieldValue = new JSONNumber(jp.getDoubleValue());
break;
case VALUE_TRUE:
fieldValue = JSONBoolean.getInstance(true);
break;
case VALUE_FALSE:
fieldValue = JSONBoolean.getInstance(false);
break;
case START_ARRAY:
fieldValue = extractJSONArray(json, currentToken, jp);
break;
case START_OBJECT:
fieldValue = extractJSONObject(json, jp);
break;
default:
throw new GwtTestJSONException("Error while parsing JSON string '" + json
+ "' : gwt-test-utils does not handle token '" + jp.getText() + "', line "
+ jp.getTokenLocation().getLineNr() + " column "
+ jp.getTokenLocation().getColumnNr());
}
return fieldValue;
}
}