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JDBC driver to allow clients to use JCR-SQL2 to query a local or remote ModeShape JCR repository.
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/*
* ModeShape (http://www.modeshape.org)
*
* 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 org.modeshape.jdbc.rest;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.codehaus.jettison.json.JSONArray;
import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;
/**
* Helper class used by the client to parse {@link org.codehaus.jettison.json.JSONObject}
*
* @author Horia Chiorean ([email protected])
*/
public final class JSONHelper {
private JSONHelper() {
}
protected static List valuesFrom( JSONObject json,
String name ) {
if (!json.has(name)) {
// Just an empty collection ...
return Collections.emptyList();
}
Object prop = null;
try {
prop = json.get(name);
if (prop instanceof JSONArray) {
// There are multiple values ...
JSONArray array = (JSONArray)prop;
int length = array.length();
if (length == 0) {
return Collections.emptyList();
}
List result = new ArrayList<>(length);
for (int i = 0; i < length; i++) {
String value = array.getString(i);
result.add(value);
}
return result;
}
} catch (JSONException e) {
throw new RuntimeException(e);
}
// Just a single value ...
return Collections.singletonList(prop.toString());
}
protected static boolean valueFrom( JSONObject object,
String name,
boolean defaultValue ) {
if (!object.has(name)) {
return defaultValue;
}
try {
return object.getBoolean(name);
} catch (JSONException e) {
throw new RuntimeException(e);
}
}
protected static String valueFrom( JSONObject object,
String name ) {
return valueFrom(object, name, null);
}
protected static String valueFrom( JSONObject object,
String name,
String defaultValue ) {
if (!object.has(name)) {
return defaultValue;
}
try {
return object.getString(name);
} catch (JSONException e) {
throw new RuntimeException(e);
}
}
}