/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.marmotta.platform.core.util;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;
import javax.ws.rs.Path;
import org.apache.commons.lang3.exception.ExceptionUtils;
import com.fasterxml.jackson.databind.ObjectMapper;
/**
* Utility methods for web services
* <p/>
* Author: Sebastian Schaffert
*/
public class WebServiceUtil {
/**
* Create a JSON representation of an exception, to be returned to the client. The JSON object will be formatted
* as follows:
* <code>
* {
* type: 'JAVA CLASS NAME',
* message: 'EXCEPTION MESSAGE'
* }
* </code>
*/
public static String jsonErrorResponse(Exception e) {
Map<String,Object> result = new HashMap<String, Object>();
result.put("type", e.getClass().getSimpleName());
result.put("message", e.getMessage());
result.put("trace", ExceptionUtils.getStackTrace(e));
ObjectMapper mapper = new ObjectMapper();
try {
return mapper.writeValueAsString(result);
} catch (IOException ex) {
// cannot occur, we write to a string
return null;
}
}
/**
* Create a JSON representation of an exception, to be returned to the client. The JSON object will be formatted
* as follows:
* <code>
* {
* type: 'JAVA CLASS NAME',
* message: 'EXCEPTION MESSAGE'
* }
* </code>
*/
public static void jsonErrorResponse(Exception ex, OutputStream out) throws IOException {
Map<String,Object> result = new HashMap<String, Object>();
result.put("type",ex.getClass().getSimpleName());
result.put("message",ex.getMessage());
ObjectMapper mapper = new ObjectMapper();
mapper.writeValue(out,result);
}
/**
* Get the resource's path
*
* @param resource target resource
* @return path
*/
public static String getResourcePath(Object resource) {
try {
return (String) ReflectionUtils.getAnnotationValue(resource, Path.class, "value");
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
}