cloudstack/server/src/com/cloud/api/ApiGsonHelper.java at vmsync · kwanggithub/cloudstack · GitHub

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// 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 com.cloud.api;

import java.lang.reflect.Field;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.lang.reflect.Modifier;

import java.util.ArrayList;

import java.util.Date;

import java.util.List;

import java.util.Map;

import org.apache.log4j.Logger;

import com.google.gson.GsonBuilder;

import org.apache.cloudstack.api.ResponseObject;

import org.apache.cloudstack.utils.GsonUtils;

import com.cloud.serializer.Param;

import com.cloud.utils.DateUtil;

import com.cloud.utils.Pair;

public class ApiGsonHelper {

private static final Logger s_logger = Logger.getLogger(ApiGsonHelper.class);

private static final GsonBuilder s_gBuilder;

static {

s_gBuilder = new GsonBuilder().setDateFormat("yyyy-MM-dd'T'HH:mm:ssZ");

s_gBuilder.setVersion(1.3);

s_gBuilder.registerTypeAdapter(ResponseObject.class, new ResponseObjectTypeAdapter());

s_gBuilder.registerTypeAdapter(Map.class, new GsonUtils.StringMapTypeAdapter());

}

public static GsonBuilder getBuilder() {

return s_gBuilder;

}

public static List<Pair<String, Object>> toPairList(Object o, String name) {

List<Pair<String, Object>> l = new ArrayList<Pair<String, Object>>();

return appendPairList(l, o, name);

}

public static List<Pair<String, Object>> appendPairList(List<Pair<String, Object>> l, Object o, String name) {

if (o != null) {

Class<?> clz = o.getClass();

if (clz.isPrimitive() || clz.getSuperclass() == Number.class || clz == String.class || clz == Date.class) {

l.add(new Pair<String, Object>(name, o.toString()));

return l;

}

for (Field f : clz.getDeclaredFields()) {

if ((f.getModifiers() & Modifier.STATIC) != 0) {

continue;

}

Param param = f.getAnnotation(Param.class);

if (param == null) {

continue;

}

String propName = f.getName();

if (!param.propName().isEmpty()) {

propName = param.propName();

}

String paramName = param.name();

if (paramName.isEmpty()) {

paramName = propName;

}

Method method = getGetMethod(o, propName);

if (method != null) {

try {

Object fieldValue = method.invoke(o);

if (fieldValue != null) {

if (f.getType() == Date.class) {

l.add(new Pair<String, Object>(paramName, DateUtil.getOutputString((Date)fieldValue)));

} else {

l.add(new Pair<String, Object>(paramName, fieldValue.toString()));

}

//else

// l.add(new Pair<String, Object>(paramName, ""));

} catch (IllegalArgumentException e) {

s_logger.error("Illegal argument exception when calling POJO " + o.getClass().getName() + " get method for property: " + propName);

} catch (IllegalAccessException e) {

s_logger.error("Illegal access exception when calling POJO " + o.getClass().getName() + " get method for property: " + propName);

} catch (InvocationTargetException e) {

s_logger.error("Invocation target exception when calling POJO " + o.getClass().getName() + " get method for property: " + propName);

}

return l;

}

private static Method getGetMethod(Object o, String propName) {

Method method = null;

String methodName = getGetMethodName("get", propName);

try {

method = o.getClass().getMethod(methodName);

} catch (SecurityException e1) {

s_logger.error("Security exception in getting POJO " + o.getClass().getName() + " get method for property: " + propName);

} catch (NoSuchMethodException e1) {

if (s_logger.isTraceEnabled()) {

s_logger.trace("POJO " + o.getClass().getName() + " does not have " + methodName + "() method for property: " + propName

+ ", will check is-prefixed method to see if it is boolean property");

}

if (method != null) {

return method;

}

methodName = getGetMethodName("is", propName);

try {

method = o.getClass().getMethod(methodName);

} catch (SecurityException e1) {

s_logger.error("Security exception in getting POJO " + o.getClass().getName() + " get method for property: " + propName);

} catch (NoSuchMethodException e1) {

s_logger.warn("POJO " + o.getClass().getName() + " does not have " + methodName + "() method for property: " + propName);

}

return method;

}

private static String getGetMethodName(String prefix, String fieldName) {

StringBuffer sb = new StringBuffer(prefix);

if (fieldName.length() >= prefix.length() && fieldName.substring(0, prefix.length()).equals(prefix)) {

return fieldName;

} else {

sb.append(fieldName.substring(0, 1).toUpperCase());

sb.append(fieldName.substring(1));

}

return sb.toString();

}

cloudstack/server/src/com/cloud/api/ApiGsonHelper.java at vmsync · kwanggithub/cloudstack · GitHub

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