/*
* Copyright 2013 cruxframework.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.cruxframework.crux.core.rebind.bean;
import java.math.BigDecimal;
import java.math.BigInteger;
import org.cruxframework.crux.core.client.bean.JsonEncoder;
import org.cruxframework.crux.core.client.utils.JsUtils;
import org.cruxframework.crux.core.rebind.AbstractInterfaceWrapperProxyCreator;
import org.cruxframework.crux.core.rebind.CruxGeneratorException;
import org.cruxframework.crux.core.rebind.rest.JSonSerializerProxyCreator;
import org.cruxframework.crux.core.utils.JClassUtils;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.core.client.JsonUtils;
import com.google.gwt.core.ext.GeneratorContext;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONParser;
import com.google.gwt.json.client.JSONValue;
/**
* This class creates a client proxy for encode and decode objects to/from json
*
* @author Thiago da Rosa de Bustamante
*
*/
public class JsonEncoderProxyCreator extends AbstractInterfaceWrapperProxyCreator
{
private JClassType targetObjectType;
private JClassType javascriptObjectType;
private String serializerVariable;
private JClassType stringType;
public JsonEncoderProxyCreator(TreeLogger logger, GeneratorContext context, JClassType baseIntf)
{
super(logger, context, baseIntf, true);
JClassType jsonEncoderType = context.getTypeOracle().findType(JsonEncoder.class.getCanonicalName());
targetObjectType = JClassUtils.getActualParameterTypes(baseIntf, jsonEncoderType)[0];
javascriptObjectType = context.getTypeOracle().findType(JavaScriptObject.class.getCanonicalName());
stringType = context.getTypeOracle().findType(String.class.getCanonicalName());
serializerVariable = "serializer";
}
@Override
protected void generateProxyFields(SourcePrinter srcWriter) throws CruxGeneratorException
{
String serializerName = new JSonSerializerProxyCreator(context, logger, targetObjectType).create();;
srcWriter.println("private "+serializerName+" "+serializerVariable+" = new "+serializerName+"();");
}
@Override
protected void generateProxyMethods(SourcePrinter srcWriter)
{
srcWriter.println("public JavaScriptObject toJavaScriptObject(" + targetObjectType.getParameterizedQualifiedSourceName() + " object){");
srcWriter.println("JSONValue result = "+serializerVariable+".encode(object);");
srcWriter.println("if (result == null || result.isNull() != null || result.isObject() == null){");
srcWriter.println("return null;");
srcWriter.println("}");
srcWriter.println("return JsUtils.fromJSONValue(result);");
srcWriter.println("}");
srcWriter.println();
srcWriter.println("public String encode(" + targetObjectType.getParameterizedQualifiedSourceName() + " object){");
srcWriter.println("JSONValue result = "+serializerVariable+".encode(object);");
srcWriter.println("if (result == null || result.isNull() != null){");
srcWriter.println("return null;");
srcWriter.println("}");
if (targetObjectType.isAssignableTo(stringType) || targetObjectType.isEnum() != null ||
targetObjectType.getQualifiedSourceName().equals(BigInteger.class.getCanonicalName()) ||
targetObjectType.getQualifiedSourceName().equals(BigDecimal.class.getCanonicalName()))
{
srcWriter.println("if (result.isString() != null){");
srcWriter.println("return result.isString().stringValue();");
srcWriter.println("}");
}
srcWriter.println("return result.toString();");
srcWriter.println("}");
srcWriter.println();
srcWriter.println("public " + targetObjectType.getParameterizedQualifiedSourceName() + " fromJavaScriptObject(JavaScriptObject object){");
srcWriter.println("JSONValue jsonValue= JsUtils.toJSONValue(object);");
srcWriter.println("return "+serializerVariable+".decode(jsonValue);");
srcWriter.println("}");
srcWriter.println();
srcWriter.println("public " + targetObjectType.getParameterizedQualifiedSourceName() + " decode(String jsonText){");
JClassType objectClassType = targetObjectType.isClassOrInterface();
if (objectClassType != null && objectClassType.isAssignableTo(javascriptObjectType))
{
srcWriter.println(targetObjectType.getParameterizedQualifiedSourceName()+" result = "+JsonUtils.class.getCanonicalName()+".safeEval(jsonText);");
srcWriter.println("return result;");
}
srcWriter.println("JSONValue jsonValue = JSONParser.parseStrict(jsonText);");
srcWriter.println("return "+serializerVariable+".decode(jsonValue);");
srcWriter.println("}");
srcWriter.println();
}
@Override
protected String[] getImports()
{
return new String[]{
JsonUtils.class.getCanonicalName(),
JSONValue.class.getCanonicalName(),
JSONObject.class.getCanonicalName(),
JavaScriptObject.class.getCanonicalName(),
JsUtils.class.getCanonicalName(),
JSONParser.class.getCanonicalName()
};
}
}