jadex.transformation.jsonserializer.processors.JsonDateProcessor Maven / Gradle / Ivy

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package jadex.transformation.jsonserializer.processors;

import java.lang.reflect.Type;
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;

import com.eclipsesource.json.JsonObject;
import com.eclipsesource.json.JsonValue;

import jadex.common.SReflect;
import jadex.common.SUtil;
import jadex.common.transformation.IStringConverter;
import jadex.common.transformation.traverser.ITraverseProcessor;
import jadex.common.transformation.traverser.Traverser;
import jadex.common.transformation.traverser.Traverser.MODE;
import jadex.transformation.jsonserializer.JsonTraverser;

/**
 * 
 */ 
public class JsonDateProcessor extends AbstractJsonProcessor
{	
	/**
	 *  Test if the processor is applicable.
	 *  @param object The object.
	 *  @param targetcl	If not null, the traverser should make sure that the result object is compatible with the class loader,
	 *    e.g. by cloning the object using the class loaded from the target class loader.
	 *  @return True, if is applicable. 
	 */
	protected boolean isApplicable(Object object, Type type, ClassLoader targetcl, JsonReadContext context)
	{
		Class clazz = SReflect.getClass(type);
		return object instanceof JsonObject && (SReflect.isSupertype(Date.class, clazz) || SReflect.isSupertype(SimpleDateFormat.class, clazz)) && !SReflect.isSupertype(Timestamp.class, clazz);
	}
	
	/**
	 *  Test if the processor is applicable.
	 *  @param object The object.
	 *  @param targetcl	If not null, the traverser should make sure that the result object is compatible with the class loader,
	 *    e.g. by cloning the object using the class loaded from the target class loader.
	 *  @return True, if is applicable. 
	 */
	protected boolean isApplicable(Object object, Type type, ClassLoader targetcl, JsonWriteContext context)
	{
		Class clazz = SReflect.getClass(type);
		// Timestamp is handled separately
		return (SReflect.isSupertype(Date.class, clazz) || SReflect.isSupertype(SimpleDateFormat.class, clazz)) && !SReflect.isSupertype(Timestamp.class, clazz);
	}
	
	/**
	 *  Process an object.
	 *  @param object The object.
	 * @param targetcl	If not null, the traverser should make sure that the result object is compatible with the class loader,
	 *    e.g. by cloning the object using the class loaded from the target class loader.
	 *  @return The processed object.
	 */
	protected Object readObject(Object object, Type type, Traverser traverser, List conversionprocessors, List processors, IStringConverter converter, MODE mode, ClassLoader targetcl, JsonReadContext context)
	{
		JsonObject obj = (JsonObject)object;
		Class clazz = SReflect.getClass(type);
		Object ret = null;
		
		if (SReflect.isSupertype(Date.class, clazz))
		{
			long time = obj.getLong("value", 0);
			ret = new Date(time);
		}
		else if (SReflect.isSupertype(SimpleDateFormat.class, clazz))
		{
			String pattern = obj.getString("pattern", "");
			ret = new SimpleDateFormat(pattern);
		}
		
		JsonValue idx = (JsonValue)obj.get(JsonTraverser.ID_MARKER);
		if(idx!=null)
			((JsonReadContext)context).addKnownObject(ret, idx.asInt());
		
		return ret;
	}
	
	/**
	 *  Process an object.
	 *  @param object The object.
	 * @param targetcl	If not null, the traverser should make sure that the result object is compatible with the class loader,
	 *    e.g. by cloning the object using the class loaded from the target class loader.
	 *  @return The processed object.
	 */
	protected Object writeObject(Object object, Type type, Traverser traverser, List conversionprocessors, List processors, IStringConverter converter, MODE mode, ClassLoader targetcl, JsonWriteContext wr)
	{
		wr.addObject(wr.getCurrentInputObject());
		
		if (object instanceof Date)
		{
			Date d  = (Date)object;
			
			if(!wr.isWriteClass() && !wr.isWriteId())
			{
				wr.writeString(SUtil.dateToIso8601(d));
			}
			else
			{
				wr.write("{");
				wr.writeNameValue("value", d.getTime());
				if(wr.isWriteClass())
					wr.write(",").writeClass(object.getClass());
				if(wr.isWriteId())
					wr.write(",").writeId();
				wr.write("}");
			}
		}
		else if (object instanceof SimpleDateFormat)
		{
			SimpleDateFormat sdf = (SimpleDateFormat) object;
			
			wr.write("{");
			wr.writeNameString("pattern", sdf.toPattern());
			if(wr.isWriteClass())
				wr.write(",").writeClass(object.getClass());
			if(wr.isWriteId())
				wr.write(",").writeId();
			wr.write("}");
		}
	
		return object;
	}
}