rest.ws.gson.deserializer.entity.SearchEntityDeserializer.java Source code

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Here is the source code for rest.ws.gson.deserializer.entity.SearchEntityDeserializer.java

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/*
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package rest.ws.gson.deserializer.entity;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import static rest.ws.dao.DAOFactory.*;
import static rest.ws.gson.GsonUtils.*;
import java.lang.reflect.Type;
import javax.persistence.EntityManager;

/**
 *
 * @author alexander.escalona
 */
public class SearchEntityDeserializer<T> implements JsonDeserializer<T> {
    private final EntityManager entityManager;
    private final EntityMetadata entityMetadata;
    private final Class<T> clazz;

    public SearchEntityDeserializer(Class<T> clazz, EntityManager entityManager, EntityMetadata entityMetadata) {
        this.entityManager = entityManager;
        this.entityMetadata = entityMetadata;
        this.clazz = clazz;
    }

    @Override
    public T deserialize(JsonElement je, Type type, JsonDeserializationContext jdc) throws JsonParseException {
        JsonObject jsonObject = je.getAsJsonObject();
        Object id;
        String property = entityMetadata.getPropertyId();
        Class propertyType = entityMetadata.getPropertyIdType();
        if (jsonObject.has(property)) {
            id = castProperty(jsonObject, property, propertyType);
            if (id == null)
                return null;
            else
                return createEntityDAO(clazz, entityManager).find(id);
        } else {
            throw new JsonParseException(
                    String.format("Bad json configuration, '%s' property is missed", property));
        }
    }

}