br.com.caelum.vraptor.serialization.gson.Exclusions Maven / Gradle / Ivy

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/***
 * Copyright (c) 2009 Caelum - www.caelum.com.br/opensource All rights reserved.
 *
 * 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 br.com.caelum.vraptor.serialization.gson;

import static br.com.caelum.vraptor.serialization.gson.GsonSerializer.shouldSerializeField;

import java.util.Map.Entry;

import net.vidageek.mirror.dsl.Mirror;
import br.com.caelum.vraptor.serialization.Serializee;

import com.google.gson.ExclusionStrategy;
import com.google.gson.FieldAttributes;

/**
 * 
 * @author Renan Reis
 * @author Guilherme Mangabeira
 */

public class Exclusions implements ExclusionStrategy {

	private Serializee serializee;

	public Exclusions(Serializee serializee) {
		this.serializee = serializee;
	}

	@Override
	public boolean shouldSkipField(FieldAttributes f) {
		String fieldName = f.getName();
		Class definedIn = f.getDeclaringClass();

		for (Entry> include : serializee.getIncludes().entries()) {
			if (isCompatiblePath(include, definedIn, fieldName)) {
				return false;
			}
		}
		for (Entry> exclude : serializee.getExcludes().entries()) {
			if (isCompatiblePath(exclude, definedIn, fieldName)) {
				return true;
			}
		}

		return !serializee.isRecursive() 
				&& !shouldSerializeField(new Mirror().on(definedIn).reflect().field(fieldName).getType());
	}

	private boolean isCompatiblePath(Entry> path, Class definedIn, String fieldName) {
		return (path.getValue().equals(definedIn) && (path.getKey().equals(fieldName) || 
				path.getKey().endsWith("." + fieldName)));
	}

	@Override
	public boolean shouldSkipClass(Class clazz) {
		return false;
	}
}