jease.cmf.service.Serializer.java Source code

Introduction

Here is the source code for jease.cmf.service.Serializer.java

Source

/*
Copyright (C) 2016 maik.jablonski@jease.org
    
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
    
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package jease.cmf.service;

import java.io.Reader;
import java.io.Writer;
import java.lang.reflect.Field;
import java.util.Set;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import jease.cmf.annotation.NotSerialized;
import jease.cmf.domain.Node;
import jfix.db4o.Blob;
import jfix.db4o.xstream.converter.BlobConverter;
import jfix.db4o.xstream.converter.DelegateArrayConverter;
import jfix.util.Reflections;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.SingleValueConverter;
import com.thoughtworks.xstream.converters.SingleValueConverterWrapper;

@Service
public class Serializer {

    private XStream xstream;
    private Converter nodeConverter;
    private Converter nodeArrayConverter;

    @Autowired
    private Nodes nodes;

    public Serializer() {
        xstream = new XStream();
        xstream.registerConverter(new BlobConverter());
        nodeConverter = new SingleValueConverterWrapper(new NodeConverter());
        nodeArrayConverter = new DelegateArrayConverter(nodeConverter, xstream.getMapper());
    }

    public Set<Field> getFields(Node node) {
        return Reflections.getFields(node.getClass());
    }

    public void omitField(Field field) {
        xstream.omitField(field.getDeclaringClass(), field.getName());
    }

    public void registerConverter(Field field) {
        xstream.registerLocalConverter(field.getDeclaringClass(), field.getName(),
                field.getType().isArray() ? nodeArrayConverter : nodeConverter);
    }

    public boolean isBlob(Field field) {
        return Reflections.isAssignable(Blob.class, field);
    }

    public boolean isNode(Field field) {
        return Reflections.isAssignable(Node.class, field);
    }

    //   public boolean isPersistent(Field field) {
    //      return Reflections.isAssignable(Persistent.class, field);
    //   }
    //
    //   public boolean isPersistentEntity(Field field) {
    //      return Reflections.isAssignable(Persistent.class, field)
    //            && !(Reflections.isAssignable(Persistent.Value.class, field));
    //   }
    //
    //   public boolean isPersistentValue(Field field) {
    //      return Reflections.isAssignable(Persistent.class, field)
    //            && Reflections.isAssignable(Persistent.Value.class, field);
    //   }

    public boolean isNodeDeclaringClass(Field field) {
        return field.getDeclaringClass() == Node.class;
    }

    public boolean isNotSerialized(Field field) {
        return field.getAnnotation(NotSerialized.class) != null;
    }

    public void toXML(Node node, Writer writer) {
        xstream.toXML(node, writer);
    }

    public Node fromXML(Reader reader) {
        return (Node) xstream.fromXML(reader);
    }

    private class NodeConverter implements SingleValueConverter {

        public boolean canConvert(@SuppressWarnings("rawtypes") Class clazz) {
            return Node.class.isAssignableFrom(clazz);
        }

        public String toString(Object obj) {
            return ((Node) obj).getPath();
        }

        public Object fromString(String str) {
            return nodes.getByPath(str);
        }
    }
}