pl.maciejwalkowiak.plist.FieldSerializer.java Source code

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Here is the source code for pl.maciejwalkowiak.plist.FieldSerializer.java

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/*
 * Copyright (c) 2012 Maciej Walkowiak
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package pl.maciejwalkowiak.plist;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.ReflectionUtils;
import pl.maciejwalkowiak.plist.annotation.PlistAlias;
import pl.maciejwalkowiak.plist.annotation.PlistIgnore;
import pl.maciejwalkowiak.plist.handler.Handler;
import pl.maciejwalkowiak.plist.handler.HandlerNotFoundException;
import pl.maciejwalkowiak.plist.handler.HandlerWrapper;
import pl.maciejwalkowiak.plist.handler.PlistSerializationException;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

/**
 * @author Maciej Walkowiak
 */
public class FieldSerializer {
    private static final Logger logger = LoggerFactory.getLogger(FieldSerializer.class);

    private HandlerWrapper handlerWrapper;

    private PlistSerializerImpl plistSerializer;

    private FieldComparator fieldComparator = new FieldComparator();

    public FieldSerializer(HandlerWrapper handlerWrapper, PlistSerializerImpl plistSerializer) {
        this.handlerWrapper = handlerWrapper;
        this.plistSerializer = plistSerializer;
    }

    public String serializeFields(Object objectToConvert) {
        StringBuilder result = new StringBuilder();
        List<Field> fields = getAllFields(objectToConvert.getClass());

        Collections.sort(fields, fieldComparator);
        for (Field field : fields) {
            result.append(serializeField(objectToConvert, field));
        }

        return XMLHelper.wrap(result).with("dict");
    }

    private String serializeField(Object o, Field field) {
        String result = "";

        int modifiers = field.getModifiers();

        if (!Modifier.isTransient(modifiers) && !Modifier.isStatic(modifiers)) {
            ReflectionUtils.makeAccessible(field);

            if (!field.isAnnotationPresent(PlistIgnore.class)) {
                result = processField(field, o).toString();
            } else {
                logger.debug("field {} is ignored", field.getName());
            }
        }

        return result;
    }

    private StringBuilder processField(Field field, Object object) {
        StringBuilder result = new StringBuilder();

        Object fieldValue = getFieldValue(field, object);

        if (fieldValue != null) {
            result.append(createKey(field));

            try {
                Handler handler = handlerWrapper.getHandlerForObject(fieldValue);

                result.append(handler.handle(fieldValue));
            } catch (HandlerNotFoundException e) {
                result.append(plistSerializer.serialize(fieldValue));
            }
        }

        return result;
    }

    private Object getFieldValue(Field field, Object object) {
        try {
            return field.get(object);
        } catch (IllegalAccessException e) {
            throw new PlistSerializationException("Cannot access field " + field.getName());
        }
    }

    private String createKey(Field field) {
        String keyToWrap;

        if (field.isAnnotationPresent(PlistAlias.class)) {
            PlistAlias alias = field.getAnnotation(PlistAlias.class);

            if (alias.followStrategy()) {
                keyToWrap = plistSerializer.getNamingStrategy().fieldNameToKey(alias.value());
            } else {
                keyToWrap = alias.value();
            }
        } else {
            keyToWrap = plistSerializer.getNamingStrategy().fieldNameToKey(field.getName());
        }

        return XMLHelper.wrap(keyToWrap).with("key");
    }

    private static List<Field> getAllFields(Class<?> type) {
        List<Field> fields = new ArrayList<Field>();
        for (Class<?> c = type; c != null; c = c.getSuperclass()) {
            fields.addAll(Arrays.asList(c.getDeclaredFields()));
        }
        return fields;
    }
}