AbstractSimpleFieldWrapper.java

package org.springframework.data.simpledb.core.entity;

import java.io.Serializable;
import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;

import org.springframework.util.Assert;

public abstract class AbstractSimpleFieldWrapper<T, ID extends Serializable> extends AbstractFieldWrapper<T, ID> {

	protected AbstractSimpleFieldWrapper(Field field, EntityWrapper<T, ID> parentWrapper, boolean isNewParent) {
		super(field, parentWrapper, isNewParent);
	}

	@Override
	public final Map<String, String> serialize(String prefix) {
		final Map<String, String> result = new HashMap<String, String>();
		result.put(prefix.isEmpty() ? getFieldName() : prefix + "." + getFieldName(), serializeValue());

		return result;
	}

	public abstract String serializeValue();

	@Override
	public final Object deserialize(final Map<String, String> attributes) {
		Assert.isTrue(attributes.size() == 1);

		String attributeValue = attributes.values().iterator().next();
		Assert.notNull(attributeValue);

		return deserializeValue(attributeValue);
	}

	public abstract Object deserializeValue(final String value);

	@Override
	public final void createInstance() {
		// Only applies to NestedEntities
	}
}