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package org.sfm.map.impl;

import org.sfm.map.*;
import org.sfm.reflect.Instantiator;
import org.sfm.utils.ErrorHelper;

public abstract class AbstractMapper implements Mapper {
	
	private final Instantiator instantiator;

	public AbstractMapper(final Instantiator instantiator) {
		this.instantiator = instantiator;
    }

    @Override
    public final T map(final S source) throws MappingException {
        return map(source, null);
    }

    @Override
	public final T map(final S source, final MappingContext mappingContext) throws MappingException {
		try {
			final T target = instantiator.newInstance(source);
			mapFields(source, target, mappingContext);
			return target;
		} catch(Exception e) {
            return ErrorHelper.rethrow(e);
		}
	}

    @Override
    public final void mapTo(final S source, final T target, final MappingContext mappingContext) throws MappingException {
        try {
            mapToFields(source, target, mappingContext);
        } catch(Exception e) {
            ErrorHelper.rethrow(e);
        }
    }

    protected abstract void mapFields(final S source, final T target, final MappingContext mappingContext) throws Exception;

    protected abstract void mapToFields(final S source, final T target, final MappingContext mappingContext) throws Exception;

    protected void appendToStringBuilder(StringBuilder sb) {
        sb.append("instantiator=").append(String.valueOf(instantiator));
    }


}