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package org.srplib.conversion.adapters.guava;

import org.srplib.contract.Argument;
import org.srplib.conversion.Converter;

import com.google.common.base.Function;

/**
 * A adapter for google core libraries known as Guava project (http://code.google.com/p/guava-libraries).
 *
 * FunctionAdapter wraps {@link Converter} to implementation of {@link Function}. FunctionAdapter is a good way to reuse
 * existing converters with rich set of utility methods of Guava project}.
 *
 * 
 *     Converter converter = ....
 *     ...
 *     Collection result = Collections2.transform(collection, new FunctionAdapter(converter));
 * 
 * 
 *
 * @author Anton Pechinsky
 */
public class FunctionAdapter implements Function {

    private Converter converter;

    public FunctionAdapter(Converter converter) {
        Argument.checkNotNull(converter, "Converter should not be null!");
        this.converter = converter;
    }

    @Override
    public O apply(I input) {
        return converter.convert(input);
    }
}