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Classes and utilities to work with OpenL Rules Variations

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package org.openl.rules.variation;

import javax.xml.bind.annotation.XmlRootElement;

import com.rits.cloning.Cloner;

/**
 * Variation that clones all arguments before the modification by another variation(that is delegated.)
 *
 * @author PUdalau, Marat Kamalov
 */

@XmlRootElement
@Deprecated
public class DeepCloningVariation extends Variation {
    /**
     * Suffix for generated variation ID if it have not been specified.
     */
    public static final String DEEP_CLONING_SUFFIX = "[Deep Cloning]";

    private final Cloner cloner = ArgumentsClonerFactory.getCloner();

    private Variation variation;

    /**
     * Empty constructor required for WS data binding
     */
    public DeepCloningVariation() {
    }

    /**
     * Constructs deep-cloning variation with the generated ID(ID of delegated variation +
     * {@link DeepCloningVariation#DEEP_CLONING_SUFFIX}).
     *
     * @param variation Delegated variation.
     */
    public DeepCloningVariation(Variation variation) {
        this(variation.getVariationID() + DEEP_CLONING_SUFFIX, variation);
    }

    /**
     * Constructs deep-cloning variation with the specified ID.
     *
     * @param variationID Unique variation ID.
     * @param variation Delegated variation.
     */
    public DeepCloningVariation(String variationID, Variation variation) {
        super(variationID);
        this.variation = variation;
    }

    @Override
    public Object[] applyModification(Object[] originalArguments) {
        return variation.applyModification(clone(originalArguments));
    }

    @Override
    public Object currentValue(Object[] originalArguments) {
        return variation.currentValue(clone(originalArguments));
    }

    private Object[] clone(Object[] originalArguments) {
        Object[] clonedParams;
        if (originalArguments != null) {
            try {
                clonedParams = cloner.deepClone(originalArguments);
            } catch (Exception ex) {
                throw new VariationRuntimeException("Original arguments deep cloning is failed.", ex);
            }
        } else {
            clonedParams = new Object[0];
        }
        return clonedParams;
    }

    @Override
    public void revertModifications(Object[] modifiedArguments, Object previousValue) {
    }

    /**
     * @return Wrapped variation.
     */
    public Variation getDelegatedVariation() {
        return variation;
    }

    public void setDelegatedVariation(Variation variation) {
        this.variation = variation;
    }

}