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package com.paypal.butterfly.extensions.api.operations;

import com.paypal.butterfly.extensions.api.TransformationOperation;

/**
 * Convenience class with {@link ChangeOrRemoveElement} implementation ready for {@link TransformationOperation} subclasses.
 * Protected instance variable {@code ifNotPresent} can be used when deciding the result type,
 * in case the element to be changed or removed is not present.
 *
 * @author facarvalho
 */
public abstract class ChangeOrRemoveElementTO extends TransformationOperation implements ChangeOrRemoveElement {

    @edu.umd.cs.findbugs.annotations.SuppressFBWarnings (value="URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD", justification="This property will be used by sub-classes")
    protected IfNotPresent ifNotPresent = IfNotPresent.Fail;

    @Override
    public T failIfNotPresent() {
        ifNotPresent = IfNotPresent.Fail;
        return (T) this;
    }

    @Override
    public T warnIfNotPresent() {
        ifNotPresent = IfNotPresent.Warn;
        return (T) this;
    }

    @Override
    public T noOpIfNotPresent() {
        ifNotPresent = IfNotPresent.NoOp;
        return (T) this;
    }

}