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• 2.3.0
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• ResultIterable.java

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com.buschmais.xo.api.ResultIterable Maven / Gradle / Ivy

package com.buschmais.xo.api;

/**
 * An {@link Iterable} which allows retrieving a single result.
 *
 * @param 
 *     The type returned by the {@link Iterable}.
 */
public interface ResultIterable extends Iterable {

    /**
     * Return a single result.
     * 

     * A {@link XOException} is thrown if no or more than element is returned by the
     * {@link Iterable}.
     * 
     *
     * @return The single result.
     */
    T getSingleResult();

    /**
     * Return true if a result is available.
     *
     * @return true if a result is available.
     */
    boolean hasResult();

    /**
     * Return an result iterator.
     *
     * @return The result iterator.
     */
    ResultIterator iterator();

}