NativeScriptFactory.java example

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 * the Apache License, Version 2.0 (the "License"); you may
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 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
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package org.elasticsearch.script;

import org.elasticsearch.common.Nullable;

import java.util.Map;

/**
 * A factory to create instances of either {@link ExecutableScript} or {@link SearchScript}. Note,
 * if this factory creates {@link SearchScript}, it must extend {@link AbstractSearchScript}.
 *
 * @see AbstractExecutableScript
 * @see AbstractSearchScript
 * @see AbstractLongSearchScript
 * @see AbstractDoubleSearchScript
 */
public interface NativeScriptFactory {

    /**
     * Creates a new instance of either a {@link ExecutableScript} or a {@link SearchScript}.
     *
     * @param params The parameters passed to the script. Can be <tt>null</tt>.
     */
    ExecutableScript newScript(@Nullable Map<String, Object> params);

    /**
     * Indicates if document scores may be needed by the produced scripts.
     *
     * @return {@code true} if scores are needed.
     */
    boolean needsScores();

    /**
     * Returns the name of the script factory
     */
    String getName();
}