src/main/java/org/apache/sling/scripting/sightly/impl/plugin/Plugin.java

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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *
 *   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.sling.scripting.sightly.impl.plugin;

import org.apache.sling.scripting.sightly.compiler.expression.Expression;
import org.apache.sling.scripting.sightly.impl.compiler.frontend.CompilerContext;

/**
 * Common interface for plugins
 */
public interface Plugin extends Comparable<Plugin> {

    /**
     * Given the plugin invocation provide an invoke object which will influence the rendering command
     * stream
     *
     * @param expression      the expression used at plugin invocation
     * @param callInfo        the parameters given to the plugin
     * @param compilerContext a compiler context providing utility methods to plugins
     * @return an invocation
     * @see PluginInvoke
     */
    PluginInvoke invoke(Expression expression, PluginCallInfo callInfo, CompilerContext compilerContext);

    /**
     * The priority of the plugin
     *
     * @return a numeric value which controls when, relative to other plugins, should
     * this plugin be applied
     */
    int priority();

    /**
     * The name of the plugin
     *
     * @return the plugin name
     */
    String name();
}