PainlessPlugin.java example

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elasticsearch-master
/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.elasticsearch.painless;


import org.elasticsearch.common.settings.Setting;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.plugins.Plugin;
import org.elasticsearch.plugins.ScriptPlugin;
import org.elasticsearch.script.ScriptEngine;

import java.util.Arrays;
import java.util.List;

/**
 * Registers Painless as a plugin.
 */
public final class PainlessPlugin extends Plugin implements ScriptPlugin {

    // force to parse our definition at startup (not on the user's first script)
    static {
        Definition.VOID_TYPE.hashCode();
    }

    @Override
    public ScriptEngine getScriptEngine(Settings settings) {
        return new PainlessScriptEngine(settings);
    }

    @Override
    public List<Setting<?>> getSettings() {
        return Arrays.asList(CompilerSettings.REGEX_ENABLED);
    }
}