/*
 * Licensed to Crate under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.  Crate 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.
 *
 * However, if you have executed another commercial license agreement
 * with Crate these terms will supersede the license and you may use the
 * software solely pursuant to the terms of the relevant commercial
 * agreement.
 */

package io.crate.operation.tablefunctions;

import io.crate.metadata.tablefunctions.TableFunctionImplementation;
import org.elasticsearch.common.inject.AbstractModule;
import org.elasticsearch.common.inject.multibindings.MapBinder;

import java.util.HashMap;
import java.util.Map;

public class TableFunctionModule extends AbstractModule {

    private Map<String, TableFunctionImplementation> functions = new HashMap<>();

    @Override
    protected void configure() {
        Unnest.register(this);
        MapBinder<String,TableFunctionImplementation> functionBinder =
                MapBinder.newMapBinder(binder(), String.class, TableFunctionImplementation.class);

        for (Map.Entry<String, TableFunctionImplementation> entry : functions.entrySet()) {
            functionBinder.addBinding(entry.getKey()).toInstance(entry.getValue());
        }
        functions.clear();
        functions = null;
    }

    public void register(String name, TableFunctionImplementation tableFunctionImplementation) {
        functions.put(name, tableFunctionImplementation);
    }
}