/*
 * Copyright 2014 - 2017 Blazebit.
 *
 * Licensed 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 com.blazebit.persistence.impl.function.datetime.second;

import com.blazebit.persistence.spi.FunctionRenderContext;
import com.blazebit.persistence.spi.JpqlFunction;
import com.blazebit.persistence.spi.TemplateRenderer;

/**
 *
 * @author Christian Beikov
 * @since 1.0
 */
public class SecondFunction implements JpqlFunction {

    private final TemplateRenderer renderer;

    public SecondFunction() {
        this.renderer = new TemplateRenderer("extract(second from ?1)");
    }

    public SecondFunction(String template) {
        this.renderer = new TemplateRenderer(template);
    }

    @Override
    public boolean hasArguments() {
        return true;
    }

    @Override
    public boolean hasParenthesesIfNoArguments() {
        return true;
    }

    @Override
    public Class<?> getReturnType(Class<?> firstArgumentType) {
        return Integer.class;
    }

    @Override
    public void render(FunctionRenderContext context) {
        if (context.getArgumentsSize() != 1) {
            throw new RuntimeException("The second function needs exactly one argument <datetime>! args=" + context);
        }

        renderer.start(context).addArgument(0).build();
    }
}