/*
 * Copyright 2016-2018 shardingsphere.io.
 * <p>
 * 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.
 * </p>
 */

package io.shardingsphere.core.executor.sql.execute;

import io.shardingsphere.core.executor.ShardingExecuteEngine;
import io.shardingsphere.core.executor.ShardingExecuteGroup;
import io.shardingsphere.core.executor.StatementExecuteUnit;
import io.shardingsphere.core.executor.sql.execute.threadlocal.ExecutorExceptionHandler;
import lombok.RequiredArgsConstructor;

import java.sql.SQLException;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

/**
 * SQL execute template.
 *
 * @author gaohongtao
 * @author zhangliang
 * @author maxiaoguang
 * @author panjuan
 */
@RequiredArgsConstructor
public final class SQLExecuteTemplate {
    
    private final ShardingExecuteEngine executeEngine;
    
    /**
     * Execute.
     *
     * @param statementExecuteUnits SQL execute units
     * @param callback SQL execute callback
     * @param <T> class type of return value
     * @return execute result
     * @throws SQLException SQL exception
     */
    public <T> List<T> execute(final Collection<? extends StatementExecuteUnit> statementExecuteUnits, final SQLExecuteCallback<T> callback) throws SQLException {
        return execute(statementExecuteUnits, null, callback);
    }
    
    /**
     * Execute.
     *
     * @param statementExecuteUnits SQL execute units
     * @param firstExecuteCallback first SQL execute callback
     * @param callback SQL execute callback
     * @param <T> class type of return value
     * @return execute result
     * @throws SQLException SQL exception
     */
    @SuppressWarnings("unchecked")
    public <T> List<T> execute(
            final Collection<? extends StatementExecuteUnit> statementExecuteUnits, final SQLExecuteCallback<T> firstExecuteCallback, final SQLExecuteCallback<T> callback) throws SQLException {
        try {
            return executeEngine.execute((Collection) statementExecuteUnits, firstExecuteCallback, callback);
        } catch (final SQLException ex) {
            ExecutorExceptionHandler.handleException(ex);
            return Collections.emptyList();
        }
    }
    
    
    
    /**
     * Execute group.
     *
     * @param sqlExecuteGroups SQL execute groups
     * @param callback SQL execute callback
     * @param <T> class type of return value
     * @return execute result
     * @throws SQLException SQL exception
     */
    public <T> List<T> executeGroup(final Collection<ShardingExecuteGroup<? extends StatementExecuteUnit>> sqlExecuteGroups, final SQLExecuteCallback<T> callback) throws SQLException {
        return executeGroup(sqlExecuteGroups, null, callback);
    }
    
    /**
     * Execute group.
     *
     * @param sqlExecuteGroups SQL execute groups
     * @param firstCallback first SQL execute callback
     * @param callback SQL execute callback
     * @param <T> class type of return value
     * @return execute result
     * @throws SQLException SQL exception
     */
    @SuppressWarnings("unchecked")
    public <T> List<T> executeGroup(final Collection<ShardingExecuteGroup<? extends StatementExecuteUnit>> sqlExecuteGroups,
                                    final SQLExecuteCallback<T> firstCallback, final SQLExecuteCallback<T> callback) throws SQLException {
        try {
            return executeEngine.groupExecute((Collection) sqlExecuteGroups, firstCallback, callback);
        } catch (final SQLException ex) {
            ExecutorExceptionHandler.handleException(ex);
            return Collections.emptyList();
        }
    }
}


@@ -1357,1375 +1357,8 @@
 /**%0A
-     * Execute.%0A     *%0A     * @param statementExecuteUnits SQL execute units%0A     * @param callback SQL execute callback%0A     * @param %3CT%3E class type of return value%0A     * @return execute result%0A     * @throws SQLException SQL exception%0A     */%0A    public %3CT%3E List%3CT%3E execute(final Collection%3C? extends StatementExecuteUnit%3E statementExecuteUnits, final SQLExecuteCallback%3CT%3E callback) throws SQLException %7B%0A        return execute(statementExecuteUnits, null, callback);%0A    %7D%0A    %0A    /**%0A     * Execute.%0A     *%0A     * @param statementExecuteUnits SQL execute units%0A     * @param firstExecuteCallback first SQL execute callback%0A     * @param callback SQL execute callback%0A     * @param %3CT%3E class type of return value%0A     * @return execute result%0A     * @throws SQLException SQL exception%0A     */%0A    @SuppressWarnings(%22unchecked%22)%0A    public %3CT%3E List%3CT%3E execute(%0A            final Collection%3C? extends StatementExecuteUnit%3E statementExecuteUnits, final SQLExecuteCallback%3CT%3E firstExecuteCallback, final SQLExecuteCallback%3CT%3E callback) throws SQLException %7B%0A        try %7B%0A            return executeEngine.execute((Collection) statementExecuteUnits, firstExecuteCallback, callback);%0A        %7D catch (final SQLException ex) %7B%0A            ExecutorExceptionHandler.handleException(ex);%0A            return Collections.emptyList();%0A        %7D%0A    %7D%0A    %0A    %0A    %0A    /**%0A
     

delete execute()