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/*
 * File created on Aug 8, 2015
 *
 * Copyright (c) 2015 Carl Harris, Jr
 * and others as noted
 *
 * 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 org.soulwing.jdbc;

import org.soulwing.jdbc.source.SQLSource;

/**
 * Static utility methods for working with {@link SQLSource} objects.
 * @author Carl Harris
 */
class SourceUtils {

  /**
   * Gets a single statement from the given source.
   * @param source the subject source
   * @return SQL statement
   * @throws SQLNullStatementException if the source contains no statements
   */
  public static String getSingleStatement(SQLSource source) {
    try {
      String sql = source.next();
      if (sql == null) {
        throw new SQLNullStatementException();
      }
      return sql;
    }
    finally {
      JdbcUtils.closeQuietly(source);
    }
  }

}