com.github.mauricio.async.db.postgresql.PreparedStatementHolder.scala Maven / Gradle / Ivy

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/*
 * Copyright 2013 Maurício Linhares
 *
 * Maurício Linhares 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 com.github.mauricio.async.db.postgresql

import com.github.mauricio.async.db.postgresql.messages.backend.PostgreSQLColumnData

class PreparedStatementHolder(val query : String, val statementId : Int ) {

  val (realQuery, paramsCount) = {
    val result = new StringBuilder(query.length+16)
    var offset = 0
    var params = 0
    while (offset < query.length) {
      val next = query.indexOf('?', offset)
      if (next == -1) {
        result ++= query.substring(offset)
        offset = query.length
      } else {
        result ++= query.substring(offset, next)
        offset = next + 1
        if (offset < query.length && query(offset) == '?') {
          result += '?'
          offset += 1
        } else {
          result += '$'
          params += 1
          result ++= params.toString
        }
      }
    }
    (result.toString, params)
  }

  var prepared : Boolean = false
  var columnDatas : Array[PostgreSQLColumnData] = Array.empty

}