org.squeryl.adapters.DerbyAdapter.scala Maven / Gradle / Ivy

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A Scala ORM and DSL for talking with Databases using minimum verbosity and maximum type safety

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/*******************************************************************************
 * Copyright 2010 Maxime Lévesque
 *
 * 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.squeryl.adapters

import org.squeryl.Schema
import org.squeryl.internals.{StatementWriter, FieldMetaData, DatabaseAdapter}
import org.squeryl.dsl.ast._
import java.sql.SQLException

class DerbyAdapter extends DatabaseAdapter {

  override def intTypeDeclaration = "integer"
  override def binaryTypeDeclaration = "blob(1M)"

  override def isFullOuterJoinSupported = false

  override def writeColumnDeclaration(fmd: FieldMetaData, isPrimaryKey: Boolean, schema: Schema): String = {

    var res = "  " + quoteIdentifier(fmd.columnName) + " " + databaseTypeFor(fmd)

    for(d <- fmd.defaultValue) {
      val v = convertToJdbcValue(d.value.asInstanceOf[AnyRef])
      if(v.isInstanceOf[String])
        res += " default '" + v + "'"
      else
        res += " default " + v
    }

    if(!fmd.isOption)
      res += " not null"

    if(isPrimaryKey)
      res += " primary key"

    if(supportsAutoIncrementInColumnDeclaration && fmd.isAutoIncremented)
      res += " generated always as identity"

    res
  }

  override def writePaginatedQueryDeclaration(page: () => Option[(Int, Int)], qen: QueryExpressionElements, sw: StatementWriter) = {
    page().foreach(p => {
      sw.write("offset ")
      sw.write(p._1.toString)
      sw.write(" rows fetch next ")
      sw.write(p._2.toString)
      sw.write("rows only")
      sw.pushPendingNextLine
    })
  }
  
  override def isTableDoesNotExistException(e: SQLException) =
    e.getSQLState == "42Y55"

  override def writeRegexExpression(left: ExpressionNode, pattern: String, sw: StatementWriter) =
    throw new UnsupportedOperationException("Derby does not support a regex scalar function")

  override def quoteIdentifier(s: String) = "\"" + s + "\""
}