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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.internals

trait ColumnAttribute
trait MultipleColumnAttribute

trait AttributeValidOnMultipleColumn extends ColumnAttribute
trait AttributeValidOnNumericalColumn extends ColumnAttribute
trait AttributeValidOnNonNumericalColumn extends ColumnAttribute

case class Unique()
    extends ColumnAttribute
    with MultipleColumnAttribute
    with AttributeValidOnNonNumericalColumn
    with AttributeValidOnNumericalColumn
    with AttributeValidOnMultipleColumn

case class AutoIncremented(var nameOfSequence: Option[String])
    extends ColumnAttribute
    with AttributeValidOnNumericalColumn {

  override def hashCode = this.getClass.hashCode

  override def equals(any: Any) =
    any.isInstanceOf[AutoIncremented]
}

case class Indexed(nameOfIndex: Option[String])
    extends ColumnAttribute
    with MultipleColumnAttribute
    with AttributeValidOnNonNumericalColumn
    with AttributeValidOnNumericalColumn
    with AttributeValidOnMultipleColumn

case class PrimaryKey()
    extends ColumnAttribute
    with AttributeValidOnNonNumericalColumn
    with AttributeValidOnNumericalColumn
    with AttributeValidOnMultipleColumn

case class DBType(declaration: String, explicit: Boolean = false)
    extends ColumnAttribute
    with AttributeValidOnNonNumericalColumn
    with AttributeValidOnNumericalColumn {
  def explicitCast = copy(explicit = true)
}

/**
 * Flag column as not accepting values on INSERT
 */
case class Uninsertable()
    extends ColumnAttribute
    with AttributeValidOnNumericalColumn
    with AttributeValidOnNonNumericalColumn

/**
 * Flag column as not accepting values on UPDATE
 */
case class Unupdatable()
    extends ColumnAttribute
    with AttributeValidOnNumericalColumn
    with AttributeValidOnNonNumericalColumn

case class Named(name: String)
    extends ColumnAttribute
    with AttributeValidOnNumericalColumn
    with AttributeValidOnNonNumericalColumn

case class IsTransient()
    extends ColumnAttribute
    with AttributeValidOnNumericalColumn
    with AttributeValidOnNonNumericalColumn