Package net.sf.basedb.core.query

Class ParameterExpression

java.lang.Object
net.sf.basedb.core.query.ParameterExpression
All Implemented Interfaces:
Expression, QueryElement
public class ParameterExpression
extends Object
implements Expression
Parameter expression. Used to be able to set a value in the query from the query object.
Version:
2.0
Author:
Nicklas
See Also:
Expressions.parameter(String, Object, Type), Query.setParameter(String, Object, Type)
Last modified
$Date: 2012-09-14 09:28:35 +0200 (fr, 14 sep 2012) $

  • Field Details

    • name

      private final String name

    • defaultValue

      private final Object defaultValue

    • valueType

      private final Type valueType

  • Constructor Details

    • ParameterExpression

      public ParameterExpression​(String name, Object defaultValue, Type valueType)

  • Method Details

    • toQl

      public String toQl​(Query query, DbControl dc) throws BaseException
      Description copied from interface: QueryElement
      Create a query language string of the query element. Use the Query.getQueryType() method to find out which query language is wanted in case the element requires different syntax for different languages.
      Specified by:
      toQl in interface QueryElement
      Parameters:
      query - The query that is about to be executed
      dc - The DbControl object used to execute the query
      Throws:
      BaseException - If there is any other error

    • getChildren

      public Collection<? extends QueryElement> getChildren()
      Description copied from interface: QueryElement
      Get the children of this query element or null if it has no children. For example the AddExpression has two children, the expression beeing added.
      Specified by:
      getChildren in interface QueryElement
      Returns:
      Always null

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • equals

      public boolean equals​(Object other)
      This expression is equal to another ParameterExpression if their names expressions are equal.
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • getName

      public String getName()
      Get the name of the parameter.
      Since:
      2.16

    • getDefaultValue

      public Object getDefaultValue()
      Get the default value of the parameter.
      Since:
      2.16

    • getValueType

      public Type getValueType()
      Get the type of value.
      Since:
      2.16