Package net.sf.basedb.core.query
Class ParameterExpression
- java.lang.Object
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- net.sf.basedb.core.query.ParameterExpression
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- 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) $
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Constructor Summary
Constructors Constructor Description ParameterExpression(String name, Object defaultValue, Type valueType)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
equals(Object other)
This expression is equal to another ParameterExpression if their names expressions are equal.Collection<? extends QueryElement>
getChildren()
Get the children of this query element or null if it has no children.Object
getDefaultValue()
Get the default value of the parameter.String
getName()
Get the name of the parameter.Type
getValueType()
Get the type of value.int
hashCode()
String
toQl(Query query, DbControl dc)
Create a query language string of the query element.String
toString()
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Method Detail
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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 theQuery.getQueryType()
method to find out which query language is wanted in case the element requires different syntax for different languages.- Specified by:
toQl
in interfaceQueryElement
- Parameters:
query
- The query that is about to be executeddc
- TheDbControl
object used to execute the query- Throws:
BaseException
- If there is any other error
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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 theAddExpression
has two children, the expression beeing added.- Specified by:
getChildren
in interfaceQueryElement
- Returns:
- Always null
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equals
public boolean equals(Object other)
This expression is equal to another ParameterExpression if their names expressions are equal.
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getName
public String getName()
Get the name of the parameter.- Since:
- 2.16
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getDefaultValue
public Object getDefaultValue()
Get the default value of the parameter.- Since:
- 2.16
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getValueType
public Type getValueType()
Get the type of value.- Since:
- 2.16
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