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java.lang.Object net.sf.basedb.core.query.HqlExpression
public class HqlExpression
A class holding an expression or a restriction where a prefix can be used to represent a root alias in a HQL. I.e. $name = 'somename' could be used for all items that have a name property. '$' will be replaced with the right root alias when the restriction is used in a query, $name = 'somename' will be usr.name = 'somename' in a query for the user table.
Field Summary | |
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private String |
expression
The restriction or expression as a string. |
private String |
prefix
Prefix used to indentify where to put the root alias. |
Constructor Summary | |
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HqlExpression(String expression,
String prefix)
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Method Summary | |
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boolean |
equals(Object other)
This expression is equal to another HqlExpression if their child expressions are equal. |
Collection<? extends QueryElement> |
getChildren()
Get the children of this query element or null if it has no children. |
int |
hashCode()
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String |
toQl(Query query,
DbControl dc)
Create a query language string of the query element. |
String |
toString()
Returns the expression field. |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Field Detail |
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private final String expression
private final String prefix
Constructor Detail |
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HqlExpression(String expression, String prefix)
Method Detail |
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public Collection<? extends QueryElement> getChildren()
QueryElement
AddExpression
has two children, the expression
beeing added.
getChildren
in interface QueryElement
public String toQl(Query query, DbControl dc) throws BaseException
QueryElement
Query.getQueryType()
method to find out which query language is wanted
in case the element requires different syntax for different languages.
toQl
in interface QueryElement
query
- The query that is about to be executeddc
- The DbControl
object used to execute the query
BaseException
- If there is any other errorpublic String toString()
toString
in class Object
public boolean equals(Object other)
equals
in class Object
public int hashCode()
hashCode
in class Object
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