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Base type to represent a generic data expression used in a report design. An expression has an optional return data type. Each expression can also be associated with a handle, which is used by the Data Engine to store the compiled evaluation plan for the expression.
Method Summary | |
int |
getDataType()
Gets the data type of the expression. |
java.lang.Object |
getHandle()
Returns the handle associated with the expression. |
java.lang.String |
getID()
Every expression has its own unique id. |
void |
setHandle(java.lang.Object handle)
Associates the expression with the provided handle. |
void |
setID(java.lang.String exprID)
ID can be automatically generated by expression concrete class or be set externally. |
Method Detail |
public java.lang.String getID()
public void setID(java.lang.String exprID)
exprID
- public int getDataType()
org.eclipse.birt.core.data.DataType
class.
If the result data type of the expression is not known,
return UNKNOWN_TYPE
.
DataType
public java.lang.Object getHandle()
public void setHandle(java.lang.Object handle)
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