org.apache.openjpa.jdbc.kernel.exps
Class StringLength
java.lang.Object
org.apache.openjpa.jdbc.kernel.exps.AbstractVal
org.apache.openjpa.jdbc.kernel.exps.StringFunction
org.apache.openjpa.jdbc.kernel.exps.StringLength
- All Implemented Interfaces:
- Serializable, Val, Value
public class StringLength
- extends StringFunction
Returns the number of characters in a string.
- Author:
- Marc Prud'hommeaux
- See Also:
- Serialized Form
Fields inherited from interface org.apache.openjpa.jdbc.kernel.exps.Val |
ABS_VAL, ARGS_VAL, CMP_EQUAL, COALESCE_VAL, CONCAT_VAL, FORCE_OUTER, GENERALCASE_VAL, INDEXOF_VAL, JOIN_REL, LENGTH_VAL, LOCATE_VAL, LOWER_VAL, MATH_VAL, NULL_CMP, NULLIF_VAL, SIMPLECASE_VAL, SQRT_VAL, SUBSTRING_VAL, TRIM_VAL, UPPER_VAL, VAL, WHENCONDITION_VAL, WHENSCALAR_VAL |
Methods inherited from class org.apache.openjpa.jdbc.kernel.exps.StringFunction |
acceptVisit, calculateValue, getMetaData, getValue, groupBy, initialize, length, load, orderBy, select, selectColumns, setMetaData |
Methods inherited from class org.apache.openjpa.jdbc.kernel.exps.AbstractVal |
appendIndex, appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendSize, appendType, getAlias, getName, getPath, getSelectAs, isAggregate, isVariable, isXPath, setAlias, toDataStoreValue |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
StringLength
public StringLength(Val val)
- Constructor. Provide the string to operate on.
getType
public Class getType()
- Description copied from interface:
Value
- Return the expected type for this value, or
Object
if
the type is unknown.
- Specified by:
getType
in interface Value
- Overrides:
getType
in class StringFunction
setImplicitType
public void setImplicitType(Class type)
- Description copied from interface:
Value
- Set the implicit type of the value, based on how it is used in the
filter. This method is only called on values who return
Object
from Value.getType()
.
- Specified by:
setImplicitType
in interface Value
- Overrides:
setImplicitType
in class StringFunction
appendTo
public void appendTo(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer buf,
int index)
- Description copied from interface:
Val
- Append the
index
th SQL element to the given buffer.
getId
public int getId()
- Specified by:
getId
in interface Val
- Overrides:
getId
in class AbstractVal
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