org.apache.openjpa.jdbc.kernel.exps
Class Args

java.lang.Object
  extended by org.apache.openjpa.jdbc.kernel.exps.AbstractVal
      extended by org.apache.openjpa.jdbc.kernel.exps.Args
All Implemented Interfaces:
Serializable, Val, Arguments, Value

public class Args
extends AbstractVal
implements Arguments

A list of arguments to a multi-argument function.

Author:
Abe White
See Also:
Serialized Form

Field Summary
 
Fields inherited from class org.apache.openjpa.jdbc.kernel.exps.AbstractVal
FALSE, TRUE
 
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
 
Constructor Summary
Args(Val... values)
           
Args(Val val1, Val val2)
          Constructor.
 
Method Summary
 void acceptVisit(ExpressionVisitor visitor)
          Accept a visit from a tree visitor.
 void appendIsEmpty(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql)
          Append the SQL testing whether this value is empty to the given buffer.
 void appendIsNotEmpty(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql)
          Append the SQL testing whether this value is not empty to the given buffer.
 void appendIsNotNull(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql)
          Append the SQL testing whether this value is not null to the given buffer.
 void appendIsNull(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql)
          Append the SQL testing whether this value is null to the given buffer.
 void appendSize(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql)
          Append the SQL checking the size of this value.
 void appendTo(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql, int index)
          Append the indexth SQL element to the given buffer.
 void calculateValue(Select sel, ExpContext ctx, ExpState state, Val other, ExpState otherState)
          Calculate and cache the SQL for this value.
 int getId()
           
 ClassMetaData getMetaData()
          Return any associated persistent type.
 Class getType()
          Return the expected type for this value, or Object if the type is unknown.
 Class[] getTypes()
           
 Val[] getVals()
           
 Value[] getValues()
          Return the values that make up the arguments.
 void groupBy(Select sel, ExpContext ctx, ExpState state)
          Group by this value.
 ExpState initialize(Select sel, ExpContext ctx, int flags)
          Initialize the value.
 boolean isVariable()
          Return true if this value is a variable.
 int length(Select sel, ExpContext ctx, ExpState state)
          Return the number of SQL elements in this value.
 Object load(ExpContext ctx, ExpState state, Result res)
          Load the data for this value.
 FilterValue[] newFilterValues(Select sel, ExpContext ctx, ExpState state)
          Return a filter value for each argument.
 void orderBy(Select sel, ExpContext ctx, ExpState state, boolean asc)
          Order by this value.
 void select(Select sel, ExpContext ctx, ExpState state, boolean pks)
          Select the data for this value.
 void selectColumns(Select sel, ExpContext ctx, ExpState state, boolean pks)
          Select just the columns for this value.
 void setImplicitType(Class type)
          Set the implicit type of the value, based on how it is used in the filter.
 void setMetaData(ClassMetaData meta)
          Associate a persistent type with this value.
 
Methods inherited from class org.apache.openjpa.jdbc.kernel.exps.AbstractVal
appendIndex, appendType, getAlias, getName, getPath, getSelectAs, isAggregate, isXPath, setAlias, toDataStoreValue
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.apache.openjpa.kernel.exps.Value
getAlias, getName, getPath, getSelectAs, isAggregate, isXPath, setAlias
 

Constructor Detail

Args

public Args(Val val1,
            Val val2)
Constructor. Supply values being combined.


Args

public Args(Val... values)
Method Detail

newFilterValues

public FilterValue[] newFilterValues(Select sel,
                                     ExpContext ctx,
                                     ExpState state)
Return a filter value for each argument.


getValues

public Value[] getValues()
Description copied from interface: Arguments
Return the values that make up the arguments.

Specified by:
getValues in interface Arguments

getVals

public Val[] getVals()

getMetaData

public ClassMetaData getMetaData()
Description copied from interface: Value
Return any associated persistent type.

Specified by:
getMetaData in interface Value

setMetaData

public void setMetaData(ClassMetaData meta)
Description copied from interface: Value
Associate a persistent type with this value.

Specified by:
setMetaData in interface Value

isVariable

public boolean isVariable()
Description copied from interface: Value
Return true if this value is a variable.

Specified by:
isVariable in interface Value
Overrides:
isVariable in class AbstractVal

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

getTypes

public Class[] getTypes()

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

initialize

public ExpState initialize(Select sel,
                           ExpContext ctx,
                           int flags)
Description copied from interface: Val
Initialize the value. This method should recursively initialize any sub-values.

Specified by:
initialize in interface Val

select

public void select(Select sel,
                   ExpContext ctx,
                   ExpState state,
                   boolean pks)
Description copied from interface: Val
Select the data for this value.

Specified by:
select in interface Val

selectColumns

public void selectColumns(Select sel,
                          ExpContext ctx,
                          ExpState state,
                          boolean pks)
Description copied from interface: Val
Select just the columns for this value.

Specified by:
selectColumns in interface Val

groupBy

public void groupBy(Select sel,
                    ExpContext ctx,
                    ExpState state)
Description copied from interface: Val
Group by this value.

Specified by:
groupBy in interface Val

orderBy

public void orderBy(Select sel,
                    ExpContext ctx,
                    ExpState state,
                    boolean asc)
Description copied from interface: Val
Order by this value.

Specified by:
orderBy in interface Val

load

public Object load(ExpContext ctx,
                   ExpState state,
                   Result res)
Description copied from interface: Val
Load the data for this value.

Specified by:
load in interface Val

calculateValue

public void calculateValue(Select sel,
                           ExpContext ctx,
                           ExpState state,
                           Val other,
                           ExpState otherState)
Description copied from interface: Val
Calculate and cache the SQL for this value. This method is called before length or any append methods.

Specified by:
calculateValue in interface Val
other - the value being compared to, or null if not a comparison

length

public int length(Select sel,
                  ExpContext ctx,
                  ExpState state)
Description copied from interface: Val
Return the number of SQL elements in this value.

Specified by:
length in interface Val

appendTo

public void appendTo(Select sel,
                     ExpContext ctx,
                     ExpState state,
                     SQLBuffer sql,
                     int index)
Description copied from interface: Val
Append the indexth SQL element to the given buffer.

Specified by:
appendTo in interface Val

appendIsEmpty

public void appendIsEmpty(Select sel,
                          ExpContext ctx,
                          ExpState state,
                          SQLBuffer sql)
Description copied from interface: Val
Append the SQL testing whether this value is empty to the given buffer.

Specified by:
appendIsEmpty in interface Val
Overrides:
appendIsEmpty in class AbstractVal

appendIsNotEmpty

public void appendIsNotEmpty(Select sel,
                             ExpContext ctx,
                             ExpState state,
                             SQLBuffer sql)
Description copied from interface: Val
Append the SQL testing whether this value is not empty to the given buffer.

Specified by:
appendIsNotEmpty in interface Val
Overrides:
appendIsNotEmpty in class AbstractVal

appendSize

public void appendSize(Select sel,
                       ExpContext ctx,
                       ExpState state,
                       SQLBuffer sql)
Description copied from interface: Val
Append the SQL checking the size of this value.

Specified by:
appendSize in interface Val
Overrides:
appendSize in class AbstractVal

appendIsNull

public void appendIsNull(Select sel,
                         ExpContext ctx,
                         ExpState state,
                         SQLBuffer sql)
Description copied from interface: Val
Append the SQL testing whether this value is null to the given buffer.

Specified by:
appendIsNull in interface Val
Overrides:
appendIsNull in class AbstractVal

appendIsNotNull

public void appendIsNotNull(Select sel,
                            ExpContext ctx,
                            ExpState state,
                            SQLBuffer sql)
Description copied from interface: Val
Append the SQL testing whether this value is not null to the given buffer.

Specified by:
appendIsNotNull in interface Val
Overrides:
appendIsNotNull in class AbstractVal

acceptVisit

public void acceptVisit(ExpressionVisitor visitor)
Description copied from interface: Value
Accept a visit from a tree visitor.

Specified by:
acceptVisit in interface Value
Overrides:
acceptVisit in class AbstractVal

getId

public int getId()
Specified by:
getId in interface Val
Overrides:
getId in class AbstractVal


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