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java.lang.Object org.apache.openjpa.jdbc.kernel.exps.AbstractVal org.apache.openjpa.jdbc.kernel.exps.Const org.apache.openjpa.jdbc.kernel.exps.Param
public class Param
A parameter in a filter.
Nested Class Summary | |
---|---|
static class |
Param.ParamExpState
Expression state. |
Nested classes/interfaces inherited from class org.apache.openjpa.jdbc.kernel.exps.Const |
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Const.ConstExpState |
Field Summary |
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Fields inherited from class org.apache.openjpa.jdbc.kernel.exps.AbstractVal |
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FALSE, TRUE |
Fields inherited from interface org.apache.openjpa.jdbc.kernel.exps.Val |
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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 | |
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Param(Object key,
Class type)
Constructor. |
Method Summary | |
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void |
appendTo(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql,
int index)
Append the index th 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 |
getIndex()
|
Object |
getParameterKey()
Returns the key of the parameter. |
Object |
getSQLValue(Select sel,
ExpContext ctx,
ExpState state)
Return the SQL value of this constant. |
Class |
getType()
Return the expected type for this value, or Object if
the type is unknown. |
Object |
getValue(ExpContext ctx,
ExpState state)
Return the value of this constant. |
Object |
getValue(Object[] params)
Return the value for this constant given the specified parameters. |
ExpState |
initialize(Select sel,
ExpContext ctx,
int flags)
Initialize the value. |
int |
length(Select sel,
ExpContext ctx,
ExpState state)
Return the number of SQL elements in this value. |
void |
setImplicitType(Class type)
Set the implicit type of the value, based on how it is used in the filter. |
void |
setIndex(int idx)
Set the index of this parameter. |
Methods inherited from class org.apache.openjpa.jdbc.kernel.exps.Const |
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appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendSize, getMetaData, groupBy, isSQLValueNull, load, orderBy, select, selectColumns, setMetaData |
Methods inherited from class org.apache.openjpa.jdbc.kernel.exps.AbstractVal |
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acceptVisit, appendIndex, appendType, getAlias, getId, 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 |
Methods inherited from interface org.apache.openjpa.kernel.exps.Value |
---|
acceptVisit, getAlias, getMetaData, getName, getPath, getSelectAs, isAggregate, isVariable, isXPath, setAlias, setMetaData |
Constructor Detail |
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public Param(Object key, Class type)
Method Detail |
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public Object getParameterKey()
Parameter
getParameterKey
in interface Parameter
public Class getType()
Value
Object
if
the type is unknown.
getType
in interface Value
public void setImplicitType(Class type)
Value
Object
from Value.getType()
.
setImplicitType
in interface Value
public int getIndex()
public void setIndex(int idx)
Parameter
setIndex
in interface Parameter
public Object getValue(Object[] params)
Constant
getValue
in interface Constant
public Object getValue(ExpContext ctx, ExpState state)
Const
getValue
in class Const
public Object getSQLValue(Select sel, ExpContext ctx, ExpState state)
Const
getSQLValue
in class Const
public ExpState initialize(Select sel, ExpContext ctx, int flags)
Val
initialize
in interface Val
initialize
in class Const
public void calculateValue(Select sel, ExpContext ctx, ExpState state, Val other, ExpState otherState)
Val
length
or any append
methods.
calculateValue
in interface Val
calculateValue
in class Const
other
- the value being compared to, or null if not a comparisonpublic void appendTo(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql, int index)
Val
index
th SQL element to the given buffer.
appendTo
in interface Val
public int length(Select sel, ExpContext ctx, ExpState state)
Val
length
in interface Val
length
in class Const
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