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java.lang.Objectorg.eclipse.datatools.modelbase.sql.query.helper.ValueExpressionHelper
public class ValueExpressionHelper
This class provides a set of utility methods for dealing with Value Expression objects.
| Constructor Summary | |
|---|---|
ValueExpressionHelper()
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| Method Summary | |
|---|---|
static void |
addExpressionsToList(java.util.List columnList,
QueryValueExpression aValueExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Determines whether a given value expression is already a column expression and if so, adds it to the passed in list. |
static QueryValueExpression |
cloneQueryValueExpression(QueryValueExpression valueExpr)
Returns a copy of the given valueExpr using
EcoreUtil.copy(org.eclipse.emf.ecore.EObject). |
static DataType |
copyDataType(DataType dataType)
Returns a copy of the given datatype using
EcoreUtil.copy(org.eclipse.emf.ecore.EObject). |
static void |
copyDataType(QueryValueExpression aSourceExpr,
QueryValueExpression aTargetExpr)
Attempts to copy the datatype from one given value expression to another using EcoreUtil.copy(org.eclipse.emf.ecore.EObject). |
static java.util.List |
getColumnsFromSearchCondition(QuerySearchCondition aSearchCond)
CHECK IMPLEMENTATION! CODE UNTESTED! Method to obtain the column expressions from a SearchCondition |
static java.util.List |
getColumnsFromValueExpression(QueryValueExpression valueExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Method to obtain the column expressions from a generic ValueExpression Note that only the value expressions listed below can contain columns within them. |
static java.util.List |
getTableNamesFromExpression(QueryValueExpression valueExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Method to obtain the string table name/s from a ValueExpression |
static java.util.List |
getTableRefsFromExpression(QueryValueExpression valueExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Method to obtain the table references from a ValueExpression |
static java.util.List |
getVECaseColumns(ValueExpressionCase aValExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Extracts and returns a list of column reference objects from the given ValueExpressionCase object. |
static java.util.List |
getVECastColumns(ValueExpressionCast aValExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Method to obtain the column expressions from a ValueExpressionCast |
static java.util.List |
getVECombinedColumns(ValueExpressionCombined combined)
CHECK IMPLEMENTATION! CODE UNTESTED! Method to obtain the column expressions from a ValueExpressionCombined |
static java.util.List |
getVEFunctionColumns(ValueExpressionFunction funcExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Method to obtain the column expressions from a ValueExpressionFunction |
static java.util.List |
getVELabeledDurationColumns(ValueExpressionLabeledDuration labeledDurExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Method to obtain the column expressions from a ValueExpressionLabeledDuration |
static DataType |
numericDataTypePromotion(DataType left,
DataType right)
Do the numeric data type promotion |
static Column |
resolveColumnFromValueExpression(ValueExpressionColumn aValExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Determine the Column that corresponds to this column expression if there is one that the given columnExpr is derived from. |
static DataType |
resolveCombinedDataType(DataType aDataType,
DataType anotherDataType)
CHANGE IMPLEMENTATION! CODE INCORRECT! returns the given aDataType, if not null, or
the given anotherDataType. |
static void |
resolveTablesInValueExpression(QueryValueExpression valExpr,
java.util.List tables)
CHECK IMPLEMENTATION! CODE UNTESTED! Substitutes the tables in the given table list into the given Value Expression in place of the one it currently has. |
static void |
resolveValueExpressionCaseDatatype(ValueExpressionCase aValExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Tries to determine and set the datatype of the given Case value expression. |
static void |
resolveValueExpressionColumnDatatype(ValueExpressionColumn aValExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Tries to determine and set the datatype of the given column value expression. |
static void |
resolveValueExpressionCombined(ValueExpressionCombined aValExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Tries to determine and set the datatype of the given "Combined" value expression. |
static void |
resolveValueExpressionConcatDatatype(QueryValueExpression aValExpr,
QueryValueExpression aLeftValExpr,
QueryValueExpression aRightValExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Tries to determine and set the datatype (DataType) of the given "concatenated" value expression. |
static void |
resolveValueExpressionDatatype(QueryValueExpression valExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Tries to determine and set the datatype (DataType) of the given value expression. |
static void |
resolveValueExpressionDatatypeRecursively(QueryValueExpression aValueExpr)
Tries to recursively determine and set the datatype (DataType) of the given value expression. |
static void |
resolveValueExpressionDefaultValueDatatype(ValueExpressionDefaultValue aValExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Tries to determine and set the datatype of the given "default" value expression. |
static void |
resolveValueExpressionFunctionDatatype(ValueExpressionFunction aValExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Tries to determine and set the datatype of the given function value expression. |
static void |
resolveValueExpressionLabeledDurationDatatype(ValueExpressionLabeledDuration aValExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Tries to determine and set the datatype of the given labeled duration value expression. |
static void |
resolveValueExpressionListDatatypes(java.util.List aValExprList)
CHECK IMPLEMENTATION! CODE UNTESTED! Tries to determine and set the datatype (DataType) of each of the ValueExpressions in the given list of value expression objects. |
static void |
resolveValueExpressionNullValueDatatype(ValueExpressionNullValue aValExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Tries to determine and set the datatype of the given "null" value expression. |
static void |
resolveValueExpressionSimpleDatatype(ValueExpressionSimple aValExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Tries to determine and set the datatype of the given simple value expression. |
static void |
resolveValueExpressionVariableDatatype(ValueExpressionVariable aVarExpr)
CHECK IMPLEMENTATION! CODE UNTESTED! Tries to determine and set the datatype of the given variable value expression, using the given list of table references. |
| Methods inherited from class java.lang.Object |
|---|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public ValueExpressionHelper()
| Method Detail |
|---|
public static void addExpressionsToList(java.util.List columnList,
QueryValueExpression aValueExpr)
List - list of columnsaValueExpr - QueryValueExpression whose columns will be added to the listpublic static QueryValueExpression cloneQueryValueExpression(QueryValueExpression valueExpr)
valueExpr using
EcoreUtil.copy(org.eclipse.emf.ecore.EObject).
valueExpr -
valueExprpublic static DataType copyDataType(DataType dataType)
datatype using
EcoreUtil.copy(org.eclipse.emf.ecore.EObject).
dataType -
datatype
public static void copyDataType(QueryValueExpression aSourceExpr,
QueryValueExpression aTargetExpr)
EcoreUtil.copy(org.eclipse.emf.ecore.EObject).
The type is not copied if the source expression does not exist or
its datatype is not set.
aSourceExpr - the value expression whose datatype we want to copyaTargetExpr - the value expression whose datatype we want to setpublic static java.util.List getColumnsFromSearchCondition(QuerySearchCondition aSearchCond)
aSearchCond - QuerySearchCondition whose columns we need to get
public static java.util.List getColumnsFromValueExpression(QueryValueExpression valueExpr)
valueExpr - QueryValueExpression whose columns we need to get
public static java.util.List getTableNamesFromExpression(QueryValueExpression valueExpr)
public static java.util.List getTableRefsFromExpression(QueryValueExpression valueExpr)
public static java.util.List getVECaseColumns(ValueExpressionCase aValExpr)
aValExpr - the CASE expression to process
public static java.util.List getVECastColumns(ValueExpressionCast aValExpr)
public static java.util.List getVECombinedColumns(ValueExpressionCombined combined)
public static java.util.List getVEFunctionColumns(ValueExpressionFunction funcExpr)
public static java.util.List getVELabeledDurationColumns(ValueExpressionLabeledDuration labeledDurExpr)
public static DataType numericDataTypePromotion(DataType left,
DataType right)
left - right -
public static Column resolveColumnFromValueExpression(ValueExpressionColumn aValExpr)
public static DataType resolveCombinedDataType(DataType aDataType,
DataType anotherDataType)
aDataType, if not null, or
the given anotherDataType.
Tries to determine the datatype that can contain values of both given
DataTypes aDataType and
anotherDataType, useful for example for the result columns
of a com.ibm.db.models.sql.query.QueryCombined
aDataType - one DataTypeanotherDataType - another DataType
DataType
public static void resolveTablesInValueExpression(QueryValueExpression valExpr,
java.util.List tables)
valExpr - the QueryValueExpression whose table need to be resolvedtables - List of TableReference tablespublic static void resolveValueExpressionCaseDatatype(ValueExpressionCase aValExpr)
aValExpr - a value expression to resolveaTableRefList - the current list of From clause table referencesaDB - a RDBDatabase object containing datatype informationaDBVersion - an object containing database version informationpublic static void resolveValueExpressionColumnDatatype(ValueExpressionColumn aValExpr)
aValExpr - a value expression to resolvepublic static void resolveValueExpressionCombined(ValueExpressionCombined aValExpr)
aValExpr - a value expression to resolve
public static void resolveValueExpressionConcatDatatype(QueryValueExpression aValExpr,
QueryValueExpression aLeftValExpr,
QueryValueExpression aRightValExpr)
aValueExpr - a value expression to resolveaLeftValueExpr - the LHS value expression involved in the CONCATaRightValueExpr - the RHS value expression involved in the CONCATpublic static void resolveValueExpressionDatatype(QueryValueExpression valExpr)
aValueExpr - a value expression to resolvepublic static void resolveValueExpressionDatatypeRecursively(QueryValueExpression aValueExpr)
aValueExpr - a value expression to resolvepublic static void resolveValueExpressionDefaultValueDatatype(ValueExpressionDefaultValue aValExpr)
aValExpr - a value expression to resolveaTableRefList - the current list of From clause table referencesaDB - a RDBDatabase object containing datatype informationaDBVersion - an object containing database version informationpublic static void resolveValueExpressionFunctionDatatype(ValueExpressionFunction aValExpr)
aValExpr - a value expression to resolveaTableRefList - the current list of From clause table referencesaDB - a RDBDatabase object containing datatype informationaDBVersion - an object containing database version informationpublic static void resolveValueExpressionLabeledDurationDatatype(ValueExpressionLabeledDuration aValExpr)
aValExpr - a value expression to resolveaTableRefList - the current list of From clause table referencesaDB - a RDBDatabase object containing datatype informationaDBVersion - an object containing database version informationpublic static void resolveValueExpressionListDatatypes(java.util.List aValExprList)
aValueExprList - a list of value expressions to resolveaTableRefList - the current list of From clause table referencesaDB - a RDBDatabase object containing datatype informationaDBVersion - an object containing database version informationpublic static void resolveValueExpressionNullValueDatatype(ValueExpressionNullValue aValExpr)
aValExpr - a value expression to resolveaTableRefList - the current list of From clause table referencesaDB - a RDBDatabase object containing datatype informationaDBVersion - an object containing database version informationpublic static void resolveValueExpressionSimpleDatatype(ValueExpressionSimple aValExpr)
aValExpr - a value expression to resolvepublic static void resolveValueExpressionVariableDatatype(ValueExpressionVariable aVarExpr)
aVarExpr - a value expression to resolve
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