IConditionFactory2::CreateLeaf method (structuredquery.h)

Creates a leaf condition node for any value. The returned object supports ICondition and ICondition2.

Syntax

HRESULT CreateLeaf(
  [in]           REFPROPERTYKEY             propkey,
  [in]           CONDITION_OPERATION        cop,
  [in]           REFPROPVARIANT             propvar,
  [in, optional] LPCWSTR                    pszSemanticType,
  [in, optional] LPCWSTR                    pszLocaleName,
  [in, optional] IRichChunk                 *pPropertyNameTerm,
  [in, optional] IRichChunk                 *pOperationTerm,
  [in, optional] IRichChunk                 *pValueTerm,
  [in]           CONDITION_CREATION_OPTIONS cco,
  [in]           REFIID                     riid,
  [out]          void                       **ppv
);

Parameters

[in] propkey

Type: REFPROPERTYKEY

The name of the property of the leaf condition as a REFPROPERTYKEY. If the leaf has no particular property, use PKEY_Null.

[in] cop

Type: CONDITION_OPERATION

A CONDITION_OPERATION enumeration. If the leaf has no particular operation, then use COP_IMPLICIT.

[in] propvar

Type: REFPROPERTYKEY

The property value of the leaf condition as a REFPROPERTYKEY.

[in, optional] pszSemanticType

Type: LPCWSTR

The name of a semantic type of the value, or NULL for a plain string. If the newly created leaf is an unresolved named entity, pszSemanticType should be the name of a semantic type, otherwise NULL.

[in, optional] pszLocaleName

Type: LPCWSTR

The name of the locale to be compared, or NULL for an unspecified locale. If propvar does not contain a string value, then pszLocaleName should be LOCALE_NAME_USER_DEFAULT; otherwise, pszLocaleName should reflect the language the string. Alternatively, pszLocaleName could be LOCALE_NAME_INVARIANT.

[in, optional] pPropertyNameTerm

Type: IRichChunk*

A pointer to an IRichChunk that identifies the range of the input string that represents the property. It can be NULL.

[in, optional] pOperationTerm

Type: IRichChunk*

A pointer to an IRichChunk that identifies the range of the input string that represents the operation. It can be NULL.

[in, optional] pValueTerm

Type: IRichChunk*

A pointer to an IRichChunk that identifies the range of the input string that represents the value. It can be NULL.

[in] cco

Type: CONDITION_CREATION_OPTIONS

The condition creation operation of the leaf condition as the CONDITION_CREATION_OPTIONS enumeration.

[in] riid

Type: REFIID

The desired IID of the enumerating interface: either IEnumUnknown, IEnumVARIANT, or (for a negation condition) IID_ICondition.

[out] ppv

Type: void**

Receives a pointer to zero or more ICondition and ICondition2 objects.

Return value

This method does not return a value.

Remarks

For default options, use the CONDITION_CREATION_DEFAULT flag.

If the leaf condition was obtained by parsing a string, one or more of the parameters pPropertyNameTerm, pOperationTerm and pValueTerm may be represented by an IRichChunk interface (obtained through the ICondition::GetInputTerms method). Otherwise all three parameters can be NULL.

For more information about leaf node terms (property, value, and operation), see ICondition::GetInputTerms.

A virtual property has one or more metadata items in which the key is "MapsToRelation" and the value is a property name (which is one expansion of the property). For more information about metadata, see MetaData.

Requirements

See also

CONDITION_CREATION_OPTIONS

CONDITION_OPERATION

CONDITION_TYPE

ICondition

ICondition2

IConditionFactory

IConditionFactory2

Reference