org.eclipse.swt.ole.win32

Class OleAutomation

java.lang.Object

org.eclipse.swt.ole.win32.OleAutomation

public final class OleAutomation
extends java.lang.Object

OleAutomation provides a generic mechanism for accessing functionality that is specific to a particular ActiveX Control or OLE Document.

The OLE Document or ActiveX Control must support the IDispatch interface in order to provide OleAutomation support. The additional functionality provided by the OLE Object is specified in its IDL file. The additional methods can either be to get property values (getProperty), to set property values (setProperty) or to invoke a method (invoke or invokeNoReply). Arguments are passed around in the form of Variant objects.

Here is a sample IDL fragment:

        interface IMyControl : IDispatch
        {
                [propget, id(0)] HRESULT maxFileCount([retval, out] int *c);
                [propput, id(0)] HRESULT maxFileCount([in] int c);
                [id(1)] HRESULT AddFile([in] BSTR fileName);
        };
 

An example of how to interact with this extended functionality is shown below:

        OleAutomation automation = new OleAutomation(myControlSite);

        // Look up the ID of the maxFileCount parameter
        int[] rgdispid = automation.getIDsOfNames(new String[]{"maxFileCount"});
        int maxFileCountID = rgdispid[0];

        // Set the property maxFileCount to 100:
        if (automation.setProperty(maxFileCountID, new Variant(100))) {
                System.out.println("Max File Count was successfully set.");
        }

        // Get the new value of the maxFileCount parameter:
        Variant pVarResult = automation.getProperty(maxFileCountID);
        if (pVarResult != null) {
                System.out.println("Max File Count is "+pVarResult.getInt());
        }

        // Invoke the AddFile method
        // Look up the IDs of the AddFile method and its parameter
        rgdispid = automation.getIDsOfNames(new String[]{"AddFile", "fileName"}); 
        int dispIdMember = rgdispid[0];
        int[] rgdispidNamedArgs = new int[] {rgdispid[1]};

        // Convert arguments to Variant objects
        Variant[] rgvarg = new Variant[1];
        String fileName = "C:\\testfile";
        rgvarg[0] = new Variant(fileName);

        // Call the method
        Variant pVarResult = automation.invoke(dispIdMember, rgvarg, rgdispidNamedArgs);

        // Check the return value
        if (pVarResult == null || pVarResult.getInt() != OLE.S_OK){
                System.out.println("Failed to add file "+fileName);
        }

        automation.dispose();

 

See Also:

OLE and ActiveX snippets, SWT Examples: OLEExample, OleWebBrowser

Structure Diagram

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.String	exceptionDescription
private IDispatch	objIDispatch
private ITypeInfo	objITypeInfo
private IUnknown	objIUnknown

Constructor Summary

Constructors

Constructor and Description
OleAutomation(IDispatch idispatch)
OleAutomation(OleClientSite clientSite) Creates an OleAutomation object for the specified client.
OleAutomation(java.lang.String progId) Creates an OleAutomation object for the specified progID.

Method Summary

Methods

Modifier and Type	Method and Description
void	dispose() Disposes the automation object.
boolean	equals(java.lang.Object object)
(package private) int	getAddress()
(package private) GUID	getClassID(java.lang.String clientName)
java.lang.String	getDocumentation(int dispId) Returns the documentation string for the given member ID.
OleFunctionDescription	getFunctionDescription(int index) Returns the description of a function at the given index.
java.lang.String	getHelpFile(int dispId) Returns the fully qualified name of the Help file for the given member ID.
int[]	getIDsOfNames(java.lang.String[] names) Returns the positive integer values (IDs) that are associated with the specified names by the IDispatch implementor.
java.lang.String	getLastError() Returns a description of the last error encountered.
java.lang.String	getName(int dispId) Returns the name of the given member ID.
java.lang.String[]	getNames(int dispId, int maxSize) Returns the name of a function and parameter names for the specified function ID.
Variant	getProperty(int dispIdMember) Returns the value of the property specified by the dispIdMember.
Variant	getProperty(int dispIdMember, Variant[] rgvarg) Returns the value of the property specified by the dispIdMember.
Variant	getProperty(int dispIdMember, Variant[] rgvarg, int[] rgdispidNamedArgs) Returns the value of the property specified by the dispIdMember.
OlePropertyDescription	getPropertyDescription(int index) Returns the property description of a variable at the given index.
TYPEATTR	getTypeInfoAttributes() Returns the type info of the current object referenced by the automation.
Variant	invoke(int dispIdMember) Invokes a method on the OLE Object; the method has no parameters.
private int	invoke(int dispIdMember, int wFlags, Variant[] rgvarg, int[] rgdispidNamedArgs, Variant pVarResult)
Variant	invoke(int dispIdMember, Variant[] rgvarg) Invokes a method on the OLE Object; the method has no optional parameters.
Variant	invoke(int dispIdMember, Variant[] rgvarg, int[] rgdispidNamedArgs) Invokes a method on the OLE Object; the method has optional parameters.
void	invokeNoReply(int dispIdMember) Invokes a method on the OLE Object; the method has no parameters.
void	invokeNoReply(int dispIdMember, Variant[] rgvarg) Invokes a method on the OLE Object; the method has no optional parameters.
void	invokeNoReply(int dispIdMember, Variant[] rgvarg, int[] rgdispidNamedArgs) Invokes a method on the OLE Object; the method has optional parameters.
private void	manageExcepinfo(int hResult, EXCEPINFO excepInfo)
boolean	setProperty(int dispIdMember, Variant rgvarg) Sets the property specified by the dispIdMember to a new value.
boolean	setProperty(int dispIdMember, Variant[] rgvarg) Sets the property specified by the dispIdMember to a new value.

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

objIUnknown

private IUnknown objIUnknown

objIDispatch

private IDispatch objIDispatch

exceptionDescription

private java.lang.String exceptionDescription

objITypeInfo

private ITypeInfo objITypeInfo

Constructor Detail

OleAutomation

OleAutomation(IDispatch idispatch)

OleAutomation

public OleAutomation(OleClientSite clientSite)

Creates an OleAutomation object for the specified client.

Parameters:

clientSite - the site for the OLE Document or ActiveX Control whose additional functionality you need to access

Throws:

java.lang.IllegalArgumentException -

• ERROR_INVALID_INTERFACE_ADDRESS when called with an invalid client site

OleAutomation

public OleAutomation(java.lang.String progId)

Creates an OleAutomation object for the specified progID.

Parameters:

progId - the unique program identifier of an OLE Document application; the value of the ProgID key or the value of the VersionIndependentProgID key specified in the registry for the desired OLE Document (for example, the VersionIndependentProgID for Word is Word.Document)

Throws:

SWTException -

• ERROR_INVALID_CLASSID when the progId does not map to a registered CLSID
• ERROR_CANNOT_CREATE_OBJECT when failed to create OLE Object
• ERROR_INTERFACE_NOT_FOUND when the OLE object specified does not implement IDispatch

Since:

3.6

Method Detail

dispose

public void dispose()

Disposes the automation object.

This method releases the IDispatch interface on the OLE Document or ActiveX Control. Do not use the OleAutomation object after it has been disposed.

getAddress

int getAddress()

getClassID

GUID getClassID(java.lang.String clientName)

getHelpFile

public java.lang.String getHelpFile(int dispId)

Returns the fully qualified name of the Help file for the given member ID.

Parameters:

dispId - the member ID whose Help file is being retrieved.

Returns:

a string representing the fully qualified name of a Help file or null.

getDocumentation

public java.lang.String getDocumentation(int dispId)

Returns the documentation string for the given member ID.

Parameters:

dispId - the member ID in which the documentation is being retrieved.

Returns:

the documentation string if it exists; otherwise return null.

getPropertyDescription

public OlePropertyDescription getPropertyDescription(int index)

Returns the property description of a variable at the given index.

Parameters:

index - the index of a variable whose property is being retrieved.

Returns:

an OlePropertyDescription for a variable at the given index.

getFunctionDescription

public OleFunctionDescription getFunctionDescription(int index)

Returns the description of a function at the given index.

Parameters:

index - the index of a function whose property is being retrieved.

Returns:

an OleFunctionDescription for a function at the given index.

getTypeInfoAttributes

public TYPEATTR getTypeInfoAttributes()

Returns the type info of the current object referenced by the automation. The type info contains information about the object such as the function descriptions, the member descriptions and attributes of the type.

Returns:

the type info of the receiver

getName

public java.lang.String getName(int dispId)

Returns the name of the given member ID.

Parameters:

dispId - the member ID in which the name is being retrieved.

Returns:

the name if it exists; otherwise return null.

getNames

public java.lang.String[] getNames(int dispId,
                          int maxSize)

Returns the name of a function and parameter names for the specified function ID.

Parameters:

dispId - the function ID in which the name and parameters are being retrieved.

maxSize - the maximum number of names to retrieve.

Returns:

an array of name containing the function name and the parameter names

getIDsOfNames

public int[] getIDsOfNames(java.lang.String[] names)

Returns the positive integer values (IDs) that are associated with the specified names by the IDispatch implementor. If you are trying to get the names of the parameters in a method, the first String in the names array must be the name of the method followed by the names of the parameters.

Parameters:

names - an array of names for which you require the identifiers

Returns:

positive integer values that are associated with the specified names in the same order as the names where provided; or null if the names are unknown

getLastError

public java.lang.String getLastError()

Returns a description of the last error encountered.

Returns:

a description of the last error encountered

getProperty

public Variant getProperty(int dispIdMember)

Returns the value of the property specified by the dispIdMember.

Parameters:

dispIdMember - the ID of the property as specified by the IDL of the ActiveX Control; the value for the ID can be obtained using OleAutomation.getIDsOfNames

Returns:

the value of the property specified by the dispIdMember or null

getProperty

public Variant getProperty(int dispIdMember,
                  Variant[] rgvarg)

Returns the value of the property specified by the dispIdMember.

Parameters:

dispIdMember - the ID of the property as specified by the IDL of the ActiveX Control; the value for the ID can be obtained using OleAutomation.getIDsOfNames

rgvarg - an array of arguments for the method. All arguments are considered to be read only unless the Variant is a By Reference Variant type.

Returns:

the value of the property specified by the dispIdMember or null

Since:

2.0

getProperty

public Variant getProperty(int dispIdMember,
                  Variant[] rgvarg,
                  int[] rgdispidNamedArgs)

Returns the value of the property specified by the dispIdMember.

Parameters:

dispIdMember - the ID of the property as specified by the IDL of the ActiveX Control; the value for the ID can be obtained using OleAutomation.getIDsOfNames

rgvarg - an array of arguments for the method. All arguments are considered to be read only unless the Variant is a By Reference Variant type.

rgdispidNamedArgs - an array of identifiers for the arguments specified in rgvarg; the parameter IDs must be in the same order as their corresponding values; all arguments must have an identifier - identifiers can be obtained using OleAutomation.getIDsOfNames

Returns:

the value of the property specified by the dispIdMember or null

Since:

2.0

equals

public boolean equals(java.lang.Object object)

Overrides:

equals in class java.lang.Object

invoke

public Variant invoke(int dispIdMember)

Invokes a method on the OLE Object; the method has no parameters.

Parameters:

dispIdMember - the ID of the method as specified by the IDL of the ActiveX Control; the value for the ID can be obtained using OleAutomation.getIDsOfNames

Returns:

the result of the method or null if the method failed to give result information

invoke

public Variant invoke(int dispIdMember,
             Variant[] rgvarg)

Invokes a method on the OLE Object; the method has no optional parameters.

Parameters:

dispIdMember - the ID of the method as specified by the IDL of the ActiveX Control; the value for the ID can be obtained using OleAutomation.getIDsOfNames

rgvarg - an array of arguments for the method. All arguments are considered to be read only unless the Variant is a By Reference Variant type.

Returns:

the result of the method or null if the method failed to give result information

invoke

public Variant invoke(int dispIdMember,
             Variant[] rgvarg,
             int[] rgdispidNamedArgs)

Invokes a method on the OLE Object; the method has optional parameters. It is not necessary to specify all the optional parameters, only include the parameters for which you are providing values.

Parameters:

dispIdMember - the ID of the method as specified by the IDL of the ActiveX Control; the value for the ID can be obtained using OleAutomation.getIDsOfNames

rgvarg - an array of arguments for the method. All arguments are considered to be read only unless the Variant is a By Reference Variant type.

rgdispidNamedArgs - an array of identifiers for the arguments specified in rgvarg; the parameter IDs must be in the same order as their corresponding values; all arguments must have an identifier - identifiers can be obtained using OleAutomation.getIDsOfNames

Returns:

the result of the method or null if the method failed to give result information

invoke

private int invoke(int dispIdMember,
         int wFlags,
         Variant[] rgvarg,
         int[] rgdispidNamedArgs,
         Variant pVarResult)

invokeNoReply

public void invokeNoReply(int dispIdMember)

Invokes a method on the OLE Object; the method has no parameters. In the early days of OLE, the IDispatch interface was not well defined and some applications (mainly Word) did not support a return value. For these applications, call this method instead of calling public void invoke(int dispIdMember).

Parameters:

dispIdMember - the ID of the method as specified by the IDL of the ActiveX Control; the value for the ID can be obtained using OleAutomation.getIDsOfNames

Throws:

SWTException -

• ERROR_ACTION_NOT_PERFORMED when method invocation fails

invokeNoReply

public void invokeNoReply(int dispIdMember,
                 Variant[] rgvarg)

Invokes a method on the OLE Object; the method has no optional parameters. In the early days of OLE, the IDispatch interface was not well defined and some applications (mainly Word) did not support a return value. For these applications, call this method instead of calling public void invoke(int dispIdMember, Variant[] rgvarg).

Parameters:

dispIdMember - the ID of the method as specified by the IDL of the ActiveX Control; the value for the ID can be obtained using OleAutomation.getIDsOfNames

rgvarg - an array of arguments for the method. All arguments are considered to be read only unless the Variant is a By Reference Variant type.

Throws:

SWTException -

• ERROR_ACTION_NOT_PERFORMED when method invocation fails

invokeNoReply

public void invokeNoReply(int dispIdMember,
                 Variant[] rgvarg,
                 int[] rgdispidNamedArgs)

Invokes a method on the OLE Object; the method has optional parameters. It is not necessary to specify all the optional parameters, only include the parameters for which you are providing values. In the early days of OLE, the IDispatch interface was not well defined and some applications (mainly Word) did not support a return value. For these applications, call this method instead of calling public void invoke(int dispIdMember, Variant[] rgvarg, int[] rgdispidNamedArgs).

Parameters:

dispIdMember - the ID of the method as specified by the IDL of the ActiveX Control; the value for the ID can be obtained using OleAutomation.getIDsOfNames

rgvarg - an array of arguments for the method. All arguments are considered to be read only unless the Variant is a By Reference Variant type.

rgdispidNamedArgs - an array of identifiers for the arguments specified in rgvarg; the parameter IDs must be in the same order as their corresponding values; all arguments must have an identifier - identifiers can be obtained using OleAutomation.getIDsOfNames

Throws:

SWTException -

• ERROR_ACTION_NOT_PERFORMED when method invocation fails

manageExcepinfo

private void manageExcepinfo(int hResult,
                   EXCEPINFO excepInfo)

setProperty

public boolean setProperty(int dispIdMember,
                  Variant rgvarg)

Sets the property specified by the dispIdMember to a new value.

Parameters:

dispIdMember - the ID of the property as specified by the IDL of the ActiveX Control; the value for the ID can be obtained using OleAutomation.getIDsOfNames

rgvarg - the new value of the property

Returns:

true if the operation was successful

setProperty

public boolean setProperty(int dispIdMember,
                  Variant[] rgvarg)

Sets the property specified by the dispIdMember to a new value.

Parameters:

dispIdMember - the ID of the property as specified by the IDL of the ActiveX Control; the value for the ID can be obtained using OleAutomation.getIDsOfNames

rgvarg - an array of arguments for the method. All arguments are considered to be read only unless the Variant is a By Reference Variant type.

Returns:

true if the operation was successful

Since:

2.0