SWT中调用Automation的方式

2008-06-23 17:04:00

在SWT中提供了访问OLE的方式，不过相关的例子都是进程内OLE的例子，比如嵌入浏览器、引用ActiveX控件什么的。由于客户的需求，我们需要在程序中通过进程外Automation服务的方式访问IE浏览器。经过网上搜寻，找到一个朋友写的CComObject类可以访问Automation服务。不过经过使用发现一些错误，因此对其进行了修改，为了方便访问IE，我又封装了一个IEAutomation类，这样就暴露给使用者navigate、quit这样的方法。（作者：www.cownew.com 杨中科）

这里例子完全可以用来操控其他的Automation对象，比如操控Work、Excel、AcrobatReader等。

全部代码如下：

CComObject.java

package test;

import org.eclipse.swt.SWT;

import org.eclipse.swt.internal.ole.win32.COM;

import org.eclipse.swt.internal.ole.win32.DISPPARAMS;

import org.eclipse.swt.internal.ole.win32.EXCEPINFO;

import org.eclipse.swt.internal.ole.win32.GUID;

import org.eclipse.swt.internal.ole.win32.IDispatch;

import org.eclipse.swt.internal.ole.win32.ITypeInfo;

import org.eclipse.swt.internal.ole.win32.IUnknown;

import org.eclipse.swt.internal.win32.OS;

import org.eclipse.swt.ole.win32.OLE;

import org.eclipse.swt.ole.win32.Variant;

/**

* @author hcw

public class CComObject

{

private GUID guid = new GUID();

private IDispatch Autoface = null;

private ITypeInfo TypeInfo = null;

private void CreateComObject()

{

dispose();

int[] ppv = new int[1];

int ret = COM.CoCreateInstance(guid, 0, COM.CLSCTX_INPROC_SERVER

| COM.CLSCTX_LOCAL_SERVER, COM.IIDIUnknown, ppv);

if (ret != COM.S_OK)

OLE.error(ret);

// throw new RuntimeException("对象创建失败！");

IUnknown objIUnknown = new IUnknown(ppv[0]);

ppv = new int[1];

ret = objIUnknown.QueryInterface(COM.IIDIDispatch, ppv);

objIUnknown.Release();

if (ret != COM.S_OK)

OLE.error(ret);

// throw new RuntimeException("对象不支持Dispatch！");

Autoface = new IDispatch(ppv[0]);

ppv = new int[1];

ret = Autoface.GetTypeInfo(0, COM.LOCALE_USER_DEFAULT, ppv);

if (ret == OLE.S_OK)

{

TypeInfo = new ITypeInfo(ppv[0]);

TypeInfo.AddRef();

}

private int getIDsOfNames(String name)

{

int[] rgdispid = new int[1];

String[] names = new String[] { name };

int ret = Autoface.GetIDsOfNames(guid, names, names.length,

COM.LOCALE_USER_DEFAULT, rgdispid);

if (ret != COM.S_OK)

return -1;

return rgdispid[0];

}

private void getVariantData(Variant aVar, int pData)

{

if (pData == 0)

OLE.error(OLE.ERROR_OUT_OF_MEMORY);

COM.VariantInit(pData);

if ((aVar.getType() & COM.VT_BYREF) == COM.VT_BYREF)

{

COM.MoveMemory(pData, new short[] { aVar.getType() }, 2);

COM.MoveMemory(pData + 8, new int[] { aVar.getByRef() }, 4);

return;

}

switch (aVar.getType())

{

case COM.VT_EMPTY:

break;

case COM.VT_BOOL:

COM.MoveMemory(pData, new short[] { aVar.getType() }, 2);

COM.MoveMemory(pData + 8,

new int[] { (aVar.getBoolean()) ? COM.VARIANT_TRUE

: COM.VARIANT_FALSE }, 2);

break;

case COM.VT_R4:

COM.MoveMemory(pData, new short[] { aVar.getType() }, 2);

COM.MoveMemory(pData + 8, new float[] { aVar.getFloat() }, 4);

break;

case COM.VT_I4:

COM.MoveMemory(pData, new short[] { aVar.getType() }, 2);

COM.MoveMemory(pData + 8, new int[] { aVar.getInt() }, 4);

break;

case COM.VT_DISPATCH:

aVar.getDispatch().AddRef();

COM.MoveMemory(pData, new short[] { aVar.getType() }, 2);

COM.MoveMemory(pData + 8, new int[] { aVar.getDispatch()

.getAddress() }, 4);

break;

case COM.VT_UNKNOWN:

aVar.getUnknown().AddRef();

COM.MoveMemory(pData, new short[] { aVar.getType() }, 2);

COM.MoveMemory(pData + 8, new int[] { aVar.getUnknown()

.getAddress() }, 4);

break;

case COM.VT_I2:

COM.MoveMemory(pData, new short[] { aVar.getType() }, 2);

COM.MoveMemory(pData + 8, new short[] { aVar.getShort() }, 2);

break;

case COM.VT_BSTR:

COM.MoveMemory(pData, new short[] { aVar.getType() }, 2);

char[] data = (aVar.getString() + "\0").toCharArray();

int ptr = COM.SysAllocString(data);

COM.MoveMemory(pData + 8, new int[] { ptr }, 4);

break;

default:

OLE.error(SWT.ERROR_NOT_IMPLEMENTED);

}

private Variant setVariantData(int pData)

{

if (pData == 0)

OLE.error(OLE.ERROR_INVALID_ARGUMENT);

Variant ret = null;

short[] dataType = new short[1];

COM.MoveMemory(dataType, pData, 2);

int type = dataType[0];

if ((type & COM.VT_BYREF) == COM.VT_BYREF)

{

int[] newByRefPtr = new int[1];

OS.MoveMemory(newByRefPtr, pData + 8, 4);

return new Variant(newByRefPtr[0], COM.VT_BYREF);

}

switch (type)

{

case COM.VT_EMPTY:

break;

case COM.VT_BOOL:

short[] newBooleanData = new short[1];

COM.MoveMemory(newBooleanData, pData + 8, 2);

ret = new Variant(newBooleanData[0] != 0);

break;

case COM.VT_R4:

float[] newFloatData = new float[1];

COM.MoveMemory(newFloatData, pData + 8, 4);

ret = new Variant(newFloatData[0]);

break;

case COM.VT_I4:

int[] newIntData = new int[1];

OS.MoveMemory(newIntData, pData + 8, 4);

ret = new Variant(newIntData[0]);

break;

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SWT中调用Automation的方式