rem Demonstration of using the Java Advanced Imaging API from within PeopleCode ;

rem We'll use this jpeg and write some text on it ;
Local string &sSourceFileName = "E:\pt846\bin\client\winx86\peoplesoft.jpg";
If Not FileExists(&sSourceFileName, %FilePath_Absolute) Then
   Error ("Can't find file " | &sSourceFileName);
End-If;

rem This is the file name for where we'll save the newly created image ;
Local string &sTargetFileName = "c:\temp\new_image.jpeg";

rem The text that we'll actually write onto the image and it's location;
Local string &sTextToWrite = "Grey Sparling Solutions";
Local integer &x = 5;
Local integer &y = 10;
Local integer &iFontSize = 12;

rem A few things that we'll use below because of all of the reflection that we're doing. ;
Local JavaObject &jCls = GetJavaClass("java.lang.Class");
Local JavaObject &jImageIOClass = &jCls.forName("javax.imageio.ImageIO");
Local JavaObject &jIOFileClass = &jCls.forName("java.io.File");
Local JavaObject &jRenderedImageClass = &jCls.forName("java.awt.image.RenderedImage");
Local JavaObject &jStringClass = &jCls.forName("java.lang.String");
Local JavaObject &jInt = GetJavaClass("java.lang.Integer").TYPE;


rem This class has a lot of static helper methods that are useful when working with images ;
Local JavaObject &jImageIO = GetJavaClass("javax.imageio.ImageIO");

rem Use in memory buffering instead of disk based buffering;
&jImageIO.setUseCache( False);

rem This triggers the stupid "more than 1 overload matches" PeopleTools error, so we have to;
rem do it the hard way. ;
rem Local JavaObject &jBufImage = &jImageIO.read(CreateJavaObject("java.io.File", &sSourceFileName));
Local JavaObject &jReadArgTypes = CreateJavaObject("java.lang.Class[]", &jIOFileClass);
Local JavaObject &jReadMethod = &jImageIOClass.getDeclaredMethod("read", &jReadArgTypes);
Local JavaObject &jReadArgs = CreateJavaObject("java.lang.Object[]", CreateJavaObject("java.io.File", &sSourceFileName));
Local JavaObject &jBufImage = &jReadMethod.invoke(&jImageIO, &jReadArgs);
If &jBufImage = Null Then
   Error (&sSourceFileName | " is not a recognized image file type");
End-If;

rem Unfortunately, the PeopleCode engine now believes that &jBufImage is of ;
rem type java.lang.Object, because that's what the invoke method returns.   ;
rem So, we can't invoke any of it's own methods directly from PeopleCode    ;
rem Local JavaObject &jGraphics = &jBufImage.createGraphics();
Local JavaObject &jGraphics = &jBufImage.getClass().getDeclaredMethod("createGraphics", Null).invoke(&jBufImage, Null);

Local JavaObject &jFontClass = GetJavaClass("java.awt.Font");
Local integer &iStyle = &jFontClass.BOLD + &jFontClass.ITALIC;

Local JavaObject &jFont = CreateJavaObject("java.awt.Font", "Dialog", &iStyle, &iFontSize);

rem Continued ripple effect from being forced into the reflection side of the world;
rem &jGraphics.setFont(&jFont);
&jGraphics.getClass().getDeclaredMethod("setFont", CreateJavaObject("java.lang.Class[]", &jFont.getClass())).invoke(&jGraphics, CreateJavaObject("java.lang.Object[]", &jFont));

rem &jGraphics.setColor(GetJavaClass("java.awt.Color").RED);
Local JavaObject &jColor = GetJavaClass("java.awt.Color").RED;
&jGraphics.getClass().getDeclaredMethod("setColor", CreateJavaObject("java.lang.Class[]", &jColor.getClass())).invoke(&jGraphics, CreateJavaObject("java.lang.Object[]", &jColor));

rem &jGraphics.drawString(&sTextToWrite, &x, &y);
Local JavaObject &jDrawStringParms = CreateJavaObject("java.lang.Class[]", &jStringClass, &jInt, &jInt);
&jGraphics.getClass().getDeclaredMethod("drawString", &jDrawStringParms).invoke(&jGraphics, CreateJavaObject("java.lang.Object[]", &sTextToWrite, &x, &y));

rem &jImageIO.write(&jBufImage, "jpeg", CreateJavaObject("java.io.File", &sTargetFileName));
Local JavaObject &jWriteArgTypes = CreateJavaObject("java.lang.Class[]", &jRenderedImageClass, &jStringClass, &jIOFileClass);
Local JavaObject &jWriteMethod = &jImageIOClass.getDeclaredMethod("write", &jWriteArgTypes);
&jWriteMethod.invoke(&jImageIO, CreateJavaObject("java.lang.Object[]", &jBufImage, "jpeg", CreateJavaObject("java.io.File", &sTargetFileName)));