This snippet allows us to convert Leptonica PIX data into Java BufferedImage, in my case the pix->data could be compressed using zlib so I am decompressing before recreating image. We are assuming here that this is bi-tonal image(1 bpp) File used in example : Pix data compressed used ZLib Pix data decompressed Image represented by …
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This snippet allows us to convert Leptonica PIX data into Java BufferedImage, in my case the pix->data could be compressed using zlib so I am decompressing before recreating image. We are assuming here that this is bi-tonal image(1 bpp) Sample Usage BufferedImage image = LeptonicaUtil.convert(zlibData, width, height, 1); ImageIO.write(image, "png", new File("C:/temp/test.png")); BufferedImage image = …
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There other day I needed to encrypt certain properties in our XML configuration files. But there were few challanges that needed to be addressed Use existing Java installation !!! How will Master Encryption Key be derives and stored !!! First restriction is very important as it limits us to what algorithmic and key sizes can …
Encrypting application configuration files – Java AES Read More »
While upgrading from Spring 3.0.5 to 3.1.1.RELEASE I started getting following exception. java.lang.ClassNotFoundException: org.springframework.web.context.support.StandardServletEnvironment at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559) at org.springframework.web.servlet.HttpServletBean.<init>(HttpServletBean.java:90) at org.springframework.web.servlet.FrameworkServlet.<init>(FrameworkServlet.java:211) at org.springframework.web.servlet.DispatcherServlet.<init>(DispatcherServlet.java:323) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at java.lang.Class.newInstance0(Class.java:355) at java.lang.Class.newInstance(Class.java:308)java.lang.ClassNotFoundException: org.springframework.web.context.support.StandardServletEnvironment at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559) at org.springframework.web.servlet.HttpServletBean.<init>(HttpServletBean.java:90) at org.springframework.web.servlet.FrameworkServlet.<init>(FrameworkServlet.java:211) at org.springframework.web.servlet.DispatcherServlet.<init>(DispatcherServlet.java:323) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) …
Finally I have released my PhantomSQL project. PhantomSQL is a domain specific language designed for mining content from static and dynamic sources, It closely resembles SQL with features borrowed from other popular dynamic languages. It can be run as a interpreter or ‘server’ mode, it comes with type 4 JDBC driver for ease of integration …
Other day I needed to convert excel spreadsheet column name to column index when having 200+ columns is easier to express as ‘FB’ instead of 157 A = 0 B = 1 AA = 26 AA = 27 FB = 157 This code will work for any number of column names. /** * Convert given …
Convert given excel column name to column Index, ex ‘A=0’, ‘AA=26’ Read More »
The other day I needed to read output stream directly into a string, but JDK does not provides us with a stream directly for that. There have been numerous discussions on why and why not we should have this build into the JDK, but this was a case where I did need it and knew …
StringOutputStream backed by ByteArrayOutputStream Read More »
While starting Nexus I was getting following error, this was on a machine that was running at 1GB of memory. Error occurred during initialization of VM Could not reserve enough space for object heap So the solution was to edit /usr/local/nexus/bin/jws/wrapper.conf and add wrapper.java.additional.4=-Xmx128m parameter this setup java to use only 128mb of memory for …
This is one way of creating a group by like functionality for collections using google guava Multimap and Function. Code is straight forward we simply use the index method of the Multimap to group our data by, in here we use our 2 column to group it by the department. Sample output key = Dev …
Implementing GroupBy using Google guava Multimap and Function Read More »
So here is a problem I was running into, I usually use rich:modalpanel just to display some data to the user, but the other day I needed to collect some input. After happily submitting my page all the submitted values were null, what the hell. After some research here are my conclusions on this problem. …
Rich modalpanel events not populating form values Read More »
