Author: Lucas Jellema
In a recent article I discussed screenscraping in a in hindsight fairly clumsy way (https://technology.amis.nl/blog/12786/building-java-object-graph-with-tour-de-france-results-using-screen-scraping-java-util-parser-and-assorted-facilities). While preparing for a series of articles on data visualizations, I had need of …
I am quite sure I have addressed this before. But I could not find it readily and I needed it today. So here it goes: I am loading data …
While preparing for the new SOA for Java Professionals training program at AMIS, I was recently working on a section discussing XQuery and more specifically the ability to use …
The final episode in a series on ADF DVT applied to the Tour de France 2011 results. In this series, I have used many of the ADF DVT Graph …
Another article on analyzing and visualizing the results from the Tour de France 2011 using the ADF DVT components. This article uses the same set of data already discussed …
This article uses the statistics about this year’s Tour de France to visualize the gap between each of the top 5 riders and Cadel Evans – throughout the 21 …
An apparently trivial challenge that still took me bit longer than expected. What is the situation: I have a table with two columns (of interest). One is a column …
In two previous articles, I have explained how it is possible to get hold of the results of the Tour de France 2011 (and previous years) using simple Java …
No matter how complex the enterprise and application architectures become, no matter the number of tiers, services, devices and user interfaces – at the heart of most enterprises will …
In a recent article – https://technology.amis.nl/blog/12786/building-java-object-graph-with-tour-de-france-results-using-screen-scraping-java-util-parser-and-assorted-facilities – I described how I retrieved the statistics for recent Tour de France editions from the official Tour de France website from my …
Last night, the AMIS Mobile Special Interest Group convened. This session had as objective to explore the many different mobile agents and devices that we encounter, the types of …
Last Saturday, the Tour de France 2011 departed. For people like myself, enjoying sports and working on Data Visualizations on the one hand and far fetched uses of SQL …
The UNPIVOT operator was introduced in Oracle Database 11g – see for example: https://technology.amis.nl/blog/2421/the-oracle-11g-unpivot-operator-turning-columns-into-rows. In Oracle, the UNPIVOT operation is the process of turning Columns to Rows. Put simply, …
This article shows how to create a widget in an ADF Faces application that looks like this: This table shows a comparison between records – Departments in this case …
I may have bored you before with stories about Data Visualization. It is one of my favorite topics. We deal in data. And visualization of data can help to …
I am presenting later today on the Oracle Fusion Middleware Forum (Spoorwegmuseum, Utrecht). The topic of today’s presentation is cloud computing – especially Platform as a Service – and …
As a followup to my recent article on how to Produce and XML document based on data in a POJO structure using JAXB (https://technology.amis.nl/blog/12499/creating-an-xml-document-based-on-my-pojo-domain-model-how-will-jaxb-help-me) I will describe in this …
The challenge is a common one. We have got data in a domain model, based on POJOs. And we need to marshall that data into an XML document. Note …
The other day on one of the projects I am involved with, we ran into an unexpected exception, from an innocent looking EL expression: javax.el.PropertyNotFoundException: … value=”Book #{book.title}”: Missing …
I have always had a fascination for the Data Visualization capabilities of all the tools and technologies I have worked with. For example: I worked with Oracle Graphics 2.0, …
In the past few weeks, I have encountered a similar discussion in various organisations. Each organisation uses either SOA Suite (11g) or Oracle Service Bus (11g) at the core …
ADF comes with a rich collection of component that allow us to visualize and analyze data in ways that previously were only available in fancy OLAP and other BI …
Some IT organizations that I visit have a sign somewhere indicating the number of days that have passed without a major issue. Production sites with proper respect for health …
Whilst preparing for the Thursday Thunder session at the last day of the ODTUG Kaleidoscope 2011 conference in Long Beach, where an all star team of moderators and developers …
It is just a little feature addition – this ‘Test WebService’ button in the WSDL Editor in JDeveloper 11g Release 2 that was released last week. But it can …
You may have seen we write on Flashback functionality in the Oracle Database. It’s an area that I like – especially since the introduction of the Flashback Data Archive …
This article demonstrates how, through a bit of JavaScript interacting with the HTML 5 Navigator API, some more JavaScript using the ADF Faces Rich Components API and the ADF …
This very brief article demonstrates how a fairly complex, nested JSON document can be created using a single SQL query. The main features used in the SQL statement are …
Once upon a time, I had something of a reputation for creating Charts in SQL. Bar Charts, Pie Charts, Gantt Charts and several other unlikely chart types, all created …
This article illustrates the use of a custom ELVariableResolver in JavaServer Faces applications. In this example, we extend the basic functionality of JSF EL resolution with the ability to …
The Spring Framework is omnipresent in the world of Java applications. Many developers, teams and organizations make use of Spring for various reasons, such as its persistency support, the …
One of the topics I discussed in today’s Masterclass Advanced Database Development was inter-session communication – or how database sessions can exchange information. One of my favorite vehicles to …
Two small new features caught my eye while scanning the 11gR2 new features list for ADF DVT. One applies to the Carousel, the other to the Hierachy Viewer. They …
After my initial adventures (see https://technology.amis.nl/blog/12198/first-impressions-of-the-thematic-map-component-in-jdeveloper-11gr2) I continue to explore the wonderful world of the Thematic Map component. The previous article demonstrated how data in database tables could be …
My curiosity was piqued by all the tweets from JDeveloper and ADF experts about the hot reloading capabilities of JDeveloper 11gR2. Those capabilities that should allow we to run …
One of the components in JDeveloper/ADF 11gR2 I have really been looking forward to – ever since I saw some very interesting and creativity inspiring demonstrations at Oracle Open …
Early this morning, Oracle released JDeveloper 11g Release 2: This release can be downloaded from http://www.oracle.com/technetwork/developer-tools/jdev/downloads/index.html This list of new features – long and quite impressive – is here: …
De Oracle Database is in zekere zin ook een Applicatie Server. Of in elk geval is de database een zeer krachtige infrastructuur die door allerlei soorten applicaties kan worden …
Aanstaande dinsdag organiseert in het kader van de maandelijkse ‘AMIS Academy Adventure’ een ‘voeten in modder’ en ‘handen aan de ploeg’ evenement, met maar liefst 5 parallel-sessies. In elke …
On April 19th, AMIS organized a BYOL session (bring your own laptop) on Complex Event Processing. This session was a combination of lecture and demo, some discussion and handson …
