barcode programming in c# Mapping simple data structures in Java

Make ECC200 in Java Mapping simple data structures

The mappedBy() attribute is new here. This attribute sets up the bidirectional relationship and tells the persistence manager that the information for mapping this relationship to our tables is specified in the Computer bean class, specifically to the owner property of Computer.

// Lookup in the Private JNDI ENC via the injected SessionContext Object lookupValue = null; try { lookupValue = context.lookup(envEntryName); log.debug("Obtained environment entry \"" + envEntryName + "\": " + look upValue); } catch (final IllegalArgumentException iae) { // Not found defined within this EJB's Component Environment, // so return null and let the caller handle it log.warn("Could not find environment entry with name: " + envEntryName); return null; } // Cast String returnValue = null; try { returnValue = String.class.cast(lookupValue); } catch (final ClassCastException cce) { throw new IllegalStateException("The specified environment entry, " + lookupValue + ", was not able to be represented as a " + String.class.getName(), cce); } // Return return returnValue;

You need to tell the compiler which kinds of elements this attribute can be used with (the attribute target). We specify this with (what else ) an attribute:

types dclrs line_width two_axes x_label_skip x_labels_vertical zero_axis );

package ejb; import javax.ejb.*; /** * Example bean implementation. * * @ejb.bean * type="Stateless" * name="Example" * jndi-name="ejb/Example" * display-name="Example" */ public class ExampleBean implements SessionBean { /** * @ejb.interface-method * view-type="remote" * @ejb.transaction * type="Required" */ public String trim(String s) { return s.trim(); } /** * @ejb.create-method

In the summary of the previous chapter, table 6.1 outlined the most important iText classes for manipulating documents. You ve used these classes to manipulate the content of existing documents to copy pages, add extra content, fill out forms, and so forth. In this chapter, you ll use PdfStamper and PdfCopy to add interactive features to an existing document. We ll start by adding actions that will help the end user navigate through the document, similar to what you did with internal and external links in section 2.3.1. Next we ll look at bookmarks, but instead of using s and Sections, as you did in section 2.3.2, we ll look at how to create a custom outline tree. Finally, we ll add annotations. For example, you ll learn how to put a sticky note on an existing page, and how to show an advertisement when a PDF document is opened.

In this book, when we talk about EJBs, we are referring to the server-side components that you can use to build parts of your application, such as the business logic or persistence code. Many of us tend to associate the term component with developing complex and heavyweight CORBA, Microsoft COM+ code. In the brave new world of EJB 3, a component is what it ought to be nothing more than a POJO with some special powers. More importantly, these powers remain invisible until they are needed and don t distract from the real purpose of the component. You will see this firsthand throughout this book, especially starting with chapter 2. The real idea behind a component is that it should effectively encapsulate application behavior. The users of a component aren t required to know its inner workings. All they need to know is what to pass in and what to expect back.