8.4. Query examples
Although we have yet to discuss the syntax of query filters, we are now in a position to examine some simple queries.
8.4.1. Query without filter
Our first example is a query that lists all instances of the BusinessPartner class. I have presented this as a small application with a main() method which can be run from the command line, although future query examples will be shown as code snippets.
SimpleQuery.Java
package com.ogilviepartners.jdobook.app; import java.util.Collection; import java.util.Iterator; import javax.jdo.*; public class SimpleQuery { public static void main() { JDOBootstrap bootstrap = new JDOBootstrap(); PersistenceManagerFactory pmf = bootstrap.getPersistenceManagerFactory(); PersistenceManager pm = ... |
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