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1. Identifying the underlying bearer, ESG spec used in the implementation:
import javax.microedition.broadcast.esg;

ServiceGuide esg = ServiceGuide.getDefaultServiceGuide();
MetadataSet spec;
MetadataSet[] speclist = esg.getSupportedMetadataSets();

for (int i = 0; i < speclist.length; i++) {
System.out.println("Metadata Specification: " +
speclist[i].getDescription());
// Check the class for the different types of spec; DVBH in this case.
if (speclist[i] instanceof CommonMetadataSet) {
// ....
}
}


2. Enumerate all the valid attributes in the specs:

ServiceGuide esg = ServiceGuide.getDefaultServiceGuide();
MetadataSet spec;
MetadataSet[] speclist = esg.getSupportedMetadataSets();

for (int i = 0; i < speclist.length; i++) {
Attribute[] attrs = speclist[i].getValidAttributes();
for (int j = 0; j < attrs.length; j++) {
// Eumerate the attributes and print out their long (proper) names.
System.out.println("Attribute: " + attrs[j].getName());
}
}


3. Find all the programs of a particular genre, then display it:

// Form the query
ServiceGuide esg = ServiceGuide.getDefaultServiceGuide();
Query q = QueryComposer.equivalent(CommonMetadataSet.PROGRAM_CONTENT_GENRE, "News");

// Because some programs of our interest may be updated asynchronously,
// we should also add a listener to make sure that we get updated
// on all the programs we are interested in.
// We'll go through this in Example 4.
try {
esg.addListener(new ProgramMonitor(), q);
} catch (QueryException qe) {
// invalid query
}

ProgramEvent programs[];
try {
// Find the programs
programs = esg.findPrograms(q);
for (int i = 0; i < programs.length; i++) {
// A custom function to display the program info
// Example 5.
displayProgramInfo(programs[i]);
}
} catch (QueryException e) {
}


4. Listen to program updates:

// Define my own program change listener for monitoring
// program updates.
class ProgramMonitor implements ServiceGuideListener {

public void serviceGuideUpdated(String event, ServiceGuideData esgdata, Object data) {
if (event == NEW_PROGRAM_LISTED || event == PROGRAM_CHANGED) {
// Display the new program
displayProgramInfo(esgdata);
}
else if (event == SERVICE_GUIDE_BULK_CHANGED || event == PROGRAM_DELETED) {
// We'll need to redo the queries and redisplay
// the programs. See Example 3.
}
}
}


5. Display "Generic" program information:

void displayProgramInfo(ProgramEvent p) {
ServiceGuide esg = ServiceGuide.getDefaultServiceGuide();
// Use the code in example 2 to find all the applicable attributes
// for a program.
MetadataSet[] speclist = esg.getSupportedMetadataSets();
Attribute[] attrs = speclist[0].getValidAttributes();

for (int i = 0; i < attrs.length; i++) {
// Since we do not know ahead of time what the type
// of the attributes are, we will need to test for
// them one by one with "instanceof".
// The following format* methods format and display the
// values in some meaningful ways in the GUI. They are
// left as exercise for the readers.
formatAttribute(attrs[i].getName());
if (attrs[i] instanceof StringAttribute) {
formatString(p.getValue((StringAttribute)attrs[i]));
}
else if (attrs[i] instanceof DateAttribute) {
formatDate(p.getValue((DateAttribute)attrs[i]));
}
// More...
}
}