listing16-06_recordstorereader.java_ok

来自「着几乎所有智能机厂商都将有自己配套的App Store,甚至并非智能手机制造商的」· JAVA_OK 代码 · 共 52 行

// Listing 16-6. Filtering and Sorting a Record Store Simultaneously



import javax.microedition.rms.*;

import de.enough.polish.util.ArrayList;

public class RecordStoreReader {

	private final ArrayList list;

	public RecordStoreReader( Object condition )
	throws RecordStoreException
	{

		// open record store:
		RecordStore store = RecordStore.openRecordStore( "store", false );
		// enumerate the record sets the fastest possible way:
		RecordEnumeration enumeration =
			store.enumerateRecords( null, null, false );
		ArrayList recordList = new ArrayList( enumeration.numRecords() );

		while ( enumeration.hasNextElement() ) {
			MyRecordData data = new MyRecordData( enumeration.nextRecord() );

			if ( !data.conditionFulfilled( condition ) ) {
				continue;
			}
			boolean notInserted = true;
			for ( int i = recordList.size(); --i >= 0; ) {
				MyRecordData compare = (MyRecordData) recordList.get( i );

				if ( data.compare( compare ) != RecordComparator.PRECEDES ) {
					recordList.add( i + 1, data );
					notInserted = false;
					break;
				}
			}
			if ( notInserted ) {
				recordList.add( 0, data );
			}	
		}
		store.closeRecordStore();
		this.list = recordList;
	}

	public ArrayList getRecords() {
		return this.list;
	}
}