AndroidLogSerializer.java

package org.commcare.android.javarosa;

import java.io.IOException;
import java.util.Hashtable;

import org.commcare.android.database.SqlStorage;
import org.javarosa.core.log.LogEntry;
import org.javarosa.core.log.StreamLogSerializer;
import org.javarosa.core.model.utils.DateUtils;
import org.javarosa.core.services.Logger;
import org.javarosa.core.services.storage.EntityFilter;
import org.javarosa.core.util.SortedIntSet;
import org.xmlpull.v1.XmlSerializer;

/**
 * @author ctsims
 *
 */
public class AndroidLogSerializer extends StreamLogSerializer implements DeviceReportElement {
    SqlStorage<AndroidLogEntry> storage;
    LogEntry entry;
    
    XmlSerializer serializer;
    
    public AndroidLogSerializer(LogEntry entry) {
        this.entry = entry;
    }

    public AndroidLogSerializer(SqlStorage<AndroidLogEntry> logStorage) throws IOException {
        super();
        this.storage = logStorage;
        
        this.setPurger(new Purger() {

            /*
             * (non-Javadoc)
             * @see org.javarosa.core.log.StreamLogSerializer.Purger#purge(org.javarosa.core.util.SortedIntSet)
             */
            @Override
            public void purge(final SortedIntSet IDs) {
                storage.removeAll(new EntityFilter<LogEntry> () {
                    public int preFilter (int id, Hashtable<String, Object> metaData) {
                        return IDs.contains(id) ? PREFILTER_INCLUDE : PREFILTER_EXCLUDE;
                    }

                    public boolean matches(LogEntry e) {
                        throw new RuntimeException("can't happen");
                    }
                });

            }
            
        });
    }
    
    /*
     * (non-Javadoc)
     * @see org.javarosa.core.log.StreamLogSerializer#serializeLog(org.javarosa.core.log.LogEntry)
     */
    @Override
    protected void serializeLog(LogEntry entry) throws IOException {
        String dateString = DateUtils.formatDateTime(entry.getTime(), DateUtils.FORMAT_ISO8601);
        
        serializer.startTag(DeviceReportWriter.XMLNS,"log");
        try {
            serializer.attribute(null,"date", dateString);
            writeText("type", entry.getType());
            writeText("msg", entry.getMessage());
        } catch(Exception e) {
            e.printStackTrace();
        } finally {
            serializer.endTag(DeviceReportWriter.XMLNS,"log");
        }
    }
    
    private void writeText(String element, String text) throws IllegalArgumentException, IllegalStateException, IOException {
        serializer.startTag(DeviceReportWriter.XMLNS,element);
        try {
            serializer.text(text);
        } catch(Exception e) {
            e.printStackTrace();
        } finally {
            serializer.endTag(DeviceReportWriter.XMLNS,element);
        }
    }

    /*
     * (non-Javadoc)
     * @see org.commcare.android.javarosa.DeviceReportElement#writeToDeviceReport(org.xmlpull.v1.XmlSerializer)
     */
    @Override
    public void writeToDeviceReport(XmlSerializer serializer) throws IOException {
        //TODO: Stop doing what the special case here is for
        this.serializer = serializer;
        
        serializer.startTag(DeviceReportWriter.XMLNS, "log_subreport");
        
        try  {
            if(storage != null) {
                if(Logger._() != null) {
                    Logger._().serializeLogs(this);
                }
            } else {
                serializeLog(entry);
            }
        } finally {
            serializer.endTag(DeviceReportWriter.XMLNS, "log_subreport");
        }
    }
}