JsLogHandler.java

package client.net.sf.saxon.ce.lib;

import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogRecord;

import client.net.sf.saxon.ce.SaxonceApi;
import client.net.sf.saxon.ce.js.JSObjectValue;

import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.core.client.ScriptInjector;
import com.google.gwt.logging.client.TextLogFormatter;

/**
 * A Handler that raises JavaScript log events to the host environment
 * Modelled on the GWT Console Logger
 * 
 * Sample client-side JavaScript required to handle log events:
 * 
 
// ------------ This is the error handler --------------------
function handleIxslError() {
    var e = ixslLogData;
    alert(e.details + "\n\n" + e.type);
}

// ------ this adds a listener for the IXSL Event -----------
if (window.addEventListener) {
    window.addEventListener("ixslLogEvent", handleIxslError, false);
} else if (window.attachEvent) {
    window.attachEvent("onixslLogEvent", handleIxslError);
} else if (window.onLoad) {
window.onixslLogEvent = handleIxslError;
}
-------------------------------------------------------------
 *
 *   window.addEventListener("ixslError", handleIxslError, false);
 */
public class JsLogHandler extends Handler {

  public JsLogHandler() {
	setFormatter(new SaxonLogFormatter(true));
    setLevel(Level.ALL);
  }
  
  @Override
  public void close() {
    // No action needed
  }

  @Override
  public void flush() {
    // No action needed
  }

  @Override
  public void publish(LogRecord record) {
    if (!isLoggable(record)) {
      return;
    }
    String msg = getFormatter().format(record);

    SaxonceApi.makeCallback(msg, record.getLevel().getName(), String.valueOf(record.getMillis()));
  }
}