How to update user profile photo with msgraph-sdk-java? - microsoft-graph-api

Here is what I have so far:
ProfilePhoto photo = new ProfilePhoto();
photo.???
IProfilePhotoRequest request = graphServiceClient.users(userId).photo().buildRequest();
request.patch(photo, new ICallback<ProfilePhoto>(){
#Override
public void success(final ProfilePhoto result) {
}
#Override
public void failure(ClientException e) {
}
});
However I don't know how to set the 'Binary data for the image':
PUT https://graph.microsoft.com/v1.0/me/photo/$value
Content-type: image/jpeg
Binary data for the image

You need to use BaseProfilePhotoStreamRequest but not the one in your code. Such thing like:
IBaseProfilePhotoStreamRequest request = graphServiceClient.users(userId).photo().getContent().buildRequest();
request.put(imageBytes);
Reference Code to get image binary:
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class TestImageBinary {
static BASE64Encoder encoder = new sun.misc.BASE64Encoder();
static BASE64Decoder decoder = new sun.misc.BASE64Decoder();
public static void main(String[] args) {
System.out.println(getImageBinary());
base64StringToImage(getImageBinary());
}
static String getImageBinary(){
File f = new File("c://20090709442.jpg");
BufferedImage bi;
try {
bi = ImageIO.read(f);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(bi, "jpg", baos);
byte[] bytes = baos.toByteArray();
return encoder.encodeBuffer(bytes).trim();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}

Related

How to publish and receive data from Android Studio and have it on Google Cloud IoT Core?

I'm a student doing an Android Things project, which is about connecting Rasperi pi with an Accelerometer sensor to get acceleration data, I finished the coding part in Android Studio and the sensor is working fine, then I tried to connect my project to the cloud by following this tutorial: http://blog.blundellapps.co.uk/tut-google-cloud-iot-core-mqtt-on-android/
I think I have to publish the accelerometer data to the cloud by calling this method below in MainActivity class, I did that but still have an error, see the update I did at end of this question please.
#Override
public void onSensorChanged(SensorEvent event) {
Log.d(TAG, "Accel X " + event.values[0]);
Log.d(TAG, "Accel Y " + event.values[1]);
Log.d(TAG, "Accel Z " + event.values[2]);
}
Also, do I have to do something in the cloud platform to receive the data?, I already set up the communication with my Google IoT Core details as shown in the below code:
communicator = new IotCoreCommunicator.Builder()
.withContext(this)
.withCloudRegion("us-central1")
.withProjectId("my-first-project-198704")
.withRegistryId("vibration")
.withDeviceId("my-device")
.withPrivateKeyRawFileId(R.raw.rsa_private)
.build();
This is what I'm seeing in the cloud:
And this is the acceleration data I have in Android Studio:
My project consists of two modules but here I will attach only the second module because the question is limited to 3000 characters only and the second module is what I need to edit I think.
sample module:
AccelerometerActivity class:
package com.cacaosd.sample;
import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.util.Log;
import com.cacaosd.adxl345.ADXL345SensorDriver;
import com.cacaosd.sample.BoardDefaults;
import java.io.IOException;
public class AccelerometerActivity extends Activity implements SensorEventListener {
private static final String TAG = AccelerometerActivity.class.getSimpleName();
private ADXL345SensorDriver mSensorDriver;
private SensorManager mSensorManager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
mSensorManager.registerDynamicSensorCallback(new SensorManager.DynamicSensorCallback() {
#Override
public void onDynamicSensorConnected(Sensor sensor) {
if (sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
mSensorManager.registerListener(AccelerometerActivity.this,
sensor, SensorManager.SENSOR_DELAY_NORMAL);
}
}
});
try {
mSensorDriver = new ADXL345SensorDriver(BoardDefaults.getI2CPort());
mSensorDriver.registerAccelerometerSensor();
} catch (IOException e) {
Log.e(TAG, "Error configuring sensor", e);
}
}
#Override
protected void onDestroy() {
super.onDestroy();
Log.i(TAG, "Closing sensor");
if (mSensorDriver != null) {
mSensorManager.unregisterListener(this);
try {
mSensorDriver.close();
} catch (IOException e) {
Log.e(TAG, "Error closing sensor", e);
} catch (Exception e) {
e.printStackTrace();
} finally {
mSensorDriver = null;
}
}
}
#Override
public void onSensorChanged(SensorEvent event) {
Log.d(TAG, "Accel X " + event.values[0]);
Log.d(TAG, "Accel Y " + event.values[1]);
Log.d(TAG, "Accel Z " + event.values[2]);
}
#Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
Log.i(TAG, "sensor accuracy changed: " + accuracy);
}
}
BoardDefaults class:
package com.cacaosd.sample;
import android.os.Build;
import com.google.android.things.pio.PeripheralManagerService;
import java.util.List;
/**
* Created by cagdas on 20.12.2016.
*/
#SuppressWarnings("WeakerAccess")
public class BoardDefaults {
private static final String DEVICE_EDISON_ARDUINO = "edison_arduino";
private static final String DEVICE_EDISON = "edison";
private static final String DEVICE_RPI3 = "rpi3";
private static final String DEVICE_NXP = "imx6ul";
private static String sBoardVariant = "";
/**
* Return the preferred I2C port for each board.
*/
public static String getI2CPort() {
switch (getBoardVariant()) {
case DEVICE_EDISON_ARDUINO:
return "I2C6";
case DEVICE_EDISON:
return "I2C1";
case DEVICE_RPI3:
return "I2C1";
case DEVICE_NXP:
return "I2C2";
default:
throw new IllegalStateException("Unknown Build.DEVICE " + Build.DEVICE);
}
}
private static String getBoardVariant() {
if (!sBoardVariant.isEmpty()) {
return sBoardVariant;
}
sBoardVariant = Build.DEVICE;
// For the edison check the pin prefix
// to always return Edison Breakout pin name when applicable.
if (sBoardVariant.equals(DEVICE_EDISON)) {
PeripheralManagerService pioService = new PeripheralManagerService();
List<String> gpioList = pioService.getGpioList();
if (gpioList.size() != 0) {
String pin = gpioList.get(0);
if (pin.startsWith("IO")) {
sBoardVariant = DEVICE_EDISON_ARDUINO;
}
}
}
return sBoardVariant;
}
}
IotCoreCommunicator class:
package com.cacaosd.sample1;
import android.content.Context;
import android.util.Log;
import java.util.concurrent.TimeUnit;
import org.eclipse.paho.android.service.MqttAndroidClient;
import org.eclipse.paho.client.mqttv3.IMqttActionListener;
import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.IMqttToken;
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.MqttMessage;
public class IotCoreCommunicator {
private static final String SERVER_URI = "ssl://mqtt.googleapis.com:8883";
public static class Builder {
private Context context;
private String projectId;
private String cloudRegion;
private String registryId;
private String deviceId;
private int privateKeyRawFileId;
public Builder withContext(Context context) {
this.context = context;
return this;
}
public Builder withProjectId(String projectId) {
this.projectId = projectId;
return this;
}
public Builder withCloudRegion(String cloudRegion) {
this.cloudRegion = cloudRegion;
return this;
}
public Builder withRegistryId(String registryId) {
this.registryId = registryId;
return this;
}
public Builder withDeviceId(String deviceId) {
this.deviceId = deviceId;
return this;
}
public Builder withPrivateKeyRawFileId(int privateKeyRawFileId) {
this.privateKeyRawFileId = privateKeyRawFileId;
return this;
}
public IotCoreCommunicator build() {
if (context == null) {
throw new IllegalStateException("context must not be null");
}
if (projectId == null) {
throw new IllegalStateException("projectId must not be null");
}
if (cloudRegion == null) {
throw new IllegalStateException("cloudRegion must not be null");
}
if (registryId == null) {
throw new IllegalStateException("registryId must not be null");
}
if (deviceId == null) {
throw new IllegalStateException("deviceId must not be null");
}
String clientId = "projects/" + projectId + "/locations/" + cloudRegion + "/registries/" + registryId + "/devices/" + deviceId;
if (privateKeyRawFileId == 0) {
throw new IllegalStateException("privateKeyRawFileId must not be 0");
}
MqttAndroidClient client = new MqttAndroidClient(context, SERVER_URI, clientId);
IotCorePasswordGenerator passwordGenerator = new IotCorePasswordGenerator(projectId, context.getResources(), privateKeyRawFileId);
return new IotCoreCommunicator(client, deviceId, passwordGenerator);
}
}
private final MqttAndroidClient client;
private final String deviceId;
private final IotCorePasswordGenerator passwordGenerator;
IotCoreCommunicator(MqttAndroidClient client, String deviceId, IotCorePasswordGenerator passwordGenerator) {
this.client = client;
this.deviceId = deviceId;
this.passwordGenerator = passwordGenerator;
}
public void connect() {
monitorConnection();
clientConnect();
subscribeToConfigChanges();
}
private void monitorConnection() {
client.setCallback(new MqttCallback() {
#Override
public void connectionLost(Throwable cause) {
Log.e("TUT", "connection lost", cause);
}
#Override
public void messageArrived(String topic, MqttMessage message) throws Exception {
Log.d("TUT", "message arrived " + topic + " MSG " + message);
// You need to do something with messages when they arrive
}
#Override
public void deliveryComplete(IMqttDeliveryToken token) {
Log.d("TUT", "delivery complete " + token);
}
});
}
private void clientConnect() {
try {
MqttConnectOptions connectOptions = new MqttConnectOptions();
// Note that the the Google Cloud IoT Core only supports MQTT 3.1.1, and Paho requires that we explicitly set this.
// If you don't, the server will immediately close its connection to your device.
connectOptions.setMqttVersion(MqttConnectOptions.MQTT_VERSION_3_1_1);
// With Google Cloud IoT Core, the username field is ignored, however it must be set for the
// Paho client library to send the password field. The password field is used to transmit a JWT to authorize the device.
connectOptions.setUserName("unused-but-necessary");
connectOptions.setPassword(passwordGenerator.createJwtRsaPassword());
IMqttToken iMqttToken = client.connect(connectOptions);
iMqttToken.setActionCallback(new IMqttActionListener() {
#Override
public void onSuccess(IMqttToken asyncActionToken) {
Log.d("TUT", "success, connected");
}
#Override
public void onFailure(IMqttToken asyncActionToken, Throwable exception) {
Log.e("TUT", "failure, not connected", exception);
}
});
iMqttToken.waitForCompletion(TimeUnit.SECONDS.toMillis(30));
Log.d("TUT", "IoT Core connection established.");
} catch (MqttException e) {
throw new IllegalStateException(e);
}
}
/**
* Configuration is managed and sent from the IoT Core Platform
*/
private void subscribeToConfigChanges() {
try {
client.subscribe("/devices/" + deviceId + "/config", 1);
} catch (MqttException e) {
throw new IllegalStateException(e);
}
}
public void publishMessage(String subtopic, String message) {
String topic = "/devices/" + deviceId + "/" + subtopic;
String payload = "{msg:\"" + message + "\"}";
MqttMessage mqttMessage = new MqttMessage(payload.getBytes());
mqttMessage.setQos(1);
try {
client.publish(topic, mqttMessage);
Log.d("TUT", "IoT Core message published. To topic: " + topic);
} catch (MqttException e) {
throw new IllegalStateException(e);
}
}
public void disconnect() {
try {
Log.d("TUT", "IoT Core connection disconnected.");
client.disconnect();
} catch (MqttException e) {
throw new IllegalStateException(e);
}
}
}
IotCorePasswordGenerator class:
package com.cacaosd.sample1;
import android.content.res.Resources;
import android.util.Base64;
import java.io.IOException;
import java.io.InputStream;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.time.Duration;
import java.time.Instant;
import java.util.Date;
import io.jsonwebtoken.JwtBuilder;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
class IotCorePasswordGenerator {
private final String projectId;
private final Resources resources;
private final int privateKeyRawFileId;
IotCorePasswordGenerator(String projectId, Resources resources, int privateKeyRawFileId) {
this.projectId = projectId;
this.resources = resources;
this.privateKeyRawFileId = privateKeyRawFileId;
}
char[] createJwtRsaPassword() {
try {
byte[] privateKeyBytes = decodePrivateKey(resources, privateKeyRawFileId);
return createJwtRsaPassword(projectId, privateKeyBytes).toCharArray();
} catch (NoSuchAlgorithmException e) {
throw new IllegalStateException("Algorithm not supported. (developer error)", e);
} catch (InvalidKeySpecException e) {
throw new IllegalStateException("Invalid Key spec. (developer error)", e);
} catch (IOException e) {
throw new IllegalStateException("Cannot read private key file.", e);
}
}
private static byte[] decodePrivateKey(Resources resources, int privateKeyRawFileId) throws IOException {
try(InputStream inStream = resources.openRawResource(privateKeyRawFileId)) {
return Base64.decode(inputToString(inStream), Base64.DEFAULT);
}
}
private static String inputToString(InputStream is) {
java.util.Scanner s = new java.util.Scanner(is).useDelimiter("\\A");
return s.hasNext() ? s.next() : "";
}
private static String createJwtRsaPassword(String projectId, byte[] privateKeyBytes) throws NoSuchAlgorithmException, InvalidKeySpecException {
return createPassword(projectId, privateKeyBytes, "RSA", SignatureAlgorithm.RS256);
}
private static String createPassword(String projectId, byte[] privateKeyBytes, String algorithmName, SignatureAlgorithm signatureAlgorithm) throws NoSuchAlgorithmException, InvalidKeySpecException {
Instant now = Instant.now();
// Create a JWT to authenticate this device. The device will be disconnected after the token
// expires, and will have to reconnect with a new token. The audience field should always be set
// to the GCP project id.
JwtBuilder jwtBuilder =
Jwts.builder()
.setIssuedAt(Date.from(now))
.setExpiration(Date.from(now.plus(Duration.ofMinutes(20))))
.setAudience(projectId);
PKCS8EncodedKeySpec spec = new PKCS8EncodedKeySpec(privateKeyBytes);
KeyFactory kf = KeyFactory.getInstance(algorithmName);
return jwtBuilder.signWith(signatureAlgorithm, kf.generatePrivate(spec)).compact();
}
}
MainActivity class:
package com.cacaosd.sample1;
import android.app.Activity;
import android.hardware.SensorEvent;
import android.os.Bundle;
import android.os.HandlerThread;
import android.os.Handler;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.util.Log;
import com.cacaosd.sample.AccelerometerActivity;
import com.cacaosd.sample.R;
import com.cacaosd.sample1.IotCoreCommunicator;
import com.google.android.things.pio.Gpio;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
public class MainActivity extends Activity {
AccelerometerActivity mAccelerometerActivity = new AccelerometerActivity();
private IotCoreCommunicator communicator;
private Handler handler;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Setup the communication with your Google IoT Core details
communicator = new IotCoreCommunicator.Builder()
.withContext(this)
.withCloudRegion("us-central1") // ex: europe-west1
.withProjectId("my-first-project-198704") // ex: supercoolproject23236
.withRegistryId("vibration") // ex: my-devices
.withDeviceId("my-device") // ex: my-test-raspberry-pi
.withPrivateKeyRawFileId(R.raw.rsa_private)
.build();
HandlerThread thread = new HandlerThread("MyBackgroundThread");
thread.start();
handler = new Handler(thread.getLooper());
handler.post(connectOffTheMainThread); // Use whatever threading mechanism you want
}
private final Runnable connectOffTheMainThread = new Runnable() {
#Override
public void run() {
communicator.connect();
handler.post(sendMqttMessage);
}
};
private final Runnable sendMqttMessage = new Runnable() {
private int i;
/**
* We post 100 messages as an example, 1 a second
*/
#Override
public void run() {
if (i == 100) {
return;
}
SensorEvent event = null;
// events is the default topic for MQTT communication
String subtopic = "events";
// Your message you want to send
String message = "Hello World " + i++;
communicator.publishMessage(subtopic, message);
handler.postDelayed(this, TimeUnit.SECONDS.toMillis(1));
}
};
#Override
protected void onDestroy() {
communicator.disconnect();
super.onDestroy();
}
MainActivity class:
package com.cacaosd.sample1;
import android.app.Activity;
import android.hardware.SensorEvent;
import android.os.Bundle;
import android.os.HandlerThread;
import android.os.Handler;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.util.Log;
import com.cacaosd.sample.AccelerometerActivity;
import com.cacaosd.sample.R;
import com.cacaosd.sample1.IotCoreCommunicator;
import com.google.android.things.pio.Gpio;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
public class MainActivity extends Activity {
AccelerometerActivity mAccelerometerActivity = new AccelerometerActivity();
private IotCoreCommunicator communicator;
private Handler handler;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Setup the communication with your Google IoT Core details
communicator = new IotCoreCommunicator.Builder()
.withContext(this)
.withCloudRegion("us-central1") // ex: europe-west1
.withProjectId("my-first-project-198704") // ex: supercoolproject23236
.withRegistryId("vibration") // ex: my-devices
.withDeviceId("my-device") // ex: my-test-raspberry-pi
.withPrivateKeyRawFileId(R.raw.rsa_private)
.build();
HandlerThread thread = new HandlerThread("MyBackgroundThread");
thread.start();
handler = new Handler(thread.getLooper());
handler.post(connectOffTheMainThread); // Use whatever threading mechanism you want
}
private final Runnable connectOffTheMainThread = new Runnable() {
#Override
public void run() {
communicator.connect();
handler.post(sendMqttMessage);
}
};
private final Runnable sendMqttMessage = new Runnable() {
private int i;
/**
* We post 100 messages as an example, 1 a second
*/
#Override
public void run() {
if (i == 100) {
return;
}
SensorEvent event = null;
// events is the default topic for MQTT communication
String subtopic = "events";
// Your message you want to send
String message = "Hello World " + i++;
communicator.publishMessage(subtopic, message);
handler.postDelayed(this, TimeUnit.SECONDS.toMillis(1));
}
};
#Override
protected void onDestroy() {
communicator.disconnect();
super.onDestroy();
}
}
Update:
I added a third input (int acceleration) on publishMessage() method inside IotCoreCommunicator class like below:
public void publishMessage(String subtopic, String message, int acceleration) {
String topic = "/devices/" + deviceId + "/" + subtopic;
String payload = "{msg:\"" + message + "\"}";
MqttMessage mqttMessage = new MqttMessage(payload.getBytes());
mqttMessage.setQos(1);
try {
client.publish(topic, mqttMessage);
Log.d("TUT", "IoT Core message published. To topic: " + topic);
} catch (MqttException e) {
throw new IllegalStateException(e);
}
}
Then I call it on run() method inside the MainActivity class like below:
public void run() {
if (i == 100) {
return;
}
SensorEvent event = null;
// events is the default topic for MQTT communication
String subtopic = "events";
// Your message you want to send
String message = "Hello World " + i++;
int acceleration = mAccelerometerActivity.onSensorChanged(SensorEvent event.values);
communicator.publishMessage(subtopic, message, acceleration);
handler.postDelayed(this, TimeUnit.SECONDS.toMillis(1));
}
};
But I still have this error in the below screenshot:
(';' or ) expected)
Also the third input I added is shown like never been used as you see in the screenshot below, is this has any effect?
Thank you.

Class not found exception on com.itextpdf.text.pdf.parser.RenderListener

I am trying to parse PDF files in Mapreduce using custom input format class as below:
import java.io.IOException;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.JobContext;
import org.apache.hadoop.mapreduce.RecordReader;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
public class PdfFileInputFormat extends FileInputFormat<LongWritable, Text> {
#Override
public RecordReader<LongWritable, Text> createRecordReader(InputSplit split,
TaskAttemptContext context) throws IOException, InterruptedException {
System.out.println("Entered PdfFileInputFormat class");
return new PdfRecordReader();
}
#Override
protected boolean isSplitable(JobContext context, Path file) {
return false;
}
}
and my pdf reader class is:
package com.pdf.prac;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.RecordReader;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.lib.input.FileSplit;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.parser.PdfReaderContentParser;
import com.itextpdf.text.pdf.parser.SimpleTextExtractionStrategy;
import com.itextpdf.text.pdf.parser.TextExtractionStrategy;
import com.itextpdf.text.pdf.parser.RenderListener;
public class PdfRecordReader extends RecordReader<LongWritable, Text> {
private int flag = 0;
private LongWritable key = null;
private Text value = null;
private PdfReader reader;
private PdfReaderContentParser parser;
private TextExtractionStrategy strategy;
private FSDataInputStream fileIn;
private List<String> records = new ArrayList<String>();
public void initialize(InputSplit genericSplit, TaskAttemptContext context)
throws IOException {
System.out.println("Executing initialize........");
FileSplit split = (FileSplit) genericSplit;
Configuration conf = context.getConfiguration();
final Path file = split.getPath();
FileSystem fs = file.getFileSystem(conf);
this.fileIn = fs.open(split.getPath());
this.reader = new PdfReader(fileIn);
this.parser = new PdfReaderContentParser(reader);
readRecords();
}
public synchronized boolean nextKeyValue() throws IOException {
System.out.println("Executing nextKey........Total Records : " + records.size() + "; Flag : " + (flag++));
int index = 0;
if (key == null) {
key = new LongWritable(index);
} else {
index = (int) key.get();
key.set(++index);
}
if (value == null) {
value = new Text(records.get(index));
} else {
value.set(records.get(index));
}
if (flag == records.size()) {
return false;
} else {
return true;
}
}
#Override
public LongWritable getCurrentKey() {
return key;
}
#Override
public Text getCurrentValue() {
return value;
}
/**
* Get the progress within the split
*/
public float getProgress() {
return 0;
}
public synchronized void close() throws IOException {
if (fileIn != null) {
fileIn.close();
}
}
private void readRecords() throws IOException {
if (reader != null) {
for (int i = 1; i <= reader.getNumberOfPages(); i++) {
strategy = parser.processContent(i, new SimpleTextExtractionStrategy());
if (strategy != null) {
/* String[] content = (strategy.getResultantText()).split("\n");
for (String str : content) {
records.add(str);
}*/
StringTokenizer tokens = new StringTokenizer(strategy.getResultantText(), "\n");
while (tokens.hasMoreTokens()) {
records.add(tokens.nextToken());
}
}
}
reader.close();
}
return;
}
}
But this is giving a class not found exception on com.itextpdf.text.pdf.parser.RenderListener at the runtime on hadoop environment. Appreciate any help on this. All the jar files are correctly added on build path and there are no multiple jars as well.

which is better approach while getting data from server and display on list?

Hi can you please tell me which is a better approach while getting data from server and displaying on a list?
package mypackage;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import net.rim.device.api.io.IOUtilities;
import net.rim.device.api.ui.component.Dialog;
public class ConnectJson extends Thread {
private String url;
public String response;
private String myinterface = ";deviceside=true";
private JsonObserver observer;
public void run() {
HttpConnection conn = null;
InputStream in = null;
int code;
try {
conn = (HttpConnection) Connector.open(this.url + this.myinterface, Connector.READ);
conn.setRequestMethod(HttpConnection.GET);
code = conn.getResponseCode();
System.out.println("naveen-------------------------");
if (code == HttpConnection.HTTP_OK) {
in = conn.openInputStream();
byte[] buffer = IOUtilities.streamToBytes(in);
this.response = new String(buffer,"UTF-8");
if (observer != null) {
observer.onResponseReceived(this.response);
}
if (in != null){
in.close();
}
if (conn != null){
conn.close();
}
}
} catch (Exception e) {
Dialog.inform(e.toString());
}
}
public String jsonResult(String url){
this.url = url;
this.start();
// this.run();
return response;
}
public void setObserver(JsonObserver o) {
this.observer = o;
}
}
package mypackage;
import java.util.Vector;
import xjson.me.JSONArray;
import xjson.me.JSONException;
import xjson.me.JSONObject;
import net.rim.device.api.system.Display;
import net.rim.device.api.ui.Color;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.component.ButtonField;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.component.ObjectChoiceField;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.container.VerticalFieldManager;
/**
* A class extending the MainScreen class, which provides default standard
* behavior for BlackBerry GUI applications.
*/
public final class MyScreen extends MainScreen implements JsonObserver
{
/**
* Creates a new MyScreen object
*/
public MyScreen()
{
ConnectJson connectJson = new ConnectJson();
System.out.println("------------------");
connectJson.setObserver(this);
connectJson.jsonResult("http://musicbrainz.org/ws/2/release/59211ea4-ffd2-4ad9-9a4e-941d3148024a?inc=artist-credits+labels+discids+recordings&fmt=json");
System.out.println("---------bbbbb---------");
}
public void onResponseReceived(String response) {
System.out.println("000000000000000000000000000000000"+response);
// TODO: create or update your ListField here!!!
}
}
package mypackage;
public interface JsonObserver {
public void onResponseReceived(String response);
}
Well, first of all, this will not work:
public String jsonResult(String url){
this.url = url;
this.start();
return response;
}
Calling start() will cause run() to be called on a background thread (that's good). However, immediately after you start the background thread, you return the response member variable. That won't work, because the run() method hasn't had time to actually assign the response variable.
What you need to do is assign the response variable at the end of the run() method, and then notify the UI on the main/UI thread, to let it update the user interface. Something like this:
if (code == HttpConnection.HTTP_OK) {
in = conn.openInputStream();
byte[] buffer = IOUtilities.streamToBytes(in);
this.response = new String(buffer,"UTF-8");
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
// this code is run on the main/UI thread
if (observer != null) {
observer.onResponseReceived(this.response);
}
}
});
where you add a new observer interface
public interface JsonObserver {
public void onResponseReceived(String response);
}
and then you can let your MainScreen implement that interface:
public class MyScreen extends MainScreen implements JsonObserver {
public MyScreen()
{
connectJson.setObserver(this);
// start the json request
connectJson.jsonResult("http://musicbrainz.org/ws/2/release/59211ea4-ffd2-4ad9-9a4e-941d3148024a?inc=artist-credits+labels+d...");
}
public void onResponseReceived(String response) {
System.out.println("000000000000000000000000000000000"+response);
// TODO: create or update your ListField here!!!
}
Of course, you'll need a new member and method in the ConnectJson class, too:
private JsonObserver observer;
public void setObserver(JsonObserver o) {
observer = o;
}
Note: it also might be better, for thread safety, to change your response member variable to a simple local final variable. I can't know all the ways that you plan on using it, but if it's just a way to hold onto the JSON response, you probably don't need a member variable. Try this instead (inside of run()):
final String response = new String(buffer,"UTF-8");
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
observer.onResponseReceived(response);

Excel Array Java

I imported my excel file into Java. I am now trying to randomly pick 5 people from my data. How would I go about doing that... Here is my code that I have so far.
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.StringTokenizer;
public class Rewards {
public static void main(String[] args) throws FileNotFoundException, IOException {
String fileName = "C:/Users/Jordan/Desktop/Project5.csv";
try {
BufferedReader br = new BufferedReader(new FileReader(fileName));
String strLine = null;
StringTokenizer st = null;
int lineNumber = 0, tokenNumber = 0;
while((fileName = br.readLine()) != null) {
lineNumber++;
String[] result = fileName.split(",");
for (int x=0; x<result.length; x++) {
System.out.println(result[x]);
}
}
}
catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
I'd start with a Random instance. How else can you do anything pseudo-randomly in any programming language?

Json parsing in Blackberry 5.0

i am developing app in blackberry version 5.0, and i had import all library which require for json in 5.0.
i had download library from this url
http://supportforums.blackberry.com/t5/Java-Development/JSON-library/td-p/573687
even i not getting response, what i had miss in this code please help me.
Below is my code For json parsing.
package mypackage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import JSON_ME_Library.src.org.json.me.JSONArray;
import JSON_ME_Library.src.org.json.me.JSONException;
import JSON_ME_Library.src.org.json.me.JSONObject;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.ButtonField;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.MainScreen;
public final class MyScreen extends MainScreen
{
String url="http://www.appymail.com/iphone-messenger/456842/";
public MyScreen()
{
setTitle("Json Parsing Sample");
String aa=jsonresponse(url);
if(aa.equalsIgnoreCase(""))
{
add(new LabelField("NO res"));
}
else
{
parseJSONResponceInBB(aa);
}
}
void parseJSONResponceInBB(String jsonInStrFormat)
{
try {
JSONObject json = new JSONObject(jsonInStrFormat);
JSONArray jArray= json.getJSONArray("messages");
//JSONArray arr=jArray.getJSONArray(0);
for(int i=0;i<jArray.length();i++)
{
JSONObject j = jArray.getJSONObject(i);
String from = j.getString("id");
add(new LabelField("id=="+from));
String to =j.getString("title");
add(new LabelField("title=="+to));
String message=j.getString("body");
add(new LabelField("Body=="+message));
}
} catch (JSONException e)
{
e.printStackTrace();
}
}
public static String jsonresponse (String url)
{
String response = null;
HttpConnection httpConnection = null;
InputStream inStream = null;
int code;
StringBuffer stringBuffer = new StringBuffer();
try {
httpConnection = (HttpConnection) Connector.open(url, Connector.READ);
httpConnection.setRequestMethod(HttpConnection.GET);
code = httpConnection.getResponseCode();
if(code == HttpConnection.HTTP_OK)
{
inStream=httpConnection.openInputStream();
int c;
while((c=inStream.read())!=-1)
{
stringBuffer.append((char)c);
}
response=stringBuffer.toString();
System.out.println("Response Getting from Server is ================" + response);
}
else
{
UiApplication.getUiApplication().invokeLater(new Runnable()
{
public void run()
{
Dialog.inform("Connection error");
}
});
}
}
catch (Exception e)
{
System.out.println("caught exception in jsonResponse method"+e.getMessage());
}
finally
{
// if (outputStream != null)
// {
// outputStream.close();
// }
if (inStream != null)
{
try {
inStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (httpConnection != null )
{
try {
httpConnection.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return response;
}
}
Hello dear you need to use url extension for blackberry
so please try to change this line
String aa=jsonresponse(url);
as
String aa=jsonresponse(url+";interface=wifi");
After successfully completed download data from url then once check String aa getting any value or not? if it get data then follow
try this if it is working fine then go through this following link
Guide for URL extensions
Enter Url in
String url="Your url";
String request=jsonresponse(url+";interface=wifi");
String response = parseJSONResponceInBB(request);
if(response .equalsIgnoreCase(""))
{
add(new LabelField("NO res"));
}
else
{
add(new LabelField(response ));
}

Resources