I am writing script in scala to lemmatize some text using wordnetlemmatizer from the this link.
API says lemmatizer object can be created new wordNetLemmatizer(wordnet dir)
How can i pass this input stream of word net dir as parameter to above.
This is my reference.
Any help will be appreciated.
Your link goes to the object WordNetLemmatizer. As you probably now an object is a singleton and you can not do new on an object.
The documentation for the class is here http://factorie.cs.umass.edu/scaladocs/index.html#cc.factorie.app.nlp.lemma.WordNetLemmatizer
The class WordNetLemmatizer offers a constructor with a File, so you can do
new WordNetLemmatizer(new File("/home/xxx/wordnet"))
Related
So there's a lot of questions and examples around of reading external .class files using a ClassLoader but I'm struggling to see where I'm going wrong.
val folderUrl: URL = new File("D:/tmp/").toURI.toURL //file:/D:/tmp/
val cl: URLClassLoader = new URLClassLoader(Array(folderUrl), this.getClass.getClassLoader)
cl.loadClass("my.package.MyClassName")
The last line throws a ClassNotFoundException
The folder D:/tmp/ contains a class file "MyClassName.class".
The class has the package "my.package"
The class is called "MyClassName"
I can't understand what I'm doing wrong?
EDIT:
The two closest question which relate are:
Scala - Dynamic object/class loading
How do I call a Scala Object method using reflection?
But these both do not have my problem however, they both get further than I have done where they successfully load the class before running into issues.
So the issue was the fact that the folder structure did not match the package name.
So my folder structure was
D:/tmp/MyClassName.class
The full class name was
my.package.MyClassName
The class loader requires that the folder structure be
D:/tmp/my/package/MyClassName.class
I would like to show some data from the database in the menubar of my web page. To get the data, I have a data-access-object (DAO) which is usually created with Guice injection.
How can I use such an (injected) object in my Scala templates?
I could pass it as a parameter to the template, but I had to do this on every single page (because it should be displayed in the menubar). I'm looking for another solution where I don't have to pass it everywhere. Currently I'm creating a new object inside the template, whenever it is rendered (which gets me a cleaner code but a worse performance).
You can kinda-sorta fake this without too much effort.
First, create a Scala object that provides access to your DAO (this can contain as many things as you want, just repeat the pattern within the top-level object and the Implicits object).
package com.example.stuff
object ViewAccessPoint {
private[stuff] val myDaoCache = Application.instanceCache[MyDao]
object Implicits {
implicit def myDao(implicit application: Application): MyDao = myDaoCache(application)
}
}
In your view, you can then import the Implicits object into your template and get hold of the DAO created by Guice.
#import com.example.stuff.ViewAccessPoint.Implicits._
#import play.api.Play.current
myDao.whatever()
This works for both Java and Scala projects.
You can see this in practice here:
Access point
Template
On a side note, I would consider if you really want to be doing data access in your template layer.
I have created some extensions in saml metadata. I'm trying to unmarshall the xml using opensaml2. I have created the interface, implementation class, builder, marshaller and unmarshaller of the extension. Then I registered the object providers using Configuration.registerObjectProvider
Configuration.registerObjectProvider(RequestedAudiences.TYPE_NAME, new RequestedAudiencesBuilder(), new RequestedAudiencesMarshaller(), new RequestedAudiencesUnmarshaller());
When I try to get the extensions using the bellow code segment
List<XMLObject> extensions = spssoDescriptor.getExtensions().getUnknownXMLObjects();
It returns objects of the type
org.opensaml.xml.schema.impl.XSAnyImpl
So now I can't read any value from the object. I want to get an object of the actual extension implementation class I have created.
Can anyone suggest what I am doing wrong?
The problem was I have registered the object providers after creating the metadata object. So at the time of creating the metadata object, opensaml does not know how to create the required extension object (RequestedAudiences object). Registering the object providers before creating the metadata object resolved the problem.
You can use below scala code to extract the information.
val dato = descriptor.getExtensions().getUnknownXMLObjects.get(0).asInstanceOf[XSAny]
println(dato.getTextContent)
Does anyone knows how to get all tags values using Fo-Dicom?
I'm trying to display all tags in a window at once but I can't find a method to traverse through every tag!
Thanks,
To traverse a DICOM dataset in fo-dicom, there is an interface IDicomDatasetWalker and a helper class DicomDatasetWalker, both defined in this source file. You should create your custom dataset walker by implementing the IDicomDatasetWalker interface.
A good starter example of such an implementation is given in the DICOM Dump application, as a private class inside the MainForm class.
I am trying to serialize a object in GWT using SerializationFactory, but I am not able to get it working. Here is the sample code of my POC:
import com.google.gwt.user.client.rpc.SerializationException;
import com.google.gwt.user.client.rpc.SerializationStreamFactory;
import com.google.gwt.user.client.rpc.SerializationStreamReader;
import com.google.gwt.user.client.rpc.SerializationStreamWriter;
...........
Some code here....
.........
......
SerializationStreamFactory factory = (SerializationStreamFactory) GWT.create(MyClass.class);
SerializationStreamWriter writer = factory.createStreamWriter();
try {
writer.writeObject(new MyClass("anirudh"));
String value = writer.toString();
SerializationStreamReader reader = factory.createStreamReader(value);
MyClass myObj = (MyClass) reader.readObject();
System.out.println(myObj.getName());
} catch (SerializationException e) {
e.printStackTrace();
}
It gave me the following exception
Caused by: java.lang.RuntimeException: Deferred binding failed for 'com.anirudh..client.MyClass' (did you forget to inherit a required module?)
also in my code the class whose object I am trying to serialize implements IsSerializable
MyClass implements IsSerializable
I don't want to use GWT Auto-Bean framework because it does not fit my use case. Also I am not using GWT-RPC framework and right now I am quite adamant about using SerializationStreamFactory :D because I seriously want to know how this thing works.
Can anyone share a working example of SerializationStreamFactory or help me out pointing any mistake(s) I did.
Thanks in advance
SerializationStreamFactory factory = (SerializationStreamFactory) GWT.create(MyClass.class);
What are you expecting this line to do? GWT will attempt to find a replace-with or generate-with rule that matches this class (either when-type-assignable or when-type-is), or failing that will attempt to invoke a zero-arg constructor on MyClass, effectively new MyClass(). Is this what you are expecting?
The selected exception you've pasted suggests that MyClass may not be on the source path that GWT has been given to compile from, but the full error log will provide more information.
It looks as though you are trying to mimic the generated RPC code, where a *Async rpc interface would be implemented by code that extends from com.google.gwt.user.client.rpc.impl.RemoteServiceProxy (which implements SerializationStreamFactory). That base implementation is extended further to initialize several fields such as the com.google.gwt.user.client.rpc.impl.Serializer instance, actually responsible for serializing and deserializing object streams.
Serializers are created (by default) from the base class of com.google.gwt.user.client.rpc.impl.SerializerBase, through the rebind class com.google.gwt.user.rebind.rpc.TypeSerializerCreator. If you've build your own generator for MyClass, you should be kicking this off to get the work done as ProxyCreator already should be doing.
Remember when building your own serialization/deserialization mechanism that you need to decide which types can be marshalled within this system - if you open it to all types, then you will need to generate FieldSerializer types for all possible objects on the source path. This will greatly expand the size of your compiled code.
If your main goal is learning how this 'magic' works, dig into the generators and associated code that live in the com.google.gwt.user.rebind.rpc package. There are other libraries that leverage these ideas such as the gwt-atmosphere project (see https://github.com/Atmosphere/atmosphere to get started). Also review the generated code that GWT creates when it builds a 'tradition' RPC interface.