Sharepoint REST API call

Guys, I am sure this snippet will help you a lot when you do sharepoint REST integration to read files

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Test Web Service With SOAP UI

Hello Friends,

I know many of you will be familiar with SOAP UI tool which is available to test SOAP as well as REST web services.

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Escape HTML using JSTL

Hello Friends,

If you are using JSTL to display HTML data in your application then you can escape HTML 2 ways in JSTL:

1) Using <c:out> tag

<c:out value="${specialCharString or HTML}" escapeXml="true"/>

2) Using EL Function

${fn:escapeXml("<i> This is jignesh vachhani")} 

Hope this will be useful somewhere.

If you want to use Liferay API then you can simply use

HTMLUtil.escape(String HTMLString)

Show/Display HTML tag in jsp

${fn:escapeXml(fn:replace(fn:replace(fn:replace("<div><p>This is jignesh testing</p></div>",'"','&quot;'),'<','&lt;'),'>','&gt;'))}

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Find Duplicate Records MySQL Query

Hi All

I know that this is not related Liferay but i came across this useful thing during my development where you can find duplicate record from table and can delete if you need.

SELECT tablename.name FROM tablename
INNER JOIN (SELECT name FROM tablename
GROUP BY name HAVING count(name) > 1) dup_record ON tablename.name = dup_record.name

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Read Files From Folder

Hi All,

You can use below code to read files from specific folders :

import java.io.File;

public class Test {

    /**

     * @param args

     */  

public static void listFilesForFolder(File folder) {

        

        for (File fileEntry : folder.listFiles()) {

            if (fileEntry.isDirectory()) {

                listFilesForFolder(fileEntry);

            } else {

                

                System.out.println(fileEntry.getName());

            }

        }

        System.out.println("Total :" +folder.listFiles().length);

    }

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Malicious code vulnerability - Java Programming

Malicious code vulnerability - Field is a mutable array

Malicious code vulnerability - Field is a mutable Hashtable

Malicious code vulnerability - Field isn't final and can't be protected from malicious code

Malicious code vulnerability - Field isn't final but should be

Malicious code vulnerability - Field should be both final and package protected

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Performance - Java Programming

Performance - Could be refactored into a named static inner class

Performance - Could be refactored into a static inner class

Performance - Explicit garbage collection; extremely dubious except in benchmarking code

Performance - Huge string constants is duplicated across multiple class files

Performance - Inefficient use of keySet iterator instead of entrySet iterator

Performance - Maps and sets of URLs can be performance hogs

Performance - Method allocates a boxed primitive just to call toString

Performance - Method allocates an object, only to get the class object

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Avoid - Java Programming

Avoid Array Loops

Avoid Assert As Identifier

Avoid Calling Finalize

Avoid Catching NPE

Avoid Catching Throwable

Avoid Decimal Literals In Big Decimal Constructor

Avoid Duplicate Literals

Avoid Enum As Identifier

Avoid Instanceof Checks In Catch Clause

Avoid Print Stack Trace

Avoid Rethrowing Exception

Avoid Throwing Null Pointer Exception

Avoid Throwing Raw Exception Types

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Bad practice - Java Programming

Bad practice - Abstract class defines covariant compareTo() method

Bad practice - Abstract class defines covariant equals() method

Bad practice - Certain swing methods needs to be invoked in Swing thread

Bad practice - Check for sign of bitwise operation

Bad practice - Class defines clone() but doesn't implement Cloneable

Bad practice - Class defines compareTo(...) and uses Object.equals()

Bad practice - Class defines equals() and uses Object.hashCode()

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OOP Principles For The Java Designer

Here are some useful information which should be familiar with all the java programmers/designers :

1. DRY

DRY stands for Don’t Repeat Yourself, which is pretty self explanatory. This means that you shouldn’t be duplicating your code in a program. If a code fragment is appearing in two places, then you would do well to turn it into a method instead of writing the entire fragment again. Lack of duplication helps in easy maintenance of the code.

2. Encapsulation

Whether your project gets bought over or whether you work on it yourself, your code will always change. So, it is good to encapsulate the part of the code that you think will be changed. This makes you code easy to maintain and test.

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JVM Structure & YourKit Tool

As a java programmer, we should have at least basic knowledge of JVM and how it stores values.

The JVM memory consists of the following segments,

• Heap Memory :  Storage for Java objects
• Non-Heap Memory : Used by Java to store loaded classes and other meta-data
• Other :  JVM internal structures, loaded profiler agent code and data, etc.

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Custom Comparator in Java

import java.util.Arrays;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;



/**

 * @author Jignesh Vachhani

 *

 */

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See lucene Index

Hi

I have found out the way where you can actually look at the index files and figure out what are fields in index of Lucene.  

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oData

oData is a protocol based on AtomPub and REST.OData builds on core protocols like HTTP and commonly accepted methodologies like REST. It’s designed to define the standard way of communication to a web service.

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HashMap sorting

I know this is not related to Liferay... But it can be useful to you guys for java programming...
As we know that hash map doesnt allow duplicate value with the same key name... But if you want to sort the map by values instead of key, below is the code which can be useful...

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Detect word and convert in URL

Guys,

I know this is not related to Liferay but might be useful in somewhere,
where you need to detect some words and convert it into URL then it would be helpful.

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Mail API

Hello Java Folks,

We are using mail sending functionlaity in most of the web applications.
So have a look on below java class which can help you to send the mail using JAVA API.

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Inter portlet communication (IPC)

Hello Everyone,
Here is the flow of IPC

Here below are the steps to follow for IPC :

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Convert List to JsonArray

Might be you won't be aware that you can't use existing portal *JsonSerializer.java class in Liferay plugin portlets. So if you want to get JsonArray response of existing liferay service then you can use below code :

import net.sf.json.JSONArray;

List myList = UserLocalserviceUtil.getUsers();
JSONArray jsonArray = JSONArray.fromObject(MyList);

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WSRP

WSRP : Most useful world if you are using portlet standards.

so you wanna get introduce with WSRP ???? Just follow me and my this link .

This article represents vary nice details of WSRP.

If it really helpful ? just say Thanks to me for finding this article for you :)

Cheers !!!!!!!!!!

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