Changes

<big><big> JSON_Adapter</big></big>{{NexJ_Express IndexAdmon/obsolete}} [[Category: NexJ_Past_Projects]][[Category: NexJ Express JSON Adapter]] [[Category: NexJ Express Development]][[Category: NexJ Express]]

Develope Develop an adapter to expose NexJ Express Server objects using JSON<br/>- [https://docs.google.com/document/d/1z8KfOa7sLD6l3g-1djnm6eU4ErfXDcqRX5v7OR0RJho/edit?hl=en&authkey=CJS3xcQP Final Project Proposal] ===Contributors===* [[User:Gbatumbya|Grace Batumbya]] 

<big><big>'''Phase 10: Code Review 5Project Completed''' <br/big></big>Ongoing...

* Proposal proposal for review, make changes as by NexJ until approved<br/>- [https://docs.google.com/document/d/1z8KfOa7sLD6l3g-1djnm6eU4ErfXDcqRX5v7OR0RJho/edit?hl=en&authkey=CJS3xcQP Final Project Proposal]

** Remove visReferencable<code>isReferencable()</code>, do lookup in TransferObject Marshaller

===Phase 8: Apply Changes per Code Review 3(Done)===*JSONWriter.java:**Can a <code>StringBuilder</code> be used instead of a <code>StringBuffer</code>? Maybe the same change can be done in <code>TextMarshaller</code> as well? The member field can still be called <code>m_buffer</code>. Using <code>StringBuilder</code> instead of <code>StringBuffer</code> avoids the synchronization overhead.**writeString: remove the unnecessary conversion to a character array; the length can be accessed via <code>String.length()</code>.*JSONMarshaller.java**Can you fill in the comment for parameter <code>"writer"</code> on method <code>"marshal"</code> of interface <code>Marshaller</code>? It is currently marked with <code>TODO</code>.**You can use the string id <code>err.rpc.mshType</code> instead of <code>err.rpc.json.mshType</code>**Can you define the <code>Timestamp</code> marshaller first, then the <code>java.util.Date</code> marshaller? Vassiliy wanted the default framework type’s marshaller first, followed by its synonyms.*JSONParser.java**Putting parts of the error message in the error arguments Object array that is passed to <code>fail()</code> isn’t localizable. The error message should be part of the value of the string id. String ids are stored in the <code>*.strings files</code>. For string ids used by Java code, the .strings files are in <code>core/src/nexj/core/meta/sys</code>. You need to ensure that there is an entry in this file for each id that you use. These are then translated into French (and possibly other languages) by people who specialize in translating software interfaces. The only things passed in the error arguments Object array should be data.**There should be a blank line before <code>break</code> and <code>return</code> statements.*JSONUnmarshaller.java**For the <code>castTo*</code> methods, can you rename them to <code>get*</code> and have them take a <code>String sKey</code> argument, which is the key to lookup in <code>m_valueMap</code>? This will more closely follow what Vassiliy intended when he said “Rather than directly type casting values retrieved from json map, you can have unmsh accessor methods for the common types, which can also do error checking, so that one does not get a generic type cast error and wonder what went wrong and where.”**<code>parseObject()</code>: I don’t think you need separate branches of code for handling the first key in the iterator and subsequent keys. Also, for iteration, prefer <code>for()</code> to <code>while()</code>.*JSONUnmarshallerException.java**The overload with <code>(String sExpected, Class actual)</code> isn’t localizable. Remove this overload and use the <code>(String sErrCode, Object[] argArray)</code> constructor. In <code>JSONUnmarshaller get*</code> methods, pass an <code>Object[]</code> of length two for the <code>argArray</code>. Ensure that both are strings.**Please add a string for err.rpc.json.unmsh.CastException to en.strings in core/src/nexj/core/meta/sys. The various parts of the string id should all start with lowercase letters, e.g. CastException à castException. Use a meaningful name instead of “CastException”—CastException is what it is, not what the error is.*JSONTests.java**<code>testSerializeException</code> doesn’t need to initialize the <code>marshaller</code> and <code>unmarshaller</code>: they are initialized already by <code>setUp()</code>, which is run before each <code>test*()</code> method.**please remove the parts of tests that are duplicated. For example, in <code>testServerObjects()</code> you test the serialization of a Symbol called <code>sym</code>, a <code>PrivilegeSet</code> of “480000”, and a <code>PCodeFunction</code> with <code>code</code> 0, 1, 2. But these have already been tested by the <code>testSerializeRequestCheckJSON</code> which uses the m_request object initialized by the superclass.**Use <code>Primitive.createInteger</code>, <code>Primitive.createLong</code>, etc. instead of <code>new Integer(…), new Long(…)</code>, etc. where possible. ===Phase 9: Code Review 4 (Done) ===* Send patch to NexJ for review ===Phase 10: Apply Changes per Code Review 4 (Done) ===*The <code>m_tokenValue</code> used in some of the error messages won’t always be populated. For example, in <code>parseArray()</code>, <code>m_tokenValue</code> is used, but it will only be valid if the current token is <code>TOKEN_ATOM</code>. *The <code>boolean.invalidToken</code> error message can be removed and you can use just <code>err.parse.unexpectedToken</code> instead, as one doesn’t know for certain that the input is a <code>Boolean</code>. Same for <code>null.invalidToken</code> and <code>number.invalidToken</code>. * <code>parseObject()</code>: the <code>if (sKey == null)</code> check can never succeed, because <code>instanceof</code> should return false if its argument is <code>null</code>. ===Phase 11: Code Review 5 (Done) ===* Send code for review