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From Alex Harui <aha...@adobe.com>
Subject Re: [FlexJS] Which java source version? What to do with unreachable code blocks?
Date Mon, 02 Jan 2017 22:33:23 GMT

On 1/2/17, 1:54 PM, "Christofer Dutz" <christofer.dutz@c-ware.de> wrote:

>I am currently going through some issues in the code and stumbled over
>several that need discussion:
>-          The Ant build script claims the source to be Java 1.6, but
>there’s code in there that is marked as “since 1.7” (COMPJSC.java Lines
>349 and 351): What source level are we using? I would vote for 1.7 as we
>are doing new stuff and I don’t see the point in writing that in a no
>longer supported Java version. I would even be ok with 1.8. You couldn’t
>use it with Maven with Java 1.6 anyway because our minimum Maven version
>already requires 1.7.

I don't know much about Java version compatibility, but here's what I

In flex-falcon, the flex-compiler-oem jar plugs in Flash Builder.  Flash
Builder comes bundled with an older version of Eclipse.  Supposedly these
versions of Eclipse and Flash Builder are stuck on Java 1.6?
Flex-compiler-oem calls into the other jars in the flex-falcon/compiler
project, but uses a launcher for running the code in the
flex-falcon/compiler-jx project.  So, could that mean that compiler-jx
could be on a newer Java version?  However, in trying to create the
ability for Flash Builder to build both the SWF and JS versions in one go,
I think the flex-compiler-oem.jar will be calling into jars from
compiler-jx.  So I was told that we need to stay with 1.6, but I have no
idea if that's really true or not.

Now recently, Adobe supposedly found a way to get Flash Builder to run on
Java 7 and 8 on Mac [1].  No idea about Windows. And the process seems a
bit difficult.  Not sure if we could automate it.

IMO, Flash Builder remains important and will be important for at least a
few more years.   But if there is a way to get our code to run in Flash
Builder without being stuck on 1.6, I'm more than happy to move to a newer


>-          I have encountered several code blocks in which if statements
>compare String constants with the “==” operator. In most cases this can’t
>possibly be true … unfortunately there are larger code blocks in there.
>Now I could simply delete the code blocks (they don’t seem to be needed
>at the moment) but I guess they were written for a purpose, so I don’t
>quite feel well with deleting.
>o    org.apache.flex.compiler.internal.codegen.as.ASEmitter Line: 1332
>Line: 173, 251, 252, 346, 385, 389, 393, 405, 409
>o   org.apache.flex.compiler.internal.codegen.js.flexjs.JSFlexJSEmitter
>Line: 475-479
>o   org.apache.flex.compiler.internal.codegen.js.goog.JSGoogDocEmitter
>Line: 115, 119, 204, 205, 435, 442, 505, 506
>o   org.apache.flex.compiler.internal.codegen.js.goog.JSGoogEmitter Line:
>430, 649, 704, 710, 780, 785
>o   org.apache.flex.compiler.internal.codegen.mxml.MXMLEmitter Line: 184
>er: Line 822
>o   ...
>Some of these “==” issues might even be correct if the source is
>initialized with the same constant as which it’s being compared to.

If you are feeling brave, clean these up and see if all tests pass.


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