Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>

Use new constant Main.MINIMAL_JRE_VERSION (currently = 17) and
SourceVersion.latest().ordinal() to check, if the minimal JRE version
requirement for AJC is met. If not, then exit with code -1 and error
message "The AspectJ compiler needs at least Java runtime 17".

Relates to #269.

Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>

StringBuffer is a legacy synchronized class. StringBuilder is a direct replacement to StringBuffer which generally have better performance.

Add a bit more type safety and accept some minor refactorings suggested
by the IDE.

Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>

This was required by the Eclipse team as one precondition for the next
release.

Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>

After Ajc usage text output is filtered into its own category
IMessage.USAGE now - see commit @31b2d60b - some tests in module
'org.aspectj.ajdt.core' were failing. I fixed and also improved them a
bit.

Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>

- Usage texts are now printed to stdOut, no longer stdErr.
- 'java ...Main -?' no longer prints usage text twice (once to stdOut
  and then again to stdErr).
- AjdtCommand.inferKind: Usage texts are no longer mis-identified as
  warnings or errors just because they contain substrings "warning" or
  "error". Matching is now more precise, looking for "[warning]" and
  "[error]". But in that case the method would not be called anyway
  because errors and warnings are identified in other ways already. As a
  fall-back, the categories IMessage.ERROR and IMessage.WARNING still
  exist in the method.
- In case of compile errors, no usage message is printed anymore,
  because previously the user had to scroll up a lot in order to see the
  actual messages. This is also in line with ECJ. The same is true for
  warnings, but it was like this in Ajc already.
- AjdtCommand.inferKind: There is a new category IMessage.USAGE
  especially for AspectJ usage texts, which will be identified by string
  matching and then correctly handled (i.e. printed to stdOut, not
  stdErr).
- Usage text printing is no longer done in AspectJ but in the AspectJ
  "shadows" fork of JDT. This helps to get rid of some now obsolete code
  here.

Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>

Signed-off-by: Lars Grefer <eclipse@larsgrefer.de>

Reports any String.indexOf() expressions which can be replaced with a call to the String.contains() method available in Java 5 and newer.

Signed-off-by: Lars Grefer <eclipse@larsgrefer.de>

Reports for loops which iterate over collections or arrays, and can be replaced with an enhanced for loop (i.e. the foreach iteration syntax).

Signed-off-by: Lars Grefer <eclipse@larsgrefer.de>

+ Andy using it to capture 'cant find type' issues.

class and accompanying support).

- Enhanced structure model support.
- *Incremental* structure model support written and tested (currently switched off, see incModelTests.xml)
- -showWeaveInfo compiler option
- existence of a 'runtimetest' surfaced through relationships
- UI can determine if errors/warnings came from DEOWs.
- Code to enable type mungers to remember source locations written (currently switched off)

 	-X should output available -X options

 	Context information in declare warning/error messages

ensure messages are associated with source wherever possible

removed unused imports, local variables, and private methods
(still there, just commented out).

 	out of memory error when compiling