| Get classpath variables programmatically [message #252055] |
Mon, 17 March 2008 12:42  |
Eclipse User |
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How do it get classpath variables programmatically? I defined a new
classpath variable MY_HOME to point to a directory and tried to use the
following code to access it in my eclipse plug-in:
IPath bootstrapPath = new Path("MY_HOME").append("jlibs.jar");
IRuntimeClasspathEntry bootstrapEntry =
JavaRuntime.newVariableRuntimeClasspathEntry(bootstrapPath);
bootstrapEntry.setClasspathProperty(IRuntimeClasspathEntry.U SER_CLASSES);
Doen't seem to work.. can anyone help me ?
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| Re: Get classpath variables programmatically [message #252104 is a reply to message #252055] |
Wed, 19 March 2008 10:30  |
| Eclipse User |
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Ok, I found the answer myself..
I could use JavaCore.getClasspathVariable(String variablename). But i
cannot use it in a headless plug-in.
The specific scenario I had in mind was to use the path pointed to by a
classpath variable in a launch configuration. I was trying to build a launch
configuration programmatically. For that purpose, there is a simple method
call in the JavaRuntime class which acheives this:
Here's an example:
IRuntimeClasspathEntry bootstrapEntry =
JavaRuntime.newVariableRuntimeClasspathEntry(new Path("JRE_LIB"));
And, if you look at the lauch configuration, you can add entries to the
bootstrap classpath or the user-defined classes. To add this environment
variable entry to the bootstrap classpath, you just need to say:
bootstrapEntry.setClasspathProperty(IRuntimeClasspathEntry.B OOTSTRAP_CLASSES);
OR if you need to add it to the user-defined entries, you would say:
IRuntimeClasspathEntry userEntry =
JavaRuntime.newVariableRuntimeClasspathEntry(new Path("JRE_LIB"));
userEntry.setClasspathProperty(IRuntimeClasspathEntry.USER_C LASSES);
Or if you want to make another entry, and still add it to classpath , but
not display it in the "classpath" tab al all (kinda hiding it), you would
say:
IRuntimeClasspathEntry hiddenOrDefaultEntry =
JavaRuntime.newVariableRuntimeClasspathEntry(new Path("JRE_LIB"));
hiddenOrDefaultEntry
..setClasspathProperty(IRuntimeClasspathEntry.STANDARD_CLASS ES);
.. This would add the entry to the classpath, but the entry would not be
displayed in the launch configuration's classpath tab.
Another example: If you wanted to add an external jar file to the
user-defined classes section of the classpath, you would do that with the
following couple of lines:
IRuntimeClasspathEntry myJarEntry =JavaRuntime.
newArchiveRuntimeClasspathEntry(new Path("/usr/lib/myjarfile.jar"));
myJarEntry.setClasspathProperty(IRuntimeClasspathEntry.USER_ CLASSES);
Hope this helps anyone who tries to build a launch config programmatically.
It aslo helps to read the article at:
http://www.eclipse.org/articles/Article-Java-launch/launchin g-java.html
"Arun Sudhir" <arunsudhir@gmail.com> wrote in message
news:frm71m$ug0$1@build.eclipse.org...
> How do it get classpath variables programmatically? I defined a new
> classpath variable MY_HOME to point to a directory and tried to use the
> following code to access it in my eclipse plug-in:
>
> IPath bootstrapPath = new Path("MY_HOME").append("jlibs.jar");
> IRuntimeClasspathEntry bootstrapEntry =
> JavaRuntime.newVariableRuntimeClasspathEntry(bootstrapPath);
> bootstrapEntry.setClasspathProperty(IRuntimeClasspathEntry.U SER_CLASSES);
> Doen't seem to work.. can anyone help me ?
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