Slashdev Support Forum » Forum: Java Preprocessor

Slashdev Support Forum » Forum: Java Preprocessor - Recent Posts http://forum.slashdev.ca/forum/3 A place to ask questions about projects and posts on the Slashdev blog. en-US Sat, 04 Feb 2012 23:56:01 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://forum.slashdev.ca/search.php jiggak on "How to invoke the preprocessor" http://forum.slashdev.ca/topic/9#post-40 Wed, 23 Mar 2011 19:02:40 +0000 jiggak 40@http://forum.slashdev.ca/ If you surround the literal "xxx" with double quotes string comparison is (*should*) be performed. Also to overcome the issue with a property being undefined you don't even need to give it a value in Ant. Something like ACTIVE_PROJECT= would suffice. There should be section in the <a href="http://git.slashdev.ca/javapp/plain/README">README</a> regarding the types of comparisons available and the syntax for the literal values inside expressions. abell@safenet-inc.com on "How to invoke the preprocessor" http://forum.slashdev.ca/topic/9#post-39 Wed, 23 Mar 2011 15:13:32 +0000 abell@safenet-inc.com 39@http://forum.slashdev.ca/ Great, Thanks I resolved the PROJ1 and PROJ2 by defining a seperate control property ACTIVE_PROJECT. I also discovered that using the #if ${prop} == xxx, that xxx must be a numeric value. if you make changes in the future, a string based comparison would be useful too. ACTIVE_PROJECT=MyProject vs. ACTIVE_PROJECT=1234 Thanks for the help, I have a working ant script and controls now jiggak on "How to invoke the preprocessor" http://forum.slashdev.ca/topic/9#post-38 Tue, 22 Mar 2011 16:30:30 +0000 jiggak 38@http://forum.slashdev.ca/ The behavior with PROJ1 and PROJ2 properties is most certainly a bug (or more appropriately something I didn't consider closely enough while developing javapp). Regarding the property changes in the build.xml file not causing a re-compile, yes I think this is really better left up to the ant script itself. For example use the <uptodate> task to check if build related files are newer than pre-processor output. <pre><code><target name="clean" if="buildxml_is_newer"> <delete dir="staging" /> </target> <target name="preprocess" depends="check-build-files,clean"> ... </target> <target name="check-build-files"> <uptodate srcfile="build.xml" property="buildxml_is_newer"> <srcfiles dir="staging" includes="**/*" /> </uptodate> </target></code></pre> abell@safenet-inc.com on "How to invoke the preprocessor" http://forum.slashdev.ca/topic/9#post-37 Mon, 21 Mar 2011 08:36:57 +0000 abell@safenet-inc.com 37@http://forum.slashdev.ca/ I found another oddity - perhaps you could comment on. If I change the property definitions in ant's build.xml file, this does not cause a new preprocess to occur, I believe because the src files did not change. That it turn does not cause a recompile of the files. The result is the build does not match the required definitions. If I clean and and run again, I get what I expected. Is there a way to force the preprocess to occurs based on the change of the build.xml file? - This may be more of an ant question than javapp question. Thanks, Adam abell@safenet-inc.com on "How to invoke the preprocessor" http://forum.slashdev.ca/topic/9#post-36 Mon, 21 Mar 2011 08:04:00 +0000 abell@safenet-inc.com 36@http://forum.slashdev.ca/ Success - the fundamental problem was the //#ifdef, this does not seemed to be supported. I changed it to //#if defined(PROJ1) and that works This was an assumption on my part - I'll read the syntax doc a little closer. One oddity: If I defined PROJ1 and PROJ2 in build.xml - the preprocess works, PROJ1 is printed out If I defined ONLY PROJ1 - it fails, stating: property 'PROJ2' not defined If I ONLY define PROJ2 - it works, PROJ2 is printed out Am I missing something here - It seems the code would be VERY dependant on how the "if defined() is used/ordered and how the properties are declared. If I defined only PROJ1, I would expect the PROJ2 to be preprocessed out and no error to be thrown? Thanks for the help. I appreciate it. Adam jiggak on "How to invoke the preprocessor" http://forum.slashdev.ca/topic/9#post-35 Fri, 18 Mar 2011 12:55:31 +0000 jiggak 35@http://forum.slashdev.ca/ Strange. I don't seem to have the same problem in my tests. I did however get an error due to the PROJ2 property being undefined. Here is my test files: # build.xml <pre><code><project default="preprocess"> <taskdef resource="javapp-defs.xml" /> <target name="preprocess"> <javapp destdir="staging" prefix="//#"> <fileset dir="src" includes="**/*.java" /> <property name="PROJ1" value="SC650" /> <property name="PROJ2" value="SC750" /> </javapp> </target> </project></code></pre> # HelloWorld.java <pre><code>public class HelloWorld { public static void main(String args[]) { //#if defined(PROJ1) System.out.println("Hello Project 1: ${PROJ1}"); //#else System.out.println("Hello Project 2: ${PROJ2}"); //#endif } }</code></pre> abell@safenet-inc.com on "How to invoke the preprocessor" http://forum.slashdev.ca/topic/9#post-34 Fri, 18 Mar 2011 12:38:53 +0000 abell@safenet-inc.com 34@http://forum.slashdev.ca/ I also added this to supress an ant warning: includeantruntime="false" and the dependancy for preprocess <target name="compile" depends="preprocess"> <mkdir dir="${classes.dir}"/> <javac srcdir="${src.dir}" destdir="${classes.dir}" includeantruntime="false"/> </target> abell@safenet-inc.com on "How to invoke the preprocessor" http://forum.slashdev.ca/topic/9#post-33 Fri, 18 Mar 2011 12:36:20 +0000 abell@safenet-inc.com 33@http://forum.slashdev.ca/ Here you go public class HelloWorld { public static void main(String args[]) { //#if defined(PROJ1) <<fails right here System.out.println("Hello Project 1: ${PROJ1}"); //#else System.out.println("Hello Project 2: ${PROJ2}"); //#endif } } jiggak on "How to invoke the preprocessor" http://forum.slashdev.ca/topic/9#post-32 Fri, 18 Mar 2011 12:24:24 +0000 jiggak 32@http://forum.slashdev.ca/ Can you post your .java file as well? abell@safenet-inc.com on "How to invoke the preprocessor" http://forum.slashdev.ca/topic/9#post-31 Fri, 18 Mar 2011 08:50:05 +0000 abell@safenet-inc.com 31@http://forum.slashdev.ca/ OK, I built a simple ant build.xml file and inserted the referenced code from the slashdev website (At end of this post), but Get an error - Not sure what I am missing here. I can call any just fine and compile java directly - just failing to successfully preprocess Any input would be greatly appreciated. Adam preprocess: BUILD FAILED C:\FOUO_SC650\java\build.xml:21: 'HelloWorld.java', line 5, char 6: Token not recognised in state 'ifcond' complete build.xml file <project name="HelloWorld" basedir="." default="main"> <property name="src.dir" value="src"/> <property name="build.dir" value="build"/> <property name="classes.dir" value="${build.dir}/classes"/> <property name="jar.dir" value="${build.dir}/jar"/> <property name="main-class" value="HelloWorld"/> <target name="clean"> <delete dir="${build.dir}"/> </target> <taskdef resource="javapp-defs.xml" /> <property name="os_version" value="4.2" /> <target name="preprocess"> <javapp destdir="build\staging" prefix="//#"> <fileset dir="src" includes="**/*.java" /> <property name="PROJ1" value="SC650" /> </javapp> </target> <target name="compile"> <mkdir dir="${classes.dir}"/> <javac srcdir="${src.dir}" destdir="${classes.dir}"/> </target> <target name="jar" depends="compile"> <mkdir dir="${jar.dir}"/> <jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${classes.dir}"> <manifest> <attribute name="Main-Class" value="${main-class}"/> </manifest> </jar> </target> <target name="run" depends="jar"> <java jar="${jar.dir}/${ant.project.name}.jar" fork="true"/> </target> <target name="clean-build" depends="clean,jar"/> <target name="main" depends="clean,run"/> </project> <project name="HelloWorld" basedir="." default="main"> <property name="src.dir" value="src"/> <property name="build.dir" value="build"/> <property name="classes.dir" value="${build.dir}/classes"/> <property name="jar.dir" value="${build.dir}/jar"/> <property name="main-class" value="HelloWorld"/> <target name="clean"> <delete dir="${build.dir}"/> </target> <taskdef resource="javapp-defs.xml" /> <property name="os_version" value="4.2" /> <target name="preprocess"> <javapp destdir="build\staging" prefix="//#"> <fileset dir="src" includes="**/*.java" /> <property name="PROJ1" value="SC650" /> </javapp> </target> <target name="compile"> <mkdir dir="${classes.dir}"/> <javac srcdir="${src.dir}" destdir="${classes.dir}"/> </target> <target name="jar" depends="compile"> <mkdir dir="${jar.dir}"/> <jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${classes.dir}"> <manifest> <attribute name="Main-Class" value="${main-class}"/> </manifest> </jar> </target> <target name="run" depends="jar"> <java jar="${jar.dir}/${ant.project.name}.jar" fork="true"/> </target> <target name="clean-build" depends="clean,jar"/> <target name="main" depends="clean,run"/> </project> jiggak on "How to invoke the preprocessor" http://forum.slashdev.ca/topic/9#post-30 Thu, 17 Mar 2011 14:05:55 +0000 jiggak 30@http://forum.slashdev.ca/ I'm afraid there is currently no way to invoke this from the command line without using Ant. You can find some sample Ant scripts <a href="http://www.slashdev.ca/javapp/">here</a>. abell@safenet-inc.com on "How to invoke the preprocessor" http://forum.slashdev.ca/topic/9#post-29 Thu, 17 Mar 2011 09:51:34 +0000 abell@safenet-inc.com 29@http://forum.slashdev.ca/ I think I just need how to load the xml definition files that has the preprocessing info and defines and the syntax for the input and output java files abell@safenet-inc.com on "How to invoke the preprocessor" http://forum.slashdev.ca/topic/9#post-28 Thu, 17 Mar 2011 08:53:15 +0000 abell@safenet-inc.com 28@http://forum.slashdev.ca/ I downloaded then javapp.zip file, extracted and have the jar. I also have a verysimple javac HelloWorls.java ready to test. I can not find exactly how to use this wonderful tool - I am not using ANT at the moment. Can anyone point me to a list of instructions on what to do to invoke the preprocessor from the command line? Thanks, Adam jiggak on "Cannot get javaPP to work" http://forum.slashdev.ca/topic/6#post-18 Mon, 28 Jun 2010 20:22:31 +0000 jiggak 18@http://forum.slashdev.ca/ Good to hear you got it working. Currently there isn't any sort of support for comments in the pre-processor grammar or expressions. Reza on "Cannot get javaPP to work" http://forum.slashdev.ca/topic/6#post-17 Mon, 28 Jun 2010 19:10:44 +0000 Reza 17@http://forum.slashdev.ca/ JDK 1.6 works. A minor thing I noticed (that maybe you are already aware of): //#if ${USEROBJ_ASM_ELEMENT_SIZE} == 4 System.err.println("4 "); //#else System.err.println("no 4 "); //#endif is good. //#if ${USEROBJ_ASM_ELEMENT_SIZE} == 4 /* test */ System.err.println("4 "); //#else System.err.println("no 4 "); //#endif gives this error: C:\Projects\Application\v1.0\System>ant preprocess Buildfile: C:\Projects\Application\v1.0\System\build.xml preprocess: BUILD FAILED C:\Projects\Application\v1.0\System\build.xml:95: 'CUserobj.java', line 685, char 44: Token not recognised in state 'ifcond' Total time: 2 seconds C:\Projects\Application\v1.0\System> jiggak on "Cannot get javaPP to work" http://forum.slashdev.ca/topic/6#post-16 Thu, 24 Jun 2010 22:36:17 +0000 jiggak 16@http://forum.slashdev.ca/ You don't need to install jython (it's bundled into javapp.jar) but it also "shouldn't" hurt if it is installed. I might have compiled javapp with JDK 1.6 (I don't remember). Is it possible for you to upgrade the java 1.6 and try again? If not, let me know. I should be able to recompile javapp against java 1.5. Reza on "Cannot get javaPP to work" http://forum.slashdev.ca/topic/6#post-15 Thu, 24 Jun 2010 12:51:09 +0000 Reza 15@http://forum.slashdev.ca/ I upgraded my ant to version 1.8.1 from binary distribution and added javapp.jar (extracted from javapp-0.4.zip) under /lib directory. I installed jython using jython_installer-2.5.0.jar under my jdk1.5.0_05. I added the following lines to my build.xml: <?xml version="1.0" standalone="yes"?> <project name="Application" default="compile" basedir="."> ...  <taskdef resource="javapp-defs.xml" /> ... <target name="preprocess"> <javapp destdir="staging" prefix="//#"> <fileset dir="src" includes="**/*.java" /> </javapp> </target> ... I typed ant preprocess and received the following error message: BUILD FAILED C:\Projects\R&D\Sole\Application\v1.0\System\build.xml:5: java.lang.UnsupportedC lassVersionError: Bad version number in .class file at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12 4) at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) at java.net.URLClassLoader.access$100(URLClassLoader.java:56) at java.net.URLClassLoader$1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at org.apache.tools.ant.AntClassLoader.findBaseClass(AntClassLoader.java :1383) at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:106 0) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:242) at org.apache.tools.ant.taskdefs.Definer.addDefinition(Definer.java:594) at org.apache.tools.ant.taskdefs.Definer.execute(Definer.java:239) at org.apache.tools.ant.taskdefs.Antlib.execute(Antlib.java:177) at org.apache.tools.ant.taskdefs.Definer.loadAntlib(Definer.java:443) at org.apache.tools.ant.taskdefs.Definer.execute(Definer.java:292) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.jav a:106) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.Target.execute(Target.java:390) at org.apache.tools.ant.helper.ProjectHelper2.parse(ProjectHelper2.java: 179) at org.apache.tools.ant.ProjectHelper.configureProject(ProjectHelper.jav a:82) at org.apache.tools.ant.Main.runBuild(Main.java:786) at org.apache.tools.ant.Main.startAnt(Main.java:218) at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280) at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109) Total time: 0 seconds Any idea? Thanks, Reza.