import hibernate-orm source into eclipse juno - eclipse

Question

I want to import hibernate source code into eclipse as a java project. I am new in this field and I'm stuck. I followed the instruction in https://community.jboss.org/wiki/BuildingHibernateORM4x5x. Installed git, downloaded the hibernate-orm. Next I did this ./gradlew eclipse but got the following error.
Downloading http://services.gradle.org/distributions/gradle-1.6-bin.zip
Unzipping /home/souvik/.gradle/wrapper/dists/gradle-1.6-bin/72srdo3a5eb3bic159kar72vok/gradle-1.6-bin.zip to /home/souvik/.gradle/wrapper/dists/gradle-1.6-bin/72srdo3a5eb3bic159kar72vok
Exception in thread "main" java.lang.RuntimeException: java.util.zip.ZipException: error in opening zip file
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:78)
at org.gradle.wrapper.Install.createDist(Install.java:47)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:129)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:48)
Caused by: java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(ZipFile.java:132)
at java.util.zip.ZipFile.<init>(ZipFile.java:169)
at org.gradle.wrapper.Install.unzip(Install.java:160)
at org.gradle.wrapper.Install.access$400(Install.java:29)
at org.gradle.wrapper.Install$1.call(Install.java:70)
at org.gradle.wrapper.Install$1.call(Install.java:47)
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)
... 3 more
So I downloaded the gradle-1.6.bin.zip and copied it into the /home/souvik/.gradle/wrapper/dists/gradle-1.6-bin/72srdo3a5eb3bic159kar72vok/ folder and ran the same command, this time I got this error
Unzipping /home/souvik/.gradle/wrapper/dists/gradle-1.6-bin/72srdo3a5eb3bic159kar72vok/gradle-1.6-bin.zip to /home/souvik/.gradle/wrapper/dists/gradle-1.6-bin/72srdo3a5eb3bic159kar72vok
Set executable permissions for: /home/souvik/.gradle/wrapper/dists/gradle-1.6-bin/72srdo3a5eb3bic159kar72vok/gradle-1.6/bin/gradle
FAILURE: Build failed with an exception.
* What went wrong:
Failed to notify model configuration listener.
> Could not resolve all dependencies for configuration ':runtime'.
> Could not resolve org.apache.ant:ant:1.8.2.
Required by:
:buildSrc:unspecified
> Could not GET 'http://repo1.maven.org/maven2/org/apache/ant/ant/1.8.2/ant-1.8.2.pom'.
> peer not authenticated
> Could not GET 'http://repository.jboss.org/nexus/content/groups/public/org/apache/ant/ant/1.8.2/ant-1.8.2.pom'.
> peer not authenticated
> Could not resolve org.javassist:javassist:3.15.0-GA.
Required by:
:buildSrc:unspecified
> Could not GET 'http://repo1.maven.org/maven2/org/javassist/javassist/3.15.0-GA/javassist-3.15.0-GA.pom'.
> peer not authenticated
> Could not GET 'http://repository.jboss.org/nexus/content/groups/public/org/javassist/javassist/3.15.0-GA/javassist-3.15.0-GA.pom'.
> peer not authenticated
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
Total time: 16.359 secs
I just want to know how do I import the git clone as a java project into my eclipse juno? I have tried to install m2eclipse plugin for eclipse, but it didn't work.
PS: I am in ubuntu 12.04 and I am inside a proxy firewall

Answer 1

You'll have to configure Gradle with your proxy settings, for example
gradlew eclipse -Dhttp.proxyHost=www.somehost.org -Dhttp.proxyPort=8080. For details see Accessing the web via a proxy in the Gradle User Guide.

Answer 2

Solved it, I ran
JAVA_HOME=/usr/lib/jvm/java-7-openjdk-i386
The error is misleading Unsupported major.minor version 51.0 This gives the impression that version 51 (java 7) is not supported. And we should use Java 6.
The error should have been,
Current java version 50 is unsupported, use Java version 7 (51:0 and greater)`