build the eclipse project of tucany sdo

tuscany的项目结构比较麻烦，我们用eclipse的不太适应，不过其实还是是比较简单的，方法如下：


1)Download the following:

* JDK 5.0+ (J2SE 1.5.0+)
* Apache Maven (2.0.4+)
* Subversion (1.2+)

2)用svn取到 https://svn.apache.org/repos/asf/incubator/tuscany/java/sdo 的代码

3)在环境变量 path中加入 maven，设置JAVA_HOME

4)在cmd中，转到 <sdo-source-root>/sdo目录，执行 mvn
( attention:保证网络是连通的)

5)在cmd中，转到 <sdo-source-root>/sdo/sdo-api目录，执行 mvn -Peclipse eclipse:eclipse

6)在cmd中，转到 <sdo-source-root>/sdo/impl目录，执行 mvn -Peclipse eclipse:eclipse

7)在cmd中，转到 <sdo-source-root>/sdo/tools目录，执行 mvn -Peclipse eclipse:eclipse

后面的工作就需要按E文的来了，基本上是比较简单常用的eclipse操作，比较的不好说，就copy了：

* Start up eclipse
* Switch to the Java perspective
* Execute "File => Import ... => General => Existing project into workspace
* Click "Browse ..." Navigate to the spec/sdo-api directory and click OK
* Select the sdo-api project and click OK
* After Eclipse has built the project you will see that there are compile errors. This is because Maven has created build dependencies for the project on the contents of your maven repository, but Eclipse doesn't yet know where that repository is. You must create and assign a value to the M2_REPO variable within eclipse to resolve these dependencies
o Right click in the Package Explorer frame on the root of the newly created project and select Properties => Java Build Path
o Click on the "Libraries" tab and select "Add Variable...", "Configure Variables ...", "New ..."
o Set Name to M2_REPO and Click on "Folder..."
o Navigate to the "repository" folder/directory (on Windows this is \Documents and Settings\<user>\.m2\repository, on Linux it is ~/.m2/repository) and click OK
o Accept the request for doing a full rebuild
o Cancel away from the "Configure Variables" dialog
o Click "OK" on the Project Properties Window
o When building is complete the project should now have no errors

Now repeat the same instructions for importing the sdo-impl and sdo-tools projects into the eclipse environment. You aklready have the M2_REPO variable defined now, so these projects should build OK.

At this point you have three separate projects each dependent on binary artifacts in your maven repository. Don't be tricked into thinking that
if you modify the sdo-impl project, that those changes will be picked up by the sdo-tools project. If you want this behaviour then follow these steps

* In the package exlporer pane of the Java perspective, Right Click on Properties and select the libraries tab
* Select the M2_REPO/commonj/sdo-api* library entry and click "remove"
* Select the Projects tab and click "Add..."
* Select the SDO API project and click OK
* If you plan to work in the tools project
o Select the "Order and Export" tab and select the sdo-api project and click OK (this means that the sdo-impl project will expose the interfaces of the sdo-api project, so that you don't have to import them into projects which depend on the sdo-impl project)
o Repeat the above instructions, removing the sdo-api and sdo-impl library dependencies from the tools project, and adding a project dependency for the sdo-tools project on the sdo-impl project