w/system: a resource failed to call end(close).

[liuyibox]

Although this may not happen on desktop or laptop machine, directly using metamaplite in android produces w/system: a resource failed to call end(close). This error is basically caused by un-released fileinputstream or fileoutputstream. On android, the newly opened fileinputstream or fileoutputstream needs to be closed explicitly. In particular, this error comes from 2 sides when using metamaplite on android:

1. from metamaplite:
   For example, in Example.java and Example2.java, the newly created FileReader is not closed after usage, so they need to be explicitly closed as shown below:

            FileReader fr = new FileReader("./config/metamaplite.properties");
            myProperties.load(fr);
            ...
            fr.close();

2. from 3rd party library:
   For example, in org.apache.opennlp, opennlp/tools/util/model/BaseModel.java(loadModel) and opennlp/tools/util/model/BaseModel.java(finishLoadingArtifacts), ZipInputStream zip is not explicitly closed. This can be achieved by the following:

• In loadModel method:

            final ZipInputStream zip = new ZipInputStream(in);
            ...
            zip.close()

• In finishLoadingArtifacts

            ZipInputStream zip = new ZipInputStream((InputStream)in);
            ...
            zip.close()

If more attention is paied, here I replaced the final ZipInputStream zip = new ZipInputStream(in); with ZipInputStream zip = new ZipInputStream((InputStream)in);. Yes, only in this way I can re-compile the the opennlp source code into a jar file in maven. If there is an alternative, please let me know.