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https://issues.apache.org/jira/browse/HADOOP-1824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12562547#action_12562547
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Ankur commented on HADOOP-1824:
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Some questions.
1. How is a java.io.InputStream passed and used in native code. The header
file represents it as a jobject which I tried casting to FILE * and reading, it
did not work as expected.
2. Can a native method call return structures that can be converted to java
objects ? If so how ?
Basically I want to be able to return an array of C structure where each
element holds the following information
- The path of the entry
- The number of the entry
- Offset of the entry in the zip file
So that this info can be converted to an array of ZipSplit.
I am new to JNI so things are less than obvious for me, a little help will be
greatly appreciated on JNI.
> want InputFormat for zip files
> ------------------------------
>
> Key: HADOOP-1824
> URL: https://issues.apache.org/jira/browse/HADOOP-1824
> Project: Hadoop Core
> Issue Type: New Feature
> Components: mapred
> Affects Versions: 0.15.2
> Reporter: Doug Cutting
> Attachments: ZipInputFormat_fixed.patch
>
>
> HDFS is inefficient with large numbers of small files. Thus one might pack
> many small files into large, compressed, archives. But, for efficient
> map-reduce operation, it is desireable to be able to split inputs into
> smaller chunks, with one or more small original file per split. The zip
> format, unlike tar, permits enumeration of files in the archive without
> scanning the entire archive. Thus a zip InputFormat could efficiently permit
> splitting large archives into splits that contain one or more archived files.
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