This application is meant to be used with vim-cpid. It runs in the background and:
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Accepts requests to index java type names.
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from JARs on a classpath.
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from JARs in a directory.
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from a JDK JImage file.
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Answers queries regarding packages containing a given type name.
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Answers queries to enumerate the type names found in a given package.
The wire protocol is that of vim’s channel wrapper. That is, each message is a JSON array with a message sequence number followed by a payload value. See :h channel-open for more info.