Examples of org.geotools.data.shapefile.files.ShpFiles.tryAcquireRead()

org.geotools.data.shapefile.files.ShpFiles.tryAcquireRead()

Tries to acquire a URL for read only purposes. Returns null if the acquire failed or if the file does not.

It is recommended that get*Stream or get*Channel methods are used when reading or writing to the file is desired.

@see #getInputStream(ShpFileType,FileReader) @see #getReadChannel(ShpFileType,FileReader) @see #getWriteChannel(ShpFileType,FileReader) @param type the type of the file desired. @param requestor the object that is requesting the URL. The same object must release the lockand is also used for debugging. @return A result object containing the URL or the reason for the failure.

            }


        };


        // same thread should work
        Result<URL, State> result1 = shpFiles.tryAcquireRead(SHX, testWriter);
        assertEquals("http://somefile.com/shp.shx", result1.value
                .toExternalForm());
        assertEquals(2, shpFiles.numberOfLocks());


        // same thread should work

        assertEquals("http://somefile.com/shp.shx", result1.value
                .toExternalForm());
        assertEquals(2, shpFiles.numberOfLocks());


        // same thread should work
        Result<URL, State> result2 = shpFiles.tryAcquireRead(DBF, this);
        assertEquals("http://somefile.com/shp.dbf", result2.value
                .toExternalForm());
        assertEquals(3, shpFiles.numberOfLocks());


        shpFiles.unlockRead(result2.value, this);

            }


        };


        // same thread should work
        Result<URL, State> result1 = shpFiles.tryAcquireRead(SHX, testWriter);
        assertEquals("http://somefile.com/shp.shx", result1.value
                .toExternalForm());
        assertEquals(2, shpFiles.numberOfLocks());


        try {

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