Examples of org.apache.derby.impl.io.vfmem.DataStore

org.apache.derby.impl.io.vfmem.DataStore
A virtual data store, keeping track of all the virtual files existing and offering a set of high-level operations on virtual files.
A newly created data store doesn't contain a single existing directory.

        }
        assertEquals(4, count);
    }


    public void testGetParentAbsolute() {
        DataStore store = getStore();
        VirtualFile vFile = new VirtualFile(
                PathUtilTest.joinAbs(NON_EXISTING_DIRS), store);
        int count = 0;
        StorageFile parent = vFile.getParentDir();
        while (parent != null) {

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        assertEquals(5, count);
    }


    public void testDeleteAll()
            throws IOException {
        DataStore store = getStore();
        String[] dirs = new String[] {
            "seg0", PathUtilTest.join("seg0", "dir1"),
            "seg1", PathUtilTest.join("seg0", "dir2")};
        for (int i=0; i < dirs.length; i++) {
            assertTrue(new VirtualFile(dirs[i], store).mkdir());

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                         new VirtualFile(files[i], store).exists());
        }
    }


    public void testRenameToSimple() {
        DataStore store = getStore();
        VirtualFile vFile = new VirtualFile("originalFile", store);
        assertFalse(vFile.canWrite());
        vFile.createNewFile();
        assertTrue(vFile.canWrite());
        VirtualFile newFile = new VirtualFile("newFile", store);

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     * Getting a random access file in write mode for a non-existing file
     * should cause the file to be created.
     */
    public void testGetRAFNonExisting()
            throws FileNotFoundException {
        DataStore store = getStore();
        VirtualFile vFile = new VirtualFile("aNewFile.txt", store);
        assertFalse(vFile.exists());
        StorageRandomAccessFile vRAF = vFile.getRandomAccessFile("rw");
        assertNotNull(vRAF);
        assertTrue(vFile.exists());

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     * Getting a random access file in read mode for a non-existing file
     * should fail, and the file shouldn't be created.
     */
    public void testGetRAFNonExistingReadMode()
            throws FileNotFoundException {
        DataStore store = getStore();
        VirtualFile vFile = new VirtualFile("aNewFile.txt", store);
        assertFalse(vFile.exists());
        try {
            vFile.getRandomAccessFile("r");
            fail("Cannot read from a non-exsiting file");

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     * <p>
     * Opening for reading only should work, opening for writing should fail.
     */
    public void testGetRAExistingReadOnly()
            throws FileNotFoundException {
        DataStore store = getStore();
        VirtualFile vFile = new VirtualFile("aNewFile.txt", store);
        assertFalse(vFile.exists());
        assertTrue(vFile.createNewFile());
        assertTrue(vFile.exists());
        assertTrue(vFile.setReadOnly());

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    /**
     * Opening a random access file on a directory should fail.
     */
    public void testGetRAFOnDirectory() {
        DataStore store = getStore();
        VirtualFile vFile = new VirtualFile("mydir", store);
        assertTrue(vFile.mkdir());
        assertTrue(vFile.exists());
        assertTrue(vFile.isDirectory());
        // Try opening in read mode.

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    /**
     * Tests that {@code listChildren} doesn't include too many entries.
     */
    public void testListChilderen() {
        DataStore store = getStore();
        VirtualFile dir1 = new VirtualFile(PathUtilTest.abs("mydir"), store);
        VirtualFile dir2 = new VirtualFile(
                PathUtilTest.abs("mydirectory"), store);
        VirtualFile file1 = new VirtualFile(
                PathUtilTest.joinAbs("mydir", "file1.txt"), store);

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    /**
     * Makes sure that the root can be created.
     */
    public void testCreateRoot() {
        DataStore store = new DataStore("testCreateRootStore");
        String path = PathUtilTest.joinAbs("these", "are", "directories");
        assertTrue(store.createAllParents(path));
        assertNotNull(store.createEntry(path, true));
        VirtualFile vf = new VirtualFile(path, store);
        assertTrue(vf.exists());
        assertTrue(vf.isDirectory());


        // Also test one Windows specific root.
        path = PathUtilTest.join("c:", "Documents and Settings", "directories");
        assertTrue(store.createAllParents(path));
        assertNotNull(store.createEntry(path, true));
        vf = new VirtualFile(path, store);
        assertTrue(vf.exists());
        assertTrue(vf.isDirectory());
    }

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    /**
     * Verify that the close() method of VirtualRandomAccessFile can be
     * called more than once.
     */
    public void testCloseIdempotent() throws IOException {
        DataStore store = getStore();
        VirtualFile f = new VirtualFile("afile", store);
        StorageRandomAccessFile raf = f.getRandomAccessFile("rw");
        raf.close();
        // The second close() used to throw NullPointerException (DERBY-5960)
        raf.close();

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org.apache.derby.impl.io.VFMemoryStorageFactory

org.apache.derbyTesting.unitTests.junit.VirtualFileTest

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