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

org.apache.derby.impl.io.vfmem.VirtualFile
Represents a file in the virtual file system.
A virtual file is not created until one of the following methods are invoked:
- {@code createNewFile}
- {@code getOutputStream}
- {@code getRandomAccessFile}
- {@code mkdir}
- {@code mkdirs}
When a method that requires access to the file data or to know if the file exists or not, the associated data store is consulted.

                    this.dbData = new DataStore(canonicalName);
                    DATABASES.put(canonicalName, dbData);
                }
            }
            // Specify the data directory and the temp directory.
            dataDirectory = new VirtualFile(canonicalName, dbData);
            tempDir = new VirtualFile(normalizePath(canonicalName, "tmp"),
                                      dbData);


        // Handle cases where the database name is null, but a system home
        // directory has been specified.
        } else if (home != null) {
            // Return the "system home directory" and create a temporary
            // directory for it.
            final String absHome = new File(home).getCanonicalPath();
            synchronized (DATABASES) {
                dbData = (DataStore)DATABASES.get(absHome);
                if (dbData == null) {
                    // Create a new data store for the specified home.
                    dbData = new DataStore(absHome);
                    DATABASES.put(absHome, dbData);
                }
            }
            dataDirectory = new VirtualFile(absHome, dbData);
            tempDir = new VirtualFile(getSeparator() + "tmp", dbData);
        }


        // Create the temporary directory, if one has been specified.
        // Creating the temporary directory too early casues the
        // BaseDataFileFactory to fail, hence the check for uniqueName.

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        // files are stored.
        if (path == null) {
            // Return the database directory as described by StorageFactory.
            return dataDirectory;
        }
        return new VirtualFile(normalizePath(path), dbData);
    }

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     * @param directoryName the name of the parent directory
     * @param fileName the name of the file
     * @return A path handle.
     */
    public StorageFile newStorageFile(String directoryName, String fileName) {
            return new VirtualFile(
                                normalizePath(directoryName, fileName), dbData);
    }

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        super(name);
    }


    public void testCreateFileInRoot() {
        DataStore store = getStore();
        VirtualFile vFile = new VirtualFile("service.properties", store);
        assertFalse(new VirtualFile("service.properties", store).exists());
        assertFalse(vFile.exists());
    }

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        assertFalse(vFile.exists());
    }


    public void testCreateDirInRoot() {
        DataStore store = getStore();
        VirtualFile vFile = new VirtualFile("seg0", store);
        assertFalse(vFile.exists());
        vFile.mkdir();
        assertTrue(vFile.exists());
        assertTrue(vFile.isDirectory());
    }

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        assertTrue(vFile.isDirectory());
    }


    public void testCreateInvalidDir() {
        DataStore store = getStore();
        VirtualFile vFile = new VirtualFile(
                PathUtilTest.join(NON_EXISTING_DIRS),
                store);
        assertFalse(vFile.exists());
        VirtualFile tmp = new VirtualFile("", store);
        assertTrue(tmp.mkdir());
        assertFalse("Dir creation should have failed", vFile.mkdir());
    }

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        assertFalse("Dir creation should have failed", vFile.mkdir());
    }


    public void testMkdirsValidRelative() {
        DataStore store = getStore();
        VirtualFile vFile = new VirtualFile(
                PathUtilTest.join(NON_EXISTING_DIRS),
                store);
        assertTrue(vFile.mkdirs());
    }

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        assertTrue(vFile.mkdirs());
    }


    public void testMkdirsValidAbsolute() {
        DataStore store = getStore();
        VirtualFile vFile = new VirtualFile(
                PathUtilTest.joinAbs(NON_EXISTING_DIRS),
                store);
        assertTrue(vFile.mkdirs());
    }

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    }


    public void testMkdirsInvalidAbsolute()
            throws IOException {
        DataStore store = getStore();
        VirtualFile tmp = new VirtualFile(PathUtilTest.abs("directory"), store);
        assertTrue(tmp.mkdir());
        tmp = new VirtualFile(
                PathUtilTest.joinAbs("directory", "afile"),
                store);
        assertTrue(tmp.createNewFile());
        assertTrue(tmp.exists());
        assertFalse(tmp.isDirectory());
        VirtualFile vFile = new VirtualFile(
                PathUtilTest.joinAbs("directory", "afile", "anotherdir"),
                store);
        assertFalse(vFile.mkdir());
        assertFalse(vFile.mkdirs());
    }

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    }


    public void testMkdirsInvalidRelative()
            throws IOException {
        DataStore store = getStore();
        VirtualFile tmp = new VirtualFile("seg0", store);
        assertTrue(tmp.mkdir());
        tmp = new VirtualFile(PathUtilTest.join("seg0", "datafile"), store);
        assertTrue(tmp.createNewFile());
        assertTrue(tmp.exists());
        assertFalse(tmp.isDirectory());
        VirtualFile vFile = new VirtualFile(
                PathUtilTest.join("seg0", "datafile", "anotherdir"), store);
        assertFalse(vFile.mkdir());
        assertFalse(vFile.mkdirs());
    }

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org.apache.derby.impl.io.VFMemoryStorageFactory

org.apache.derbyTesting.unitTests.junit.VirtualFileTest

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