Examples with PageReference org.sirix.page.PageReference used on opensource projects

Example 1 with PageReference

use of org.sirix.page.PageReference in project sirix by sirixdb.

the class BerkeleyReader method readUberPageReference.

@Override
public PageReference readUberPageReference() throws SirixIOException {
    final DatabaseEntry valueEntry = new DatabaseEntry();
    final DatabaseEntry keyEntry = new DatabaseEntry();
    TupleBinding.getPrimitiveBinding(Long.class).objectToEntry(-1l, keyEntry);
    try {
        final OperationStatus status = mDatabase.get(mTxn, keyEntry, valueEntry, LockMode.DEFAULT);
        PageReference uberPageReference = new PageReference();
        if (status == OperationStatus.SUCCESS) {
            uberPageReference.setKey(TupleBinding.getPrimitiveBinding(Long.class).entryToObject(valueEntry));
        }
        final UberPage page = (UberPage) read(uberPageReference, null);
        if (uberPageReference != null) {
            uberPageReference.setPage(page);
        }
        return uberPageReference;
    } catch (final DatabaseException e) {
        throw new SirixIOException(e);
    }
}

Example 2 with PageReference

use of org.sirix.page.PageReference in project sirix by sirixdb.

the class FileReader method readUberPageReference.

@Override
public PageReference readUberPageReference() throws SirixIOException {
    final PageReference uberPageReference = new PageReference();
    try {
        // Read primary beacon.
        mFile.seek(0);
        uberPageReference.setKey(mFile.readLong());
        final UberPage page = (UberPage) read(uberPageReference, null);
        uberPageReference.setPage(page);
        return uberPageReference;
    } catch (final IOException e) {
        throw new SirixIOException(e);
    }
}

Example 3 with PageReference

use of org.sirix.page.PageReference in project sirix by sirixdb.

the class IOTestHelper method testReadWriteFirstRef.

/**
 * Test reading/writing the first reference.
 *
 * @param resourceConf {@link ResourceConfiguration} reference
 * @throws SirixException if something went wrong
 */
public static void testReadWriteFirstRef(final ResourceConfiguration resourceConf) throws SirixException {
    final Storage fac = StorageType.getStorage(resourceConf);
    final PageReference pageRef1 = new PageReference();
    final UberPage page1 = new UberPage();
    pageRef1.setPage(page1);
    // same instance check
    final Writer writer = fac.createWriter();
    writer.writeUberPageReference(pageRef1);
    final PageReference pageRef2 = writer.readUberPageReference();
    assertEquals(((UberPage) pageRef1.getPage()).getRevisionCount(), ((UberPage) pageRef2.getPage()).getRevisionCount());
    writer.close();
    // new instance check
    final Reader reader = fac.createReader();
    final PageReference pageRef3 = reader.readUberPageReference();
    assertEquals(((UberPage) pageRef1.getPage()).getRevisionCount(), ((UberPage) pageRef3.getPage()).getRevisionCount());
    reader.close();
    fac.close();
}

Example 4 with PageReference

use of org.sirix.page.PageReference in project sirix by sirixdb.

the class StorageTest method testFirstRef.

/**
 * Test method for {@link org.ByteHandler.io.bytepipe.IByteHandler#deserialize(byte[])} and for
 * {@link org.ByteHandler.io.bytepipe.IByteHandler#serialize(byte[])}.
 *
 * @throws SirixIOException
 */
@Test(dataProvider = "instantiateStorages")
public void testFirstRef(final Class<Storage> clazz, final Storage[] storages) throws SirixException {
    for (final Storage handler : storages) {
        try {
            final PageReference pageRef1 = new PageReference();
            final UberPage page1 = new UberPage();
            pageRef1.setPage(page1);
            // same instance check
            final PageReference pageRef2;
            try (final Writer writer = handler.createWriter()) {
                pageRef2 = writer.writeUberPageReference(pageRef1).readUberPageReference();
                assertEquals(new StringBuilder("Check for ").append(handler.getClass()).append(" failed.").toString(), ((UberPage) pageRef1.getPage()).getRevisionCount(), ((UberPage) pageRef2.getPage()).getRevisionCount());
            }
            // new instance check
            try (final Reader reader = handler.createReader()) {
                final PageReference pageRef3 = reader.readUberPageReference();
                assertEquals(new StringBuilder("Check for ").append(handler.getClass()).append(" failed.").toString(), pageRef2.getKey(), pageRef3.getKey());
                assertEquals(new StringBuilder("Check for ").append(handler.getClass()).append(" failed.").toString(), ((UberPage) pageRef2.getPage()).getRevisionCount(), ((UberPage) pageRef3.getPage()).getRevisionCount());
            }
        } finally {
            handler.close();
        }
    }
}

Example 5 with PageReference

use of org.sirix.page.PageReference in project sirix by sirixdb.

the class PageReadTrxImpl method getPageReferenceForPage.

/**
 * Find reference pointing to leaf page of an indirect tree.
 *
 * @param startReference start reference pointing to the indirect tree
 * @param recordPageKey key to look up in the indirect tree
 * @return reference denoted by key pointing to the leaf page
 *
 * @throws SirixIOException if an I/O error occurs
 */
@Nullable
@Override
public final PageReference getPageReferenceForPage(final PageReference startReference, @Nonnegative final long recordPageKey, final int index, final PageKind pageKind) throws SirixIOException {
    assertNotClosed();
    // Initial state pointing to the indirect page of level 0.
    PageReference reference = checkNotNull(startReference);
    checkArgument(recordPageKey >= 0, "key must be >= 0!");
    checkNotNull(pageKind);
    int offset = 0;
    long levelKey = recordPageKey;
    final int[] inpLevelPageCountExp = mUberPage.getPageCountExp(pageKind);
    // Iterate through all levels.
    for (int level = 0, height = inpLevelPageCountExp.length; level < height; level++) {
        final Page derefPage = dereferenceIndirectPageReference(reference);
        if (derefPage == null) {
            reference = null;
            break;
        } else {
            offset = (int) (levelKey >> inpLevelPageCountExp[level]);
            levelKey -= offset << inpLevelPageCountExp[level];
            try {
                // assert offset >= 0 && offset < mUberPage.getPageReferenceCount(pageKind);
                reference = derefPage.getReference(offset);
            } catch (final IndexOutOfBoundsException e) {
                throw new SirixIOException("Node key isn't supported, it's too big!");
            }
        }
    }
    // Return reference to leaf of indirect tree.
    return reference;
}