io.sirix.node.NullNode Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of sirix-core Show documentation
Show all versions of sirix-core Show documentation
SirixDB is a hybrid on-disk and in-memory document oriented, versioned database system. It has a lightweight buffer manager, stores everything in a huge persistent and durable tree and allows efficient reconstruction of every revision. Furthermore, SirixDB implements change tracking, diffing and supports time travel queries.
/*
* Copyright (c) 2011, University of Konstanz, Distributed Systems Group All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted
* provided that the following conditions are met: * Redistributions of source code must retain the
* above copyright notice, this list of conditions and the following disclaimer. * Redistributions
* in binary form must reproduce the above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other materials provided with the distribution.
* * Neither the name of the University of Konstanz nor the names of its contributors may be used to
* endorse or promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package io.sirix.node;
import com.google.common.base.Objects;
import net.openhft.chronicle.bytes.Bytes;
import org.checkerframework.checker.nullness.qual.Nullable;
import io.sirix.node.interfaces.Node;
import io.sirix.node.interfaces.StructNode;
import io.sirix.node.interfaces.immutable.ImmutableNode;
import io.sirix.settings.Fixed;
import java.nio.ByteBuffer;
import static java.util.Objects.requireNonNull;
/**
* Null node (NullObject pattern).
*
* @author Johannes Lichtenberger, University of Konstanz
*
*/
public final class NullNode implements StructNode {
/** The underlying item. */
private final ImmutableNode node;
/**
* Constructor.
*
* @param node the underlying node which is wrapped
* @throws NullPointerException if {@code pNode} is {@code null}
*/
public NullNode(final ImmutableNode node) {
this.node = requireNonNull(node);
}
@Override
public long computeHash(Bytes bytes) {
throw new UnsupportedOperationException();
}
@Override
public long getFirstChildKey() {
return Fixed.NULL_NODE_KEY.getStandardProperty();
}
@Override
public void setFirstChildKey(long firstChildKey) {
throw new UnsupportedOperationException();
}
@Override
public long getLastChildKey() {
return Fixed.NULL_NODE_KEY.getStandardProperty();
}
@Override
public void setLastChildKey(long nodeKey) {
throw new UnsupportedOperationException();
}
@Override
public void decrementChildCount() {
throw new UnsupportedOperationException();
}
@Override
public void incrementChildCount() {
throw new UnsupportedOperationException();
}
@Override
public void setHash(final long hash) {
throw new UnsupportedOperationException();
}
@Override
public long getHash() {
throw new UnsupportedOperationException();
}
@Override
public long getNodeKey() {
return node.getNodeKey();
}
@Override
public long getParentKey() {
return node.getParentKey();
}
@Override
public boolean hasParent() {
return node.hasParent();
}
@Override
public NodeKind getKind() {
// Node kind is always of type Kind.
return node.getKind();
}
@Override
public void setParentKey(long nodeKey) {
throw new UnsupportedOperationException();
}
@Override
public void setTypeKey(int typeKey) {
throw new UnsupportedOperationException();
}
@Override
public boolean hasFirstChild() {
return false;
}
@Override
public boolean hasLastChild() {
return false;
}
@Override
public boolean hasLeftSibling() {
return false;
}
@Override
public boolean hasRightSibling() {
return false;
}
@Override
public long getChildCount() {
return 0;
}
@Override
public long getLeftSiblingKey() {
return Fixed.NULL_NODE_KEY.getStandardProperty();
}
@Override
public long getRightSiblingKey() {
return Fixed.NULL_NODE_KEY.getStandardProperty();
}
@Override
public void setRightSiblingKey(long nodeKey) {
throw new UnsupportedOperationException();
}
@Override
public void setLeftSiblingKey(long nodeKey) {
throw new UnsupportedOperationException();
}
@Override
public long getDescendantCount() {
return 0;
}
@Override
public void decrementDescendantCount() {
throw new UnsupportedOperationException();
}
@Override
public void incrementDescendantCount() {
throw new UnsupportedOperationException();
}
@Override
public void setDescendantCount(long descendantCount) {
throw new UnsupportedOperationException();
}
@Override
public boolean isSameItem(final @Nullable Node other) {
return node.isSameItem(other);
}
@Override
public int getPreviousRevisionNumber() {
return node.getPreviousRevisionNumber();
}
@Override
public int getLastModifiedRevisionNumber() {
return node.getLastModifiedRevisionNumber();
}
@Override
public boolean equals(final @Nullable Object obj) {
if (obj instanceof final NullNode other) {
return Objects.equal(node, other.node);
}
return false;
}
@Override
public int hashCode() {
return Objects.hashCode(node);
}
@Override
public void setDeweyID(SirixDeweyID id) {
throw new UnsupportedOperationException();
}
@Override
public SirixDeweyID getDeweyID() {
throw new UnsupportedOperationException();
}
@Override
public byte[] getDeweyIDAsBytes() {
throw new UnsupportedOperationException();
}
@Override
public void setPreviousRevision(int revision) {
throw new UnsupportedOperationException();
}
@Override
public void setLastModifiedRevision(int revision) {
throw new UnsupportedOperationException();
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy