jetbrains.exodus.tree.INode Maven / Gradle / Ivy
/**
* Copyright 2010 - 2022 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jetbrains.exodus.tree;
import jetbrains.exodus.ByteIterable;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.io.PrintStream;
public interface INode extends Dumpable {
boolean hasValue();
@NotNull
ByteIterable getKey();
@Nullable
ByteIterable getValue();
INode EMPTY = new INode() {
@Override
public boolean hasValue() {
return false;
}
@NotNull
@Override
public ByteIterable getKey() {
return ByteIterable.EMPTY;
}
@Override
public ByteIterable getValue() {
return ByteIterable.EMPTY;
}
@Override
public void dump(PrintStream out, int level, ToString renderer) {
out.println("Empty node");
}
};
}