jetbrains.exodus.log.ByteIterableWithAddress 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.log;
import jetbrains.exodus.ByteIterable;
import org.jetbrains.annotations.NotNull;
public abstract class ByteIterableWithAddress implements ByteIterable {
public static final ByteIterableWithAddress EMPTY = getEmpty(Loggable.NULL_ADDRESS);
private final long address;
protected ByteIterableWithAddress(final long address) {
this.address = address;
}
public final long getDataAddress() {
return address;
}
public byte byteAt(final int offset) {
return iterator(offset).next();
}
public long nextLong(final int offset, final int length) {
return iterator(offset).nextLong(length);
}
public int getCompressedUnsignedInt() {
return CompressedUnsignedLongByteIterable.getInt(this);
}
@Override
public abstract ByteIteratorWithAddress iterator();
public abstract ByteIteratorWithAddress iterator(final int offset);
public abstract int compareTo(final int offset, final int len, @NotNull final ByteIterable right);
public abstract ByteIterableWithAddress clone(final int offset);
@Override
public byte[] getBytesUnsafe() {
throw new UnsupportedOperationException();
}
@Override
public int getLength() {
throw new UnsupportedOperationException();
}
@NotNull
@Override
public ByteIterable subIterable(final int offset, final int length) {
return new LogAwareFixedLengthByteIterable(this, offset, length);
}
@Override
public int compareTo(@NotNull final ByteIterable right) {
// can't compare
throw new UnsupportedOperationException();
}
static ByteIterableWithAddress getEmpty(final long address) {
return new ArrayByteIterableWithAddress(address, ByteIterable.EMPTY_BYTES, 0, 0);
}
}