| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 |
| * |
| * http://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 org.apache.cassandra.db.composites; |
| |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| |
| import org.apache.cassandra.db.marshal.AbstractType; |
| |
| /** |
| * A not truly-composite CType. |
| */ |
| public class SimpleCType extends AbstractCType |
| { |
| protected final AbstractType<?> type; |
| |
| public SimpleCType(AbstractType<?> type) |
| { |
| super(type.isByteOrderComparable()); |
| this.type = type; |
| } |
| |
| public boolean isCompound() |
| { |
| return false; |
| } |
| |
| public int size() |
| { |
| return 1; |
| } |
| |
| public int compare(Composite c1, Composite c2) |
| { |
| if (isByteOrderComparable) |
| return AbstractSimpleCellNameType.compareUnsigned(c1, c2); |
| |
| assert !(c1.isEmpty() | c2.isEmpty()); |
| // This method assumes that simple composites never have an EOC != NONE. This assumption |
| // stands in particular on the fact that a Composites.EMPTY never has a non-NONE EOC. If |
| // this ever change, we'll need to update this. |
| return type.compare(c1.get(0), c2.get(0)); |
| } |
| |
| public AbstractType<?> subtype(int i) |
| { |
| if (i != 0) |
| throw new IndexOutOfBoundsException(); |
| return type; |
| } |
| |
| public Composite fromByteBuffer(ByteBuffer bytes) |
| { |
| return !bytes.hasRemaining() ? Composites.EMPTY : new SimpleComposite(bytes); |
| } |
| |
| public CBuilder builder() |
| { |
| return new SimpleCBuilder(this); |
| } |
| |
| public CType setSubtype(int position, AbstractType<?> newType) |
| { |
| if (position != 0) |
| throw new IndexOutOfBoundsException(); |
| return new SimpleCType(newType); |
| } |
| |
| // Use sparingly, it defeats the purpose |
| public AbstractType<?> asAbstractType() |
| { |
| return type; |
| } |
| |
| public static class SimpleCBuilder implements CBuilder |
| { |
| private final CType type; |
| private ByteBuffer value; |
| |
| public SimpleCBuilder(CType type) |
| { |
| this.type = type; |
| } |
| |
| public int remainingCount() |
| { |
| return value == null ? 1 : 0; |
| } |
| |
| public CBuilder add(ByteBuffer value) |
| { |
| if (this.value != null) |
| throw new IllegalStateException(); |
| this.value = value; |
| return this; |
| } |
| |
| public CBuilder add(Object value) |
| { |
| return add(((AbstractType)type.subtype(0)).decompose(value)); |
| } |
| |
| public Composite build() |
| { |
| if (value == null || !value.hasRemaining()) |
| return Composites.EMPTY; |
| |
| // If we're building a dense cell name, then we can directly allocate the |
| // CellName object as it's complete. |
| if (type instanceof CellNameType && ((CellNameType)type).isDense()) |
| return new SimpleDenseCellName(value); |
| |
| return new SimpleComposite(value); |
| } |
| |
| public Composite buildWith(ByteBuffer value) |
| { |
| if (this.value != null) |
| throw new IllegalStateException(); |
| |
| if (value == null || !value.hasRemaining()) |
| return Composites.EMPTY; |
| |
| // If we're building a dense cell name, then we can directly allocate the |
| // CellName object as it's complete. |
| if (type instanceof CellNameType && ((CellNameType)type).isDense()) |
| return new SimpleDenseCellName(value); |
| |
| return new SimpleComposite(value); |
| } |
| |
| public Composite buildWith(List<ByteBuffer> values) |
| { |
| if (values.size() > 1) |
| throw new IllegalStateException(); |
| if (values.isEmpty()) |
| return Composites.EMPTY; |
| return buildWith(values.get(0)); |
| } |
| } |
| } |