| /* |
| * 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 org.apache.cassandra.db.filter.ColumnSlice; |
| import org.apache.cassandra.db.marshal.CompositeType; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| public abstract class AbstractComposite implements Composite |
| { |
| public boolean isEmpty() |
| { |
| return size() == 0; |
| } |
| |
| public boolean isStatic() |
| { |
| return false; |
| } |
| |
| public EOC eoc() |
| { |
| return EOC.NONE; |
| } |
| |
| public Composite start() |
| { |
| return withEOC(EOC.START); |
| } |
| |
| public Composite end() |
| { |
| return withEOC(EOC.END); |
| } |
| |
| public Composite withEOC(EOC newEoc) |
| { |
| // Note: CompositeBound overwrite this so we assume the EOC of this is NONE |
| switch (newEoc) |
| { |
| case START: |
| return BoundedComposite.startOf(this); |
| case END: |
| return BoundedComposite.endOf(this); |
| default: |
| return this; |
| } |
| } |
| |
| public ColumnSlice slice() |
| { |
| return new ColumnSlice(start(), end()); |
| } |
| |
| public ByteBuffer toByteBuffer() |
| { |
| // This is the legacy format of composites. |
| // See org.apache.cassandra.db.marshal.CompositeType for details. |
| ByteBuffer result = ByteBuffer.allocate(dataSize() + 3 * size() + (isStatic() ? 2 : 0)); |
| if (isStatic()) |
| ByteBufferUtil.writeShortLength(result, CompositeType.STATIC_MARKER); |
| |
| for (int i = 0; i < size(); i++) |
| { |
| ByteBuffer bb = get(i); |
| ByteBufferUtil.writeShortLength(result, bb.remaining()); |
| result.put(bb.duplicate()); |
| result.put((byte)0); |
| } |
| result.flip(); |
| return result; |
| } |
| |
| public int dataSize() |
| { |
| int size = 0; |
| for (int i = 0; i < size(); i++) |
| size += get(i).remaining(); |
| return size; |
| } |
| |
| public boolean isPrefixOf(CType type, Composite c) |
| { |
| if (size() > c.size() || isStatic() != c.isStatic()) |
| return false; |
| |
| for (int i = 0; i < size(); i++) |
| { |
| if (type.subtype(i).compare(get(i), c.get(i)) != 0) |
| return false; |
| } |
| return true; |
| } |
| |
| @Override |
| public boolean equals(Object o) |
| { |
| if (this == o) |
| return true; |
| |
| if(!(o instanceof Composite)) |
| return false; |
| |
| Composite c = (Composite)o; |
| if (size() != c.size() || isStatic() != c.isStatic()) |
| return false; |
| |
| for (int i = 0; i < size(); i++) |
| { |
| if (!get(i).equals(c.get(i))) |
| return false; |
| } |
| return eoc() == c.eoc(); |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| int h = 31; |
| for (int i = 0; i < size(); i++) |
| h += get(i).hashCode(); |
| return h + eoc().hashCode() + (isStatic() ? 1 : 0); |
| } |
| } |