| /* |
| * 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.cql3.selection; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| |
| import com.google.common.base.Objects; |
| |
| import org.apache.cassandra.db.marshal.ListType; |
| import org.apache.cassandra.schema.TableMetadata; |
| import org.apache.cassandra.cql3.QueryOptions; |
| import org.apache.cassandra.cql3.ColumnSpecification; |
| import org.apache.cassandra.db.TypeSizes; |
| import org.apache.cassandra.db.filter.ColumnFilter; |
| import org.apache.cassandra.db.marshal.AbstractType; |
| import org.apache.cassandra.io.util.DataInputPlus; |
| import org.apache.cassandra.io.util.DataOutputPlus; |
| import org.apache.cassandra.transport.ProtocolVersion; |
| |
| final class WritetimeOrTTLSelector extends Selector |
| { |
| static final SelectorDeserializer deserializer = new SelectorDeserializer() |
| { |
| @Override |
| protected Selector deserialize(DataInputPlus in, int version, TableMetadata metadata) throws IOException |
| { |
| Selector selected = serializer.deserialize(in, version, metadata); |
| int idx = in.readInt(); |
| int ordinal = in.readByte(); |
| Selectable.WritetimeOrTTL.Kind kind = Selectable.WritetimeOrTTL.Kind.fromOrdinal(ordinal); |
| boolean isMultiCell = in.readBoolean(); |
| return new WritetimeOrTTLSelector(selected, idx, kind, isMultiCell); |
| } |
| }; |
| |
| private final Selector selected; |
| private final int columnIndex; |
| private final Selectable.WritetimeOrTTL.Kind kind; |
| private ByteBuffer current; |
| private final boolean isMultiCell; |
| private boolean isSet; |
| |
| public static Factory newFactory(final Selector.Factory factory, final int columnIndex, final Selectable.WritetimeOrTTL.Kind kind, boolean isMultiCell) |
| { |
| return new Factory() |
| { |
| @Override |
| protected String getColumnName() |
| { |
| return String.format("%s(%s)", kind.name, factory.getColumnName()); |
| } |
| |
| @Override |
| protected AbstractType<?> getReturnType() |
| { |
| AbstractType<?> type = kind.returnType; |
| return isMultiCell && !kind.aggregatesMultiCell() ? ListType.getInstance(type, false) : type; |
| } |
| |
| @Override |
| protected void addColumnMapping(SelectionColumnMapping mapping, ColumnSpecification resultsColumn) |
| { |
| factory.addColumnMapping(mapping, resultsColumn); |
| } |
| |
| @Override |
| public Selector newInstance(QueryOptions options) |
| { |
| return new WritetimeOrTTLSelector(factory.newInstance(options), columnIndex, kind, isMultiCell); |
| } |
| |
| @Override |
| public boolean isWritetimeSelectorFactory() |
| { |
| return kind != Selectable.WritetimeOrTTL.Kind.TTL; |
| } |
| |
| @Override |
| public boolean isTTLSelectorFactory() |
| { |
| return kind == Selectable.WritetimeOrTTL.Kind.TTL; |
| } |
| |
| @Override |
| public boolean isMaxWritetimeSelectorFactory() |
| { |
| return kind == Selectable.WritetimeOrTTL.Kind.MAX_WRITE_TIME; |
| } |
| |
| @Override |
| public boolean areAllFetchedColumnsKnown() |
| { |
| return true; |
| } |
| |
| @Override |
| public void addFetchedColumns(ColumnFilter.Builder builder) |
| { |
| factory.addFetchedColumns(builder); |
| } |
| }; |
| } |
| |
| public void addFetchedColumns(ColumnFilter.Builder builder) |
| { |
| selected.addFetchedColumns(builder); |
| } |
| |
| public void addInput(InputRow input) |
| { |
| if (isSet) |
| return; |
| |
| isSet = true; |
| |
| selected.addInput(input); |
| ProtocolVersion protocolVersion = input.getProtocolVersion(); |
| |
| switch (kind) |
| { |
| case WRITE_TIME: |
| current = selected.getWritetimes(protocolVersion).toByteBuffer(protocolVersion); |
| break; |
| case MAX_WRITE_TIME: |
| current = selected.getWritetimes(protocolVersion).max().toByteBuffer(protocolVersion); |
| break; |
| case TTL: |
| current = selected.getTTLs(protocolVersion).toByteBuffer(protocolVersion); |
| break; |
| } |
| } |
| |
| public ByteBuffer getOutput(ProtocolVersion protocolVersion) |
| { |
| return current; |
| } |
| |
| public void reset() |
| { |
| selected.reset(); |
| isSet = false; |
| current = null; |
| } |
| |
| public AbstractType<?> getType() |
| { |
| AbstractType<?> type = kind.returnType; |
| return isMultiCell ? ListType.getInstance(type, false) : type; |
| } |
| |
| @Override |
| public String toString() |
| { |
| return selected.toString(); |
| } |
| |
| private WritetimeOrTTLSelector(Selector selected, int idx, Selectable.WritetimeOrTTL.Kind kind, boolean isMultiCell) |
| { |
| super(Kind.WRITETIME_OR_TTL_SELECTOR); |
| this.selected = selected; |
| this.columnIndex = idx; |
| this.kind = kind; |
| this.isMultiCell = isMultiCell; |
| } |
| |
| @Override |
| public boolean equals(Object o) |
| { |
| if (this == o) |
| return true; |
| |
| if (!(o instanceof WritetimeOrTTLSelector)) |
| return false; |
| |
| WritetimeOrTTLSelector s = (WritetimeOrTTLSelector) o; |
| |
| return Objects.equal(selected, s.selected) && kind == s.kind; |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| return Objects.hashCode(selected, kind); |
| } |
| |
| @Override |
| protected int serializedSize(int version) |
| { |
| return serializer.serializedSize(selected, version) |
| + TypeSizes.sizeof(columnIndex) |
| + TypeSizes.sizeofUnsignedVInt(kind.ordinal()) |
| + TypeSizes.sizeof(isMultiCell); |
| } |
| |
| @Override |
| protected void serialize(DataOutputPlus out, int version) throws IOException |
| { |
| serializer.serialize(selected, out, version); |
| out.writeInt(columnIndex); |
| out.writeByte(kind.ordinal()); |
| out.writeBoolean(isMultiCell); |
| } |
| } |