| /* |
| * 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; |
| |
| import java.io.DataInput; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| |
| import com.google.common.base.Objects; |
| |
| import org.apache.cassandra.cql3.Operator; |
| import org.apache.cassandra.io.util.DataOutputPlus; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| public final class IndexExpression |
| { |
| public final ByteBuffer column; |
| public final Operator operator; |
| public final ByteBuffer value; |
| |
| public IndexExpression(ByteBuffer column, Operator operator, ByteBuffer value) |
| { |
| this.column = column; |
| this.operator = operator; |
| this.value = value; |
| } |
| |
| /** |
| * Checks if the operator of this <code>IndexExpression</code> is a <code>CONTAINS</code> operator. |
| * |
| * @return <code>true</code> if the operator of this <code>IndexExpression</code> is a <code>CONTAINS</code> |
| * operator, <code>false</code> otherwise. |
| */ |
| public boolean isContains() |
| { |
| return Operator.CONTAINS == operator; |
| } |
| |
| /** |
| * Checks if the operator of this <code>IndexExpression</code> is a <code>CONTAINS_KEY</code> operator. |
| * |
| * @return <code>true</code> if the operator of this <code>IndexExpression</code> is a <code>CONTAINS_KEY</code> |
| * operator, <code>false</code> otherwise. |
| */ |
| public boolean isContainsKey() |
| { |
| return Operator.CONTAINS_KEY == operator; |
| } |
| |
| @Override |
| public String toString() |
| { |
| return String.format("%s %s %s", ByteBufferUtil.bytesToHex(column), operator, ByteBufferUtil.bytesToHex(value)); |
| } |
| |
| @Override |
| public boolean equals(Object o) |
| { |
| if (this == o) |
| return true; |
| |
| if (!(o instanceof IndexExpression)) |
| return false; |
| |
| IndexExpression ie = (IndexExpression) o; |
| |
| return Objects.equal(this.column, ie.column) |
| && Objects.equal(this.operator, ie.operator) |
| && Objects.equal(this.value, ie.value); |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| return Objects.hashCode(column, operator, value); |
| } |
| |
| /** |
| * Write the serialized version of this <code>IndexExpression</code> to the specified output. |
| * |
| * @param output the output to write to |
| * @throws IOException if an I/O problem occurs while writing to the specified output |
| */ |
| public void writeTo(DataOutputPlus output) throws IOException |
| { |
| ByteBufferUtil.writeWithShortLength(column, output); |
| operator.writeTo(output); |
| ByteBufferUtil.writeWithShortLength(value, output); |
| } |
| |
| /** |
| * Deserializes an <code>IndexExpression</code> instance from the specified input. |
| * |
| * @param input the input to read from |
| * @return the <code>IndexExpression</code> instance deserialized |
| * @throws IOException if a problem occurs while deserializing the <code>IndexExpression</code> instance. |
| */ |
| public static IndexExpression readFrom(DataInput input) throws IOException |
| { |
| return new IndexExpression(ByteBufferUtil.readWithShortLength(input), |
| Operator.readFrom(input), |
| ByteBufferUtil.readWithShortLength(input)); |
| } |
| } |