| /* |
| * 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.functions; |
| |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| |
| import org.apache.cassandra.cql3.CQL3Type; |
| import org.apache.cassandra.db.marshal.BytesType; |
| import org.apache.cassandra.exceptions.InvalidRequestException; |
| import org.apache.cassandra.serializers.MarshalException; |
| import org.apache.cassandra.transport.ProtocolVersion; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| public abstract class BytesConversionFcts |
| { |
| public static void addFunctionsTo(NativeFunctions functions) |
| { |
| for (CQL3Type type : CQL3Type.Native.values()) |
| { |
| if (type == CQL3Type.Native.BLOB) |
| continue; |
| |
| functions.add(new ToBlobFunction(type)); |
| functions.add(new FromBlobFunction(type)); |
| } |
| } |
| |
| // Most of the X_as_blob and blob_as_X functions are basically no-op since everything is |
| // bytes internally. They only "trick" the type system. |
| public static class ToBlobFunction extends NativeScalarFunction |
| { |
| private final CQL3Type fromType; |
| |
| public ToBlobFunction(CQL3Type fromType) |
| { |
| this(fromType, false); |
| } |
| |
| private ToBlobFunction(CQL3Type fromType, boolean useLegacyName) |
| { |
| super(fromType + (useLegacyName ? "asblob" : "_as_blob"), |
| BytesType.instance, |
| fromType.getType().udfType()); |
| this.fromType = fromType; |
| } |
| |
| @Override |
| public ByteBuffer execute(ProtocolVersion protocolVersion, List<ByteBuffer> parameters) |
| { |
| return parameters.get(0); |
| } |
| |
| @Override |
| public NativeFunction withLegacyName() |
| { |
| return new ToBlobFunction(fromType, true); |
| } |
| } |
| |
| public static class FromBlobFunction extends NativeScalarFunction |
| { |
| private final CQL3Type toType; |
| |
| public FromBlobFunction(CQL3Type toType) |
| { |
| this(toType, false); |
| } |
| |
| private FromBlobFunction(CQL3Type toType, boolean useLegacyName) |
| { |
| super((useLegacyName ? "blobas" : "blob_as_") + toType, |
| toType.getType().udfType(), |
| BytesType.instance); |
| this.toType = toType; |
| } |
| |
| @Override |
| public ByteBuffer execute(ProtocolVersion protocolVersion, List<ByteBuffer> parameters) |
| { |
| ByteBuffer val = parameters.get(0); |
| |
| if (val != null) |
| { |
| try |
| { |
| toType.getType().validate(val); |
| } |
| catch (MarshalException e) |
| { |
| throw new InvalidRequestException(String.format("In call to function %s, value 0x%s is not a " + |
| "valid binary representation for type %s", |
| name, ByteBufferUtil.bytesToHex(val), toType)); |
| } |
| } |
| |
| return val; |
| } |
| |
| @Override |
| public NativeFunction withLegacyName() |
| { |
| return new FromBlobFunction(toType, true); |
| } |
| } |
| } |