792f606a64
Contains the cql3 grammer and supporting classes, which will be converted one by one. From commit bf599fb5b062cbcc652da78b7d699e7a01b949ad.
85 lines
3.3 KiB
Java
85 lines
3.3 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.cassandra.cql3.functions;
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import java.nio.ByteBuffer;
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import java.util.List;
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import org.apache.cassandra.db.marshal.AbstractType;
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import org.apache.cassandra.db.marshal.BytesType;
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import org.apache.cassandra.db.marshal.UTF8Type;
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import org.apache.cassandra.utils.ByteBufferUtil;
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import org.apache.cassandra.exceptions.InvalidRequestException;
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import org.apache.cassandra.serializers.MarshalException;
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public abstract class BytesConversionFcts
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{
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// Most of the XAsBlob and blobAsX functions are basically no-op since everything is
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// bytes internally. They only "trick" the type system.
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public static Function makeToBlobFunction(AbstractType<?> fromType)
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{
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String name = fromType.asCQL3Type() + "asblob";
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return new NativeScalarFunction(name, BytesType.instance, fromType)
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{
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public ByteBuffer execute(int protocolVersion, List<ByteBuffer> parameters)
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{
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return parameters.get(0);
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}
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};
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}
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public static Function makeFromBlobFunction(final AbstractType<?> toType)
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{
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final String name = "blobas" + toType.asCQL3Type();
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return new NativeScalarFunction(name, toType, BytesType.instance)
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{
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public ByteBuffer execute(int protocolVersion, List<ByteBuffer> parameters) throws InvalidRequestException
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{
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ByteBuffer val = parameters.get(0);
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try
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{
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if (val != null)
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toType.validate(val);
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return val;
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}
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catch (MarshalException e)
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{
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throw new InvalidRequestException(String.format("In call to function %s, value 0x%s is not a valid binary representation for type %s",
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name, ByteBufferUtil.bytesToHex(val), toType.asCQL3Type()));
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}
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}
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};
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}
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public static final Function VarcharAsBlobFct = new NativeScalarFunction("varcharasblob", BytesType.instance, UTF8Type.instance)
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{
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public ByteBuffer execute(int protocolVersion, List<ByteBuffer> parameters)
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{
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return parameters.get(0);
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}
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};
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public static final Function BlobAsVarcharFact = new NativeScalarFunction("blobasvarchar", UTF8Type.instance, BytesType.instance)
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{
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public ByteBuffer execute(int protocolVersion, List<ByteBuffer> parameters)
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{
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return parameters.get(0);
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}
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};
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}
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