com.facebook.presto.decoder.FieldValueProvider Maven / Gradle / Ivy
/*
* Licensed 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 com.facebook.presto.decoder;
import com.facebook.presto.common.block.Block;
import com.facebook.presto.spi.PrestoException;
import io.airlift.slice.Slice;
/**
* Base class for all providers that return values for a selected column.
*/
public abstract class FieldValueProvider
{
public boolean getBoolean()
{
throw new PrestoException(DecoderErrorCode.DECODER_CONVERSION_NOT_SUPPORTED, "conversion to boolean not supported");
}
public long getLong()
{
throw new PrestoException(DecoderErrorCode.DECODER_CONVERSION_NOT_SUPPORTED, "conversion to long not supported");
}
public double getDouble()
{
throw new PrestoException(DecoderErrorCode.DECODER_CONVERSION_NOT_SUPPORTED, "conversion to double not supported");
}
public Slice getSlice()
{
throw new PrestoException(DecoderErrorCode.DECODER_CONVERSION_NOT_SUPPORTED, "conversion to Slice not supported");
}
public Block getBlock()
{
throw new PrestoException(DecoderErrorCode.DECODER_CONVERSION_NOT_SUPPORTED, "conversion to Block not supported");
}
public abstract boolean isNull();
}
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