/*
* 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.connector.jmx;
import com.facebook.presto.spi.type.StandardTypes;
import com.facebook.presto.spi.type.Type;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.deser.std.FromStringDeserializer;
import com.google.common.collect.ImmutableMap;
import io.airlift.json.JsonCodec;
import io.airlift.json.JsonCodecFactory;
import io.airlift.json.ObjectMapperProvider;
import java.util.Map;
import static com.facebook.presto.spi.type.BigintType.BIGINT;
import static com.facebook.presto.spi.type.VarcharType.createUnboundedVarcharType;
import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Locale.ENGLISH;
public final class MetadataUtil
{
private MetadataUtil() {}
public static final JsonCodec<JmxTableHandle> TABLE_CODEC;
public static final JsonCodec<JmxColumnHandle> COLUMN_CODEC;
public static final JsonCodec<JmxSplit> SPLIT_CODEC;
static {
ObjectMapperProvider provider = new ObjectMapperProvider();
provider.setJsonDeserializers(ImmutableMap.of(Type.class, new TestingTypeDeserializer()));
JsonCodecFactory codecFactory = new JsonCodecFactory(provider);
TABLE_CODEC = codecFactory.jsonCodec(JmxTableHandle.class);
COLUMN_CODEC = codecFactory.jsonCodec(JmxColumnHandle.class);
SPLIT_CODEC = codecFactory.jsonCodec(JmxSplit.class);
}
public static final class TestingTypeDeserializer
extends FromStringDeserializer<Type>
{
private final Map<String, Type> types = ImmutableMap.<String, Type>builder()
.put(StandardTypes.BIGINT, BIGINT)
.put(StandardTypes.VARCHAR, createUnboundedVarcharType()) // with max value length in signature
.build();
public TestingTypeDeserializer()
{
super(Type.class);
}
@Override
protected Type _deserialize(String value, DeserializationContext context)
{
Type type = types.get(value.toLowerCase(ENGLISH));
checkArgument(type != null, "Unknown type %s", value);
return type;
}
}
}