/*
* 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.example;
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.List;
import java.util.Map;
import static com.facebook.presto.spi.type.BigintType.BIGINT;
import static com.facebook.presto.spi.type.BooleanType.BOOLEAN;
import static com.facebook.presto.spi.type.DoubleType.DOUBLE;
import static com.facebook.presto.spi.type.IntegerType.INTEGER;
import static com.facebook.presto.spi.type.VarcharType.createUnboundedVarcharType;
import static io.airlift.json.JsonCodec.listJsonCodec;
import static java.util.Locale.ENGLISH;
public final class MetadataUtil
{
private MetadataUtil()
{
}
public static final JsonCodec<Map<String, List<ExampleTable>>> CATALOG_CODEC;
public static final JsonCodec<ExampleTable> TABLE_CODEC;
public static final JsonCodec<ExampleColumnHandle> COLUMN_CODEC;
static {
ObjectMapperProvider objectMapperProvider = new ObjectMapperProvider();
objectMapperProvider.setJsonDeserializers(ImmutableMap.of(Type.class, new TestingTypeDeserializer()));
JsonCodecFactory codecFactory = new JsonCodecFactory(objectMapperProvider);
CATALOG_CODEC = codecFactory.mapJsonCodec(String.class, listJsonCodec(ExampleTable.class));
TABLE_CODEC = codecFactory.jsonCodec(ExampleTable.class);
COLUMN_CODEC = codecFactory.jsonCodec(ExampleColumnHandle.class);
}
public static final class TestingTypeDeserializer
extends FromStringDeserializer<Type>
{
private final Map<String, Type> types = ImmutableMap.of(
StandardTypes.BOOLEAN, BOOLEAN,
StandardTypes.BIGINT, BIGINT,
StandardTypes.INTEGER, INTEGER,
StandardTypes.DOUBLE, DOUBLE,
StandardTypes.VARCHAR, createUnboundedVarcharType());
public TestingTypeDeserializer()
{
super(Type.class);
}
@Override
protected Type _deserialize(String value, DeserializationContext context)
{
Type type = types.get(value.toLowerCase(ENGLISH));
if (type == null) {
throw new IllegalArgumentException(String.valueOf("Unknown type " + value));
}
return type;
}
}
}