/*
* 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.client;
import com.facebook.presto.spi.type.NamedTypeSignature;
import com.facebook.presto.spi.type.ParameterKind;
import com.facebook.presto.spi.type.TypeSignatureParameter;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import javax.annotation.concurrent.Immutable;
import java.io.IOException;
import java.util.Objects;
import static java.lang.String.format;
@Immutable
@JsonDeserialize(using = ClientTypeSignatureParameter.ClientTypeSignatureParameterDeserializer.class)
public class ClientTypeSignatureParameter
{
private final ParameterKind kind;
private final Object value;
public ClientTypeSignatureParameter(TypeSignatureParameter typeParameterSignature)
{
this.kind = typeParameterSignature.getKind();
switch (kind) {
case TYPE:
value = new ClientTypeSignature(typeParameterSignature.getTypeSignature());
break;
case LONG:
value = typeParameterSignature.getLongLiteral();
break;
case NAMED_TYPE:
value = typeParameterSignature.getNamedTypeSignature();
break;
default:
throw new UnsupportedOperationException(format("Unknown kind [%s]", kind));
}
}
@JsonCreator
public ClientTypeSignatureParameter(
@JsonProperty("kind") ParameterKind kind,
@JsonProperty("value") Object value)
{
this.kind = kind;
this.value = value;
}
@JsonProperty
public ParameterKind getKind()
{
return kind;
}
@JsonProperty
public Object getValue()
{
return value;
}
private <A> A getValue(ParameterKind expectedParameterKind, Class<A> target)
{
if (kind != expectedParameterKind) {
throw new IllegalArgumentException(format("ParameterKind is [%s] but expected [%s]", kind, expectedParameterKind));
}
return target.cast(value);
}
public ClientTypeSignature getTypeSignature()
{
return getValue(ParameterKind.TYPE, ClientTypeSignature.class);
}
public Long getLongLiteral()
{
return getValue(ParameterKind.LONG, Long.class);
}
public NamedTypeSignature getNamedTypeSignature()
{
return getValue(ParameterKind.NAMED_TYPE, NamedTypeSignature.class);
}
@Override
public String toString()
{
return value.toString();
}
@Override
public boolean equals(Object o)
{
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
ClientTypeSignatureParameter other = (ClientTypeSignatureParameter) o;
return Objects.equals(this.kind, other.kind) &&
Objects.equals(this.value, other.value);
}
@Override
public int hashCode()
{
return Objects.hash(kind, value);
}
public static class ClientTypeSignatureParameterDeserializer extends JsonDeserializer<ClientTypeSignatureParameter>
{
private static final ObjectMapper MAPPER = new ObjectMapper();
@Override
public ClientTypeSignatureParameter deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException
{
JsonNode node = jp.getCodec().readTree(jp);
ParameterKind kind = MAPPER.readValue(MAPPER.treeAsTokens(node.get("kind")), ParameterKind.class);
JsonParser jsonValue = MAPPER.treeAsTokens(node.get("value"));
Object value;
switch (kind) {
case TYPE:
value = MAPPER.readValue(jsonValue, ClientTypeSignature.class);
break;
case NAMED_TYPE:
value = MAPPER.readValue(jsonValue, NamedTypeSignature.class);
break;
case LONG:
value = MAPPER.readValue(jsonValue, Long.class);
break;
default:
throw new UnsupportedOperationException(format("Unsupported kind [%s]", kind));
}
return new ClientTypeSignatureParameter(kind, value);
}
}
}