com.facebook.presto.jdbc.internal.common.predicate.NullableValue 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.jdbc.internal.common.predicate;
import com.facebook.presto.jdbc.internal.common.Utils;
import com.facebook.presto.jdbc.internal.common.block.Block;
import com.facebook.presto.jdbc.internal.common.type.Type;
import com.facebook.presto.jdbc.internal.jackson.annotation.JsonCreator;
import com.facebook.presto.jdbc.internal.jackson.annotation.JsonProperty;
import java.util.Objects;
import static java.util.Objects.requireNonNull;
// TODO: When we move RowExpressions to the SPI, we should get rid of this. This is effectively a ConstantExpression.
@Deprecated
public final class NullableValue
{
private final Type type;
private final Object value;
public NullableValue(Type type, Object value)
{
requireNonNull(type, "type is null");
if (value != null && !Primitives.wrap(type.getJavaType()).isInstance(value)) {
throw new IllegalArgumentException(String.format("Object '%s' does not match type %s", value, type.getJavaType()));
}
this.type = type;
this.value = value;
}
public static NullableValue of(Type type, Object value)
{
requireNonNull(value, "value is null");
return new NullableValue(type, value);
}
public static NullableValue asNull(Type type)
{
return new NullableValue(type, null);
}
// Jackson deserialization only
@JsonCreator
public static NullableValue fromSerializable(@JsonProperty("serializable") Serializable serializable)
{
Type type = serializable.getType();
Block block = serializable.getBlock();
return new NullableValue(type, block == null ? null : Utils.blockToNativeValue(type, block));
}
// Jackson serialization only
@JsonProperty
public Serializable getSerializable()
{
return new Serializable(type, value == null ? null : Utils.nativeValueToBlock(type, value));
}
public Block asBlock()
{
return Utils.nativeValueToBlock(type, value);
}
public Type getType()
{
return type;
}
public boolean isNull()
{
return value == null;
}
public Object getValue()
{
return value;
}
@Override
public int hashCode()
{
int hash = Objects.hash(type);
if (value != null) {
hash = hash * 31 + (int) type.hash(Utils.nativeValueToBlock(type, value), 0);
}
return hash;
}
@Override
public boolean equals(Object obj)
{
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
NullableValue other = (NullableValue) obj;
return Objects.equals(this.type, other.type)
&& (this.value == null) == (other.value == null)
&& (this.value == null || type.equalTo(Utils.nativeValueToBlock(type, value), 0, Utils.nativeValueToBlock(other.type, other.value), 0));
}
@Override
public String toString()
{
final StringBuilder sb = new StringBuilder("NullableValue{");
sb.append("type=").append(type);
sb.append(", value=").append(value);
sb.append('}');
return sb.toString();
}
public static class Serializable
{
private final Type type;
private final Block block;
@JsonCreator
public Serializable(
@JsonProperty("type") Type type,
@JsonProperty("block") Block block)
{
this.type = requireNonNull(type, "type is null");
this.block = block;
}
@JsonProperty
public Type getType()
{
return type;
}
@JsonProperty
public Block getBlock()
{
return block;
}
}
}
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