/*
* Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. Crate licenses
* this file to you 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial agreement.
*/
package io.crate.planner.symbol;
import com.google.common.base.Objects;
import com.google.common.base.Preconditions;
import io.crate.metadata.ReferenceInfo;
import io.crate.types.DataType;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import java.io.IOException;
public class Reference extends DataTypeSymbol {
public static final SymbolFactory<Reference> FACTORY = new SymbolFactory<Reference>() {
@Override
public Reference newInstance() {
return new Reference();
}
};
protected ReferenceInfo info;
public Reference(ReferenceInfo info) {
Preconditions.checkArgument(info!=null, "Info is null");
this.info = info;
}
public Reference() {
}
public ReferenceInfo info() {
return info;
}
@Override
public SymbolType symbolType() {
return SymbolType.REFERENCE;
}
@Override
public DataType valueType() {
return info().type();
}
@Override
public String toString() {
return Objects.toStringHelper(this)
.add("info", info())
.toString();
}
@Override
public <C, R> R accept(SymbolVisitor<C, R> visitor, C context) {
return visitor.visitReference(this, context);
}
@Override
public void readFrom(StreamInput in) throws IOException {
info = new ReferenceInfo();
info.readFrom(in);
}
@Override
public void writeTo(StreamOutput out) throws IOException {
info().writeTo(out);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if ((obj == null) || (getClass() != obj.getClass())) {
return false;
}
Reference o = (Reference) obj;
return Objects.equal(info().ident(), o.info().ident());
}
@Override
public int hashCode() {
return info().hashCode();
}
}