/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.
*/
package org.apache.drill.exec.ref.values;
import org.apache.drill.common.exceptions.DrillRuntimeException;
import org.apache.drill.common.expression.PathSegment;
public abstract class BaseDataValue implements DataValue{
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(BaseDataValue.class);
@Override
public DataValue getValue(PathSegment segment) {
if(segment == null){
return this;
}else{ // looking for a lower level value when there is none.
return DataValue.NULL_VALUE;
}
}
public void addValue(PathSegment segment, DataValue v) {
throw new IllegalArgumentException("You can't add a value to a non-container type.");
}
public void removeValue(PathSegment segment) {
throw new IllegalArgumentException("You can't remove a value from a non-container type.");
}
@Override
public NumericValue getAsNumeric() {
throw new DrillRuntimeException(String.format("A %s value is not a NumericValue.", this.getClass().getCanonicalName()));
}
@Override
public ContainerValue getAsContainer() {
throw new DrillRuntimeException(String.format("A %s value is not a ContainerValue.", this.getClass().getCanonicalName()));
}
@Override
public StringValue getAsStringValue() {
throw new DrillRuntimeException(String.format("A %s value is not a StringValue.", this.getClass().getCanonicalName()));
}
public BytesValue getAsBytesValue(){
throw new DrillRuntimeException(String.format("A %s value is not a BytesValue.", this.getClass().getCanonicalName()));
}
public BooleanValue getAsBooleanValue(){
throw new DrillRuntimeException(String.format("A %s value is not a BooleanValue.", this.getClass().getCanonicalName()));
}
@Override
public abstract int hashCode();
@Override
public boolean equals(Object obj) {
if(obj instanceof DataValue){
return this.equals((DataValue) obj);
}else{
return false;
}
}
@Override
public abstract DataValue copy();
}