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CQL implementation for Achilles using Datastax Java driver
/*
* Copyright (C) 2012-2016 DuyHai DOAN
*
* 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 info.archinnov.achilles.internals.metamodel;
import static java.lang.String.format;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.function.Function;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.datastax.driver.core.DataType;
import com.datastax.driver.core.GettableData;
import com.datastax.driver.core.SettableData;
import com.datastax.driver.core.UDTValue;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.reflect.TypeToken;
import info.archinnov.achilles.internals.factory.TupleTypeFactory;
import info.archinnov.achilles.internals.factory.UserTypeFactory;
import info.archinnov.achilles.internals.metamodel.columns.ComputedColumnInfo;
import info.archinnov.achilles.internals.metamodel.columns.FieldInfo;
import info.archinnov.achilles.internals.types.RuntimeCodecWrapper;
import info.archinnov.achilles.type.codec.Codec;
import info.archinnov.achilles.type.codec.CodecSignature;
import info.archinnov.achilles.type.factory.BeanFactory;
import info.archinnov.achilles.validation.Validator;
public class ComputedProperty extends AbstractProperty {
private static final Logger LOGGER = LoggerFactory.getLogger(ComputedProperty.class);
public final ComputedColumnInfo computedColumnInfo;
private final Function extractor;
private final Codec valueCodec;
public ComputedProperty(FieldInfo fieldInfo, Function extractor, Codec valueCodec) {
super(fieldInfo);
this.valueFromTypeToken = new TypeToken(getClass()) {
};
this.valueToTypeToken = new TypeToken(getClass()) {
};
this.extractor = extractor;
this.valueCodec = valueCodec;
this.computedColumnInfo = (ComputedColumnInfo) fieldInfo.columnInfo;
}
@Override
boolean isOptional() {
return false;
}
@Override
public void encodeToSettable(VALUETO valueto, SettableData> settableData) {
throw new UnsupportedOperationException(format("Cannot set computed value to field '%s'", fieldInfo.fieldName));
}
@Override
VALUETO encodeFromJavaInternal(VALUEFROM javaValue) {
throw new UnsupportedOperationException(format("Cannot set computed value to field '%s'", fieldInfo.fieldName));
}
@Override
VALUETO encodeFromRawInternal(Object o) {
throw new UnsupportedOperationException(format("Cannot set computed value to field '%s'", fieldInfo.fieldName));
}
@Override
VALUEFROM decodeFromGettableInternal(GettableData gettableData) {
if (LOGGER.isTraceEnabled()) {
LOGGER.trace(format("Decode computed property %s from gettable data %s", this.toString(), gettableData));
}
return valueCodec.decode(extractor.apply(gettableData));
}
@Override
VALUEFROM decodeFromRawInternal(Object o) {
if (LOGGER.isTraceEnabled()) {
LOGGER.trace(format("Decode computed property %s from raw data %s", this.toString(), o));
}
final Class> cqlClass = computedColumnInfo.cqlClass;
Validator.validateTrue(cqlClass.isAssignableFrom(o.getClass()), "The class of object %s to decode should be %s", o, cqlClass.getCanonicalName());
return valueCodec.decode((VALUETO) o);
}
@Override
public DataType buildType() {
throw new UnsupportedOperationException(format("No type for computed field '%s'", fieldInfo.fieldName));
}
@Override
public String getColumnForSelect() {
return computedColumnInfo.alias;
}
@Override
public void encodeFieldToUdt(ENTITY entity, UDTValue udtValue) {
throw new UnsupportedOperationException(format("No UDT encoding for computed field '%s'", fieldInfo.fieldName));
}
@Override
public boolean containsUDTProperty() {
return false;
}
@Override
public List> getUDTClassProperties() {
return new ArrayList<>();
}
@Override
public void inject(UserTypeFactory userTypeFactory, TupleTypeFactory tupleTypeFactory) {
// No op
}
@Override
public void inject(ObjectMapper mapper) {
// No op
}
@Override
public void inject(BeanFactory factory) {
// No op
}
@Override
public void injectRuntimeCodecs(Map, Codec, ?>> runtimeCodecs) {
if (valueCodec instanceof RuntimeCodecWrapper) {
((RuntimeCodecWrapper)valueCodec).inject(runtimeCodecs);
}
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder("ComputedProperty{");
sb.append("computedColumnInfo=").append(computedColumnInfo);
sb.append('}');
return sb.toString();
}
@Override
public void injectKeyspace(String keyspace) {
// No op
}
}
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