/*
* 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.solr.client.solrj.io.eval;
import java.io.IOException;
import java.math.BigDecimal;
import java.util.List;
import java.util.Locale;
import java.util.stream.Collectors;
import org.apache.solr.client.solrj.io.Tuple;
import org.apache.solr.client.solrj.io.stream.expr.StreamExpression;
import org.apache.solr.client.solrj.io.stream.expr.StreamFactory;
public class EqualsEvaluator extends BooleanEvaluator {
protected static final long serialVersionUID = 1L;
public EqualsEvaluator(StreamExpression expression, StreamFactory factory) throws IOException{
super(expression, factory);
if(subEvaluators.size() < 2){
throw new IOException(String.format(Locale.ROOT,"Invalid expression %s - expecting at least two values but found %d",expression,subEvaluators.size()));
}
}
@Override
public Boolean evaluate(Tuple tuple) throws IOException {
List<Object> results = evaluateAll(tuple);
if(results.size() < 2){
String message = null;
if(1 == results.size()){
message = String.format(Locale.ROOT,"%s(...) only works with at least 2 values but 1 was provided", constructingFactory.getFunctionName(getClass()));
}
else{
message = String.format(Locale.ROOT,"%s(...) only works with at least 2 values but 0 were provided", constructingFactory.getFunctionName(getClass()));
}
throw new IOException(message);
}
Checker checker = constructChecker(results.get(0));
if(results.stream().anyMatch(result -> null == result && !checker.isNullAllowed())){
return false;
}
if(results.stream().anyMatch(result -> !checker.isCorrectType(result))){
throw new IOException(String.format(Locale.ROOT,"Unable to check %s(...) of differing types [%s]", constructingFactory.getFunctionName(getClass()), results.stream().map(item -> item.getClass().getSimpleName()).collect(Collectors.joining(","))));
}
for(int idx = 1; idx < results.size(); ++idx){
if(!checker.test(results.get(0), results.get(idx))){
return false;
}
}
return true;
}
private Checker constructChecker(Object fromValue) throws IOException{
if(null == fromValue){
return new NullChecker() {
@Override
public boolean test(Object left, Object right) {
return null == left && null == right;
}
};
}
else if(fromValue instanceof Boolean){
return new BooleanChecker(){
@Override
public boolean test(Object left, Object right) {
return (boolean)left == (boolean)right;
}
};
}
else if(fromValue instanceof Number){
return new NumberChecker(){
@Override
public boolean test(Object left, Object right) {
return 0 == (new BigDecimal(left.toString())).compareTo(new BigDecimal(right.toString()));
}
};
}
else if(fromValue instanceof String){
return new StringChecker(){
@Override
public boolean test(Object left, Object right) {
return left.equals(right);
}
};
}
throw new IOException(String.format(Locale.ROOT,"Unable to check %s(...) for values of type '%s'", constructingFactory.getFunctionName(getClass()), fromValue.getClass().getSimpleName()));
}
}