| /* |
| * 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.io.UncheckedIOException; |
| import java.time.Instant; |
| import java.time.LocalDateTime; |
| import java.time.ZoneOffset; |
| import java.time.format.DateTimeParseException; |
| import java.time.temporal.TemporalAccessor; |
| import java.time.temporal.UnsupportedTemporalTypeException; |
| import java.util.Date; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.stream.Collectors; |
| |
| import org.apache.solr.client.solrj.io.stream.expr.StreamExpression; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamFactory; |
| |
| public abstract class RecursiveTemporalEvaluator extends RecursiveEvaluator implements OneValueWorker { |
| protected static final long serialVersionUID = 1L; |
| |
| private String functionName; |
| |
| public RecursiveTemporalEvaluator(StreamExpression expression, StreamFactory factory, String functionName) throws IOException{ |
| super(expression, factory); |
| this.functionName = functionName; |
| |
| if(1 != containedEvaluators.size()){ |
| throw new IOException(String.format(Locale.ROOT,"Invalid expression %s - expecting one value but found %d",expression,containedEvaluators.size())); |
| } |
| } |
| |
| public String getFunction() { |
| return functionName; |
| } |
| |
| protected abstract Object getDatePart(TemporalAccessor value); |
| |
| public Object normalizeInputType(Object value) throws StreamEvaluatorException { |
| if(null == value){ |
| return value; |
| } |
| |
| // There is potential for various types to be coming in which are valid temporal values. |
| // The order in which we check these types is actually somewhat critical in how we handle them. |
| |
| if(value instanceof Instant){ |
| // Convert to LocalDateTime at UTC |
| return LocalDateTime.ofInstant((Instant)value, ZoneOffset.UTC); |
| } |
| else if(value instanceof TemporalAccessor){ |
| // Any other TemporalAccessor can just be returned |
| return value; |
| } |
| else if(value instanceof Long){ |
| // Convert to Instant and recurse in |
| return normalizeInputType(Instant.ofEpochMilli((Long)value)); |
| } |
| else if(value instanceof Date){ |
| // Convert to Instant and recurse in |
| return normalizeInputType(((Date)value).toInstant()); |
| } |
| else if(value instanceof String){ |
| String valueStr = (String)value; |
| if (!valueStr.isEmpty()) { |
| try { |
| // Convert to Instant and recurse in |
| return normalizeInputType(Instant.parse(valueStr)); |
| } catch (DateTimeParseException e) { |
| throw new UncheckedIOException(new IOException(String.format(Locale.ROOT, "Invalid parameter %s - The String must be formatted in the ISO_INSTANT date format.", valueStr))); |
| } |
| } |
| } |
| else if(value instanceof List){ |
| // for each list value, recurse in |
| return ((List<?>)value).stream().map(innerValue -> normalizeInputType(innerValue)).collect(Collectors.toList()); |
| } |
| |
| throw new UncheckedIOException(new IOException(String.format(Locale.ROOT, "Invalid parameter %s - The parameter must be a string formatted ISO_INSTANT or of type Long,Instant,Date,LocalDateTime or TemporalAccessor.", String.valueOf(value)))); |
| } |
| |
| public Object doWork(Object value) { |
| if(null == value){ |
| return null; |
| } |
| else if(value instanceof List<?>){ |
| return ((List<?>)value).stream().map(innerValue -> doWork(innerValue)).collect(Collectors.toList()); |
| } |
| else{ |
| // We know it's an Instant |
| try { |
| return getDatePart((TemporalAccessor)value); |
| } catch (UnsupportedTemporalTypeException utte) { |
| throw new UncheckedIOException(new IOException(String.format(Locale.ROOT, "It is not possible to call '%s' function on %s", getFunction(), value.getClass().getName()))); |
| } |
| } |
| } |
| } |