/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.ingest.common;
import org.elasticsearch.ingest.AbstractProcessor;
import org.elasticsearch.ingest.ConfigurationUtils;
import org.elasticsearch.ingest.IngestDocument;
import org.elasticsearch.ingest.Processor;
import org.elasticsearch.ingest.TemplateService;
import org.elasticsearch.ingest.ValueSource;
import java.util.Map;
/**
* Processor that appends value or values to existing lists. If the field is not present a new list holding the
* provided values will be added. If the field is a scalar it will be converted to a single item list and the provided
* values will be added to the newly created list.
*/
public final class AppendProcessor extends AbstractProcessor {
public static final String TYPE = "append";
private final TemplateService.Template field;
private final ValueSource value;
AppendProcessor(String tag, TemplateService.Template field, ValueSource value) {
super(tag);
this.field = field;
this.value = value;
}
public TemplateService.Template getField() {
return field;
}
public ValueSource getValue() {
return value;
}
@Override
public void execute(IngestDocument ingestDocument) throws Exception {
ingestDocument.appendFieldValue(field, value);
}
@Override
public String getType() {
return TYPE;
}
public static final class Factory implements Processor.Factory {
private final TemplateService templateService;
public Factory(TemplateService templateService) {
this.templateService = templateService;
}
@Override
public AppendProcessor create(Map<String, Processor.Factory> registry, String processorTag,
Map<String, Object> config) throws Exception {
String field = ConfigurationUtils.readStringProperty(TYPE, processorTag, config, "field");
Object value = ConfigurationUtils.readObject(TYPE, processorTag, config, "value");
TemplateService.Template compiledTemplate = ConfigurationUtils.compileTemplate(TYPE, processorTag,
"field", field, templateService);
return new AppendProcessor(processorTag, compiledTemplate, ValueSource.wrap(value, templateService));
}
}
}