org.elasticsearch.index.fieldvisitor.CustomFieldsVisitor Maven / Gradle / Ivy
/*
* Licensed to ElasticSearch and Shay Banon 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.index.fieldvisitor;
import org.apache.lucene.index.FieldInfo;
import org.elasticsearch.index.mapper.internal.SourceFieldMapper;
import org.elasticsearch.index.mapper.internal.UidFieldMapper;
import java.io.IOException;
import java.util.Set;
/**
*/
public class CustomFieldsVisitor extends FieldsVisitor {
private final boolean loadAllFields;
private final boolean loadSource;
private final Set fields;
public CustomFieldsVisitor(Set fields, boolean loadSource) {
this.loadAllFields = false;
this.loadSource = loadSource;
this.fields = fields;
}
public CustomFieldsVisitor(boolean loadAllFields, boolean loadSource) {
this.loadAllFields = loadAllFields;
this.loadSource = loadSource;
this.fields = null;
}
@Override
public Status needsField(FieldInfo fieldInfo) throws IOException {
if (loadAllFields) {
return Status.YES;
}
if (loadSource && SourceFieldMapper.NAME.equals(fieldInfo.name)) {
return Status.YES;
}
if (UidFieldMapper.NAME.equals(fieldInfo.name)) {
return Status.YES;
}
return fields.contains(fieldInfo.name) ? Status.YES : Status.NO;
}
}