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Elasticsearch subproject :server
/*
* 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.index.mapper;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
/**
* A holder for several {@link FieldMapper}.
*/
public class FieldMappers implements Iterable {
private final FieldMapper[] fieldMappers;
private final List fieldMappersAsList;
public FieldMappers() {
this.fieldMappers = new FieldMapper[0];
this.fieldMappersAsList = Arrays.asList(fieldMappers);
}
public FieldMappers(FieldMapper fieldMapper) {
this.fieldMappers = new FieldMapper[]{fieldMapper};
this.fieldMappersAsList = Arrays.asList(this.fieldMappers);
}
private FieldMappers(FieldMapper[] fieldMappers) {
this.fieldMappers = fieldMappers;
this.fieldMappersAsList = Arrays.asList(this.fieldMappers);
}
public FieldMapper mapper() {
if (fieldMappers.length == 0) {
return null;
}
return fieldMappers[0];
}
public boolean isEmpty() {
return fieldMappers.length == 0;
}
public List mappers() {
return this.fieldMappersAsList;
}
@Override
public Iterator iterator() {
return fieldMappersAsList.iterator();
}
/**
* Concats and returns a new {@link FieldMappers}.
*/
public FieldMappers concat(FieldMapper mapper) {
FieldMapper[] newMappers = new FieldMapper[fieldMappers.length + 1];
System.arraycopy(fieldMappers, 0, newMappers, 0, fieldMappers.length);
newMappers[fieldMappers.length] = mapper;
return new FieldMappers(newMappers);
}
public FieldMappers remove(FieldMapper mapper) {
ArrayList list = new ArrayList<>(fieldMappers.length);
for (FieldMapper fieldMapper : fieldMappers) {
if (!fieldMapper.equals(mapper)) { // identify equality
list.add(fieldMapper);
}
}
return new FieldMappers(list.toArray(new FieldMapper[list.size()]));
}
}