/*
* 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.mapper;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterators;
import com.google.common.collect.UnmodifiableIterator;
import org.elasticsearch.index.mapper.object.ObjectMapper;
/**
* A holder for several {@link org.elasticsearch.index.mapper.object.ObjectMapper}.
*/
public class ObjectMappers implements Iterable<ObjectMapper> {
private final ImmutableList<ObjectMapper> objectMappers;
public ObjectMappers() {
this.objectMappers = ImmutableList.of();
}
public ObjectMappers(ObjectMapper objectMapper) {
this(new ObjectMapper[]{objectMapper});
}
public ObjectMappers(ObjectMapper[] objectMappers) {
if (objectMappers == null) {
objectMappers = new ObjectMapper[0];
}
this.objectMappers = ImmutableList.copyOf(Iterators.forArray(objectMappers));
}
public ObjectMappers(ImmutableList<ObjectMapper> objectMappers) {
this.objectMappers = objectMappers;
}
public ObjectMapper mapper() {
if (objectMappers.isEmpty()) {
return null;
}
return objectMappers.get(0);
}
public boolean isEmpty() {
return objectMappers.isEmpty();
}
public ImmutableList<ObjectMapper> mappers() {
return this.objectMappers;
}
@Override
public UnmodifiableIterator<ObjectMapper> iterator() {
return objectMappers.iterator();
}
/**
* Concats and returns a new {@link org.elasticsearch.index.mapper.ObjectMappers}.
*/
public ObjectMappers concat(ObjectMapper mapper) {
return new ObjectMappers(new ImmutableList.Builder<ObjectMapper>().addAll(objectMappers).add(mapper).build());
}
/**
* Concats and returns a new {@link org.elasticsearch.index.mapper.ObjectMappers}.
*/
public ObjectMappers concat(ObjectMappers mappers) {
return new ObjectMappers(new ImmutableList.Builder<ObjectMapper>().addAll(objectMappers).addAll(mappers).build());
}
public ObjectMappers remove(Iterable<ObjectMapper> mappers) {
ImmutableList.Builder<ObjectMapper> builder = new ImmutableList.Builder<ObjectMapper>();
for (ObjectMapper objectMapper : objectMappers) {
boolean found = false;
for (ObjectMapper mapper : mappers) {
if (objectMapper == mapper) { // identify equality
found = true;
}
}
if (!found) {
builder.add(objectMapper);
}
}
return new ObjectMappers(builder.build());
}
public ObjectMappers remove(ObjectMapper mapper) {
ImmutableList.Builder<ObjectMapper> builder = new ImmutableList.Builder<ObjectMapper>();
for (ObjectMapper objectMapper : objectMappers) {
if (objectMapper != mapper) { // identify equality
builder.add(objectMapper);
}
}
return new ObjectMappers(builder.build());
}
}