/*
* Copyright 2012-2014 the original author or authors.
*
* Licensed 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.springframework.data.domain.jaxb;
import java.util.Collections;
import javax.xml.bind.annotation.adapters.XmlAdapter;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.domain.jaxb.SpringDataJaxb.OrderDto;
import org.springframework.data.domain.jaxb.SpringDataJaxb.PageRequestDto;
import org.springframework.data.domain.jaxb.SpringDataJaxb.SortDto;
/**
* {@link XmlAdapter} to convert {@link Pageable} instances int a {@link PageRequestDto} and vice versa.
*
* @author Oliver Gierke
*/
class PageableAdapter extends XmlAdapter<PageRequestDto, Pageable> {
/*
* (non-Javadoc)
* @see javax.xml.bind.annotation.adapters.XmlAdapter#marshal(java.lang.Object)
*/
@Override
public PageRequestDto marshal(Pageable request) {
SortDto sortDto = SortAdapter.INSTANCE.marshal(request.getSort());
PageRequestDto dto = new PageRequestDto();
dto.orders = sortDto == null ? Collections.<OrderDto> emptyList() : sortDto.orders;
dto.page = request.getPageNumber();
dto.size = request.getPageSize();
return dto;
}
/*
* (non-Javadoc)
* @see javax.xml.bind.annotation.adapters.XmlAdapter#unmarshal(java.lang.Object)
*/
@Override
public Pageable unmarshal(PageRequestDto v) {
if (v.orders.isEmpty()) {
return new PageRequest(v.page, v.size);
}
SortDto sortDto = new SortDto();
sortDto.orders = v.orders;
Sort sort = SortAdapter.INSTANCE.unmarshal(sortDto);
return new PageRequest(v.page, v.size, sort);
}
}