    001// Copyright 2021 The Apache Software Foundation
    002//
    003// Licensed under the Apache License, Version 2.0 (the "License");
    004// you may not use this file except in compliance with the License.
    005// You may obtain a copy of the License at
    006//
    007//     http://www.apache.org/licenses/LICENSE-2.0
    008//
    009// Unless required by applicable law or agreed to in writing, software
    010// distributed under the License is distributed on an "AS IS" BASIS,
    011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012// See the License for the specific language governing permissions and
    013// limitations under the License.
    014package org.apache.tapestry5.http.internal.services;
    015
    016import java.util.Optional;
    017
    018import javax.servlet.http.HttpServletRequest;
    019
    020import org.apache.tapestry5.http.services.HttpRequestBodyConverter;
    021import org.apache.tapestry5.http.services.RestSupport;
    022
    023/**
    024 * Default {@linkplain RestSupport} implementation.
    025 */
    026public class RestSupportImpl implements RestSupport
    027{
    028
    029    final private HttpServletRequest request;
    030
    031    final private HttpRequestBodyConverter converter;
    032
    033    public RestSupportImpl(final HttpServletRequest request, final HttpRequestBodyConverter converter)
    034    {
    035        super();
    036        this.request = request;
    037        this.converter = converter;
    038    }
    039
    040    @Override
    041    public boolean isHttpGet()
    042    {
    043        return isMethod("GET");
    044    }
    045
    046    @Override
    047    public boolean isHttpPost()
    048    {
    049        return isMethod("POST");
    050    }
    051
    052    @Override
    053    public boolean isHttpHead()
    054    {
    055        return isMethod("HEAD");
    056    }
    057
    058    @Override
    059    public boolean isHttpPut()
    060    {
    061        return isMethod("PUT");
    062    }
    063
    064    @Override
    065    public boolean isHttpDelete()
    066    {
    067        return isMethod("DELETE");
    068    }
    069
    070    @Override
    071    public boolean isHttpPatch()
    072    {
    073        return isMethod("PATCH");
    074    }
    075
    076    private boolean isMethod(String string)
    077    {
    078        return request.getMethod().equals(string);
    079    }
    080
    081    @Override
    082    public <T> Optional<T> getRequestBodyAs(Class<T> type)
    083    {
    084        return Optional.ofNullable(converter.convert(request, type));
    085    }
    086
    087}