com.github.ljtfreitas.restify.http.spring.contract.metadata.reflection.SpringWebRequestMappingMetadata.java Source code

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Here is the source code for com.github.ljtfreitas.restify.http.spring.contract.metadata.reflection.SpringWebRequestMappingMetadata.java

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/*******************************************************************************
 *
 * MIT License
 *
 * Copyright (c) 2016 Tiago de Freitas Lima
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 *******************************************************************************/
package com.github.ljtfreitas.restify.http.spring.contract.metadata.reflection;

import static com.github.ljtfreitas.restify.http.util.Preconditions.nonNull;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Optional;
import java.util.stream.Collectors;

import org.springframework.http.HttpHeaders;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

public class SpringWebRequestMappingMetadata {

    private final RequestMapping mapping;

    public SpringWebRequestMappingMetadata(RequestMapping mapping) {
        this.mapping = nonNull(mapping, "@RequestMapping cannot be null");
    }

    public Optional<String> path() {
        return Optional.ofNullable(mapping).map(m -> m.value()).filter(m -> m.length == 1).map(m -> m[0])
                .filter(p -> !p.isEmpty());
    }

    public RequestMethod[] method() {
        return mapping.method();
    }

    public String[] headers() {
        ArrayList<String> headers = new ArrayList<>();

        Collections.addAll(headers, mappedHeaders());

        consumes().ifPresent(c -> headers.add(c));
        produces().ifPresent(p -> headers.add(p));

        return headers.toArray(new String[0]);
    }

    private String[] mappedHeaders() {
        return Optional.ofNullable(mapping).map(m -> m.headers()).orElseGet(() -> new String[0]);
    }

    private Optional<String> produces() {
        return Optional.ofNullable(mapping).map(m -> m.produces()).filter(c -> c.length >= 1)
                .map(h -> Arrays.stream(h).filter(c -> c != null && !c.isEmpty()).collect(Collectors.joining(", ")))
                .map(c -> HttpHeaders.ACCEPT + "=" + c);
    }

    private Optional<String> consumes() {
        String[] produces = Optional.ofNullable(mapping).map(m -> m.consumes()).filter(p -> p.length <= 1)
                .orElseThrow(() -> new IllegalArgumentException(
                        "[consumes] parameter (of @RequestMapping annotation) " + "must have only single value."));

        return (produces.length == 0) ? Optional.empty()
                : Optional.ofNullable(produces[0]).filter(p -> !p.isEmpty())
                        .map(p -> HttpHeaders.CONTENT_TYPE + "=" + p);
    }

    @Override
    public String toString() {
        return mapping.toString();
    }
}