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Cattle framework cloud discovery common component pom

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/*
 * Copyright (C) 2018 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.cattleframework.cloud.discovery.enhancement.plugin;

import java.net.URI;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;

/**
 * 请求上下文
 * 
 * @author orange
 *
 */
public class RequestContext {

    private final URI url;

    private final HttpMethod httpMethod;

    private final HttpHeaders httpHeaders;

    private final Map parameters;

    public RequestContext(URI url, HttpMethod httpMethod, HttpHeaders httpHeaders, Map parameters) {
	this.url = url;
	this.httpMethod = httpMethod;
	this.httpHeaders = httpHeaders;
	this.parameters = parameters;
    }

    public HttpMethod getHttpMethod() {
	return httpMethod;
    }

    public HttpHeaders getHttpHeaders() {
	return httpHeaders;
    }

    public URI getUrl() {
	return url;
    }

    public String getParameter(String name) {
	return parameters != null ? parameters.get(name) : null;
    }

    public static ContextRequestBuilder builder() {
	return new ContextRequestBuilder();
    }

    public static final class ContextRequestBuilder {

	private HttpMethod httpMethod;

	private HttpHeaders httpHeaders;

	private URI url;

	private final Map parameters;

	private ContextRequestBuilder() {
	    parameters = new HashMap();
	}

	public ContextRequestBuilder httpMethod(HttpMethod httpMethod) {
	    this.httpMethod = httpMethod;
	    return this;
	}

	public ContextRequestBuilder httpHeaders(HttpHeaders httpHeaders) {
	    this.httpHeaders = httpHeaders;
	    return this;
	}

	public ContextRequestBuilder url(URI url) {
	    String query = url.getQuery();
	    if (StringUtils.isBlank(query)) {
		this.url = url;
	    } else {
		this.url = URI.create(
			String.format("%s://%s:%d%s", url.getScheme(), url.getHost(), url.getPort(), url.getPath()));
		String[] parameterArray = StringUtils.split(query, "&");
		Arrays.stream(parameterArray).forEach(parameter -> {
		    int pos = parameter.indexOf("=");
		    if (pos >= 0) {
			parameters.put(parameter.substring(0, pos), parameter.substring(pos + 1));
		    } else {
			parameters.put(parameter, "");
		    }
		});
	    }
	    return this;
	}

	public RequestContext build() {
	    return new RequestContext(url, httpMethod, httpHeaders, parameters);
	}
    }
}