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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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 com.aliyun.datahub.rest;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

/**
 * 用来构造RESTful API调用的资源标识符
 */
public class ResourceBuilder {

    public static final String PROJECTS = "/projects";
    public static final String TABLES = "/tables";
    public static final String REGISTRATION = "/registration";
    public static final String FUNCTIONS = "/functions";
    public static final String EVENTS = "/events";
    public static final String RESOURCES = "/resources";
    public static final String INSTANCES = "/instances";
    public static final String VOLUMES = "/volumes";
    private static final String STREAMS = "/streams";
    private static final String TOPOLOGIES = "/topologies";
    private static final String XFLOWS = "/xflows";
    private static final String STREAMJOBS = "/streamjobs";
    private static final String MATRICES = "/matrices";
    private static final String SHIPPER = "/shippers";
    private static final String OFFLINEMODELS = "/offlinemodels";

    public static String buildProjectsResource() {
        return PROJECTS;
    }

    public static String buildProjectResource(String projectName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName));

        return sb.toString();
    }

    public static String buildTablesResource(String projectName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName)).append(TABLES);

        return sb.toString();
    }

    public static String buildTableResource(String projectName, String tableName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName));
        sb.append(TABLES).append('/').append(encodeObjectName(tableName));

        return sb.toString();
    }

    public static String buildFunctionsResource(String projectName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName)).append(REGISTRATION)
                .append(FUNCTIONS);

        return sb.toString();
    }

    public static String buildFunctionResource(String projectName, String functionName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName));
        sb.append(REGISTRATION).append(FUNCTIONS).append('/').append(encodeObjectName(functionName));

        return sb.toString();
    }

    public static String buildXFlowsResource(String projectName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName)).append(XFLOWS);

        return sb.toString();
    }

    public static String buildXFlowResource(String projectName, String xFlowName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName));
        sb.append(XFLOWS).append('/').append(encodeObjectName(xFlowName));

        return sb.toString();
    }

    public static String buildInstancesResource(String projectName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName)).append(INSTANCES);

        return sb.toString();
    }

    public static String buildInstanceResource(String projectName, String instanceId) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName));
        sb.append(INSTANCES).append('/').append(encodeObjectName(instanceId));

        return sb.toString();
    }

    public static String buildResourcesResource(String projectName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName)).append(RESOURCES);

        return sb.toString();
    }

    public static String buildResourceResource(String projectName, String resourceName) {

        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName));
        sb.append(RESOURCES).append('/').append(encodeObjectName(resourceName));

        return sb.toString();
    }

    public static String buildVolumesResource(String projectName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName)).append(VOLUMES);

        return sb.toString();
    }

    public static String buildVolumeResource(String projectName, String volumeName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName));
        sb.append(VOLUMES).append('/').append(encodeObjectName(volumeName));

        return sb.toString();
    }

    public static String buildStreamsResource(String projectName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName)).append(STREAMS);

        return sb.toString();
    }

    public static String buildStreamResource(String projectName, String streamName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName));
        sb.append(STREAMS).append('/').append(encodeObjectName(streamName));

        return sb.toString();
    }

    public static String buildTopologiesResource(String projectName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName)).append(TOPOLOGIES);

        return sb.toString();
    }

    public static String buildTopologyResource(String projectName, String topologyName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName));
        sb.append(TOPOLOGIES).append('/').append(encodeObjectName(topologyName));

        return sb.toString();
    }

    public static String buildStreamJobsResource(String projectName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName)).append(STREAMJOBS);

        return sb.toString();
    }

    public static String buildStreamJobResource(String projectName, String streamJobName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName));
        sb.append(STREAMJOBS).append('/').append(encodeObjectName(streamJobName));

        return sb.toString();
    }

    public static String buildVolumePartitionResource(String projectName, String volumeName,
                                                      String partitionName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName));
        sb.append(VOLUMES).append('/').append(encodeObjectName(volumeName));
        sb.append('/').append(partitionName);

        return sb.toString();
    }

    public static String encodeObjectName(String name) {
        if (name == null || name.trim().length() != name.length()) {
            throw new IllegalArgumentException("Invalid name: " + name);
        }

        return encode(name);
    }

    public static String encode(String str) {
        if (str == null || str.length() == 0) {
            return str;
        }

        String r = null;
        try {
            r = URLEncoder.encode(str, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw new IllegalArgumentException("Encode failed: " + str);
        }
        r = r.replaceAll("\\+", "%20");
        return r;
    }

    public static String buildEventsResource(String projectName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName)).append(REGISTRATION)
                .append(EVENTS);

        return sb.toString();
    }

    public static String buildEventResource(String projectName, String eventName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName));
        sb.append(REGISTRATION).append(EVENTS).append('/').append(encodeObjectName(eventName));

        return sb.toString();
    }

    public static String buildOfflineModelResource(String projectName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName))
                .append(OFFLINEMODELS);

        return sb.toString();
    }

    public static String buildOfflineModelResource(String projectName,
                                                   String modelName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName))
                .append(OFFLINEMODELS).append("/").append(modelName);

        return sb.toString();
    }

    public static String buildMatrixResource(String projectName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName))
                .append(MATRICES);

        return sb.toString();
    }

    public static String buildMatrixResource(String projectName, String maxtrixName) {
        StringBuilder sb = new StringBuilder();

        sb.append(PROJECTS).append('/').append(encodeObjectName(projectName))
                .append(MATRICES).append("/").append(maxtrixName);

        return sb.toString();
    }

    public static String buildShipperResource() {
        return SHIPPER;
    }

    public static String buildShipperResource(long jobId) {
        return SHIPPER + "/" + jobId;
    }
}