Examples of org.restlet.data.Reference

org.restlet.data.Reference
; authority path-abempty ) | path-absolute | path-rootless | path-empty authority = [ user-info "@" ] host-domain [ ":" host-port ] relative-reference = relative-part [ "?" query ] [ "#" fragment ] relative-part = ( "//" authority path-abempty ) | path-absolute | path-noscheme | path-empty path-abempty = begins with "/" or is empty path-absolute = begins with "/" but not "//" path-noscheme = begins with a non-colon segment path-rootless = begins with a segment path-empty = zero characters
Note that this class doesn't encode or decode the reserved characters. It assumes that the URIs or the URI parts passed in are properly encoded using the standard URI encoding mechanism. You can use the static "encode()" and "decode()" methods for this purpose. Note that if an invalid URI character is detected by the constructor or one of the setters, a trace will be logged and the character will be automatically encoded.

The fundamental point to underline is the difference between an URI "reference" and an URI. Contrary to an URI (the target identifier of a REST resource), an URI reference can be relative (with or without query and fragment part). This relative URI reference can then be resolved against a base reference via the getTargetRef() method which will return a new resolved Reference instance, an absolute URI reference with no base reference and with no dot-segments (the path segments "." and "..").

You can also apply the getTargetRef() method on absolute references in order to solve the dot-segments. Note that applying the getRelativeRef() method on an absolute reference returns the current reference relatively to a base reference, if any, and solves the dot-segments.

The Reference stores its data as a single string, the one passed to the constructor. This string can always be obtained using the toString() method. A couple of integer indexes are maintained to improve the extraction time of various reference properties (URI components).

When you modify a specific component of the URI reference, via the setPath() method for example, the internal string is simply regenerated by updating only the relevant part. We try as much as possible to protect the bytes given to the Reference class instead of transparently parsing and normalizing the URI data. Our idea is to protect encodings and special characters in all case and reduce the memory size taken by this class while making Reference instances mutable.

Because the base reference is only a property of the Reference ("baseRef"). When you use the "Reference(base, path)" constructor, it is equivalent to doing:
ref = new Reference(path);
ref.setBaseRef(base);

The base ref is not automatically resolved or "merged" with the rest of the reference information (the path here). For example, this let's you reuse a single reference as the base of several relative references. If you modify the base reference, all relative references are still accurate.
Note that the name and value properties are thread safe, stored in volatile members. @author Jerome Louvel @see RFC 3986

                    ReferenceList rl = new ReferenceList();
                    rl.setIdentifier(request.getResourceRef());


                    for (String warEntry : warEntries) {
                        if (warEntry.startsWith(path)) {
                            rl.add(new Reference(warEntry));
                        }
                    }


                    response.setEntity(rl.getTextRepresentation());
                    response.setStatus(Status.SUCCESS_OK);

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            this.relativePart = this.relativePart.substring(1);
        }


        // The target uri does not take into account the query and fragment
        // parts of the resource.
        this.targetUri = new Reference(directory.getRootRef().toString()
                + this.relativePart).normalize().toString(false, false);
        if (!this.targetUri.startsWith(directory.getRootRef().toString())) {
            // Prevent the client from accessing resources in upper directories
            this.targetUri = directory.getRootRef().toString();
        }

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  void verifyAddStateModel() throws JsonGenerationException, JsonMappingException, IOException {
    String httpUrlBase =
        "http://localhost:" + ADMIN_PORT + "/clusters/" + clusterName
            + "/StateModelDefs/MasterSlave";
    Reference resourceRef = new Reference(httpUrlBase);
    Request request = new Request(Method.GET, resourceRef);
    Response response = _gClient.handle(request);
    Representation result = response.getEntity();
    StringWriter sw = new StringWriter();
    result.write(sw);
    ObjectMapper mapper = new ObjectMapper();
    ZNRecord zn = mapper.readValue(new StringReader(sw.toString()), ZNRecord.class);


    Map<String, String> paraMap = new HashMap<String, String>();


    paraMap.put(JsonParameters.MANAGEMENT_COMMAND, ClusterSetup.addStateModelDef);


    ZNRecord r = new ZNRecord("Test");
    r.merge(zn);


    httpUrlBase = "http://localhost:" + ADMIN_PORT + "/clusters/" + clusterName + "/StateModelDefs";
    resourceRef = new Reference(httpUrlBase);
    request = new Request(Method.POST, resourceRef);
    request.setEntity(
        JsonParameters.JSON_PARAMETERS + "=" + ClusterRepresentationUtil.ObjectToJson(paraMap)
            + "&" + JsonParameters.NEW_STATE_MODEL_DEF + "="
            + ClusterRepresentationUtil.ZNRecordToJson(r), MediaType.APPLICATION_ALL);

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    Map<String, String> paraMap = new HashMap<String, String>();


    paraMap.put(JsonParameters.CLUSTER_NAME, clusterName);
    paraMap.put(JsonParameters.MANAGEMENT_COMMAND, ClusterSetup.addCluster);


    Reference resourceRef = new Reference(httpUrlBase);


    Request request = new Request(Method.POST, resourceRef);


    request.setEntity(
        JsonParameters.JSON_PARAMETERS + "=" + ClusterRepresentationUtil.ObjectToJson(paraMap),

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    paraMap.put(JsonParameters.RESOURCE_GROUP_NAME, resourceGroupName);
    paraMap.put(JsonParameters.PARTITIONS, "" + partitions);
    paraMap.put(JsonParameters.STATE_MODEL_DEF_REF, "MasterSlave");
    paraMap.put(JsonParameters.MANAGEMENT_COMMAND, ClusterSetup.addResource);


    Reference resourceRef = new Reference(httpUrlBase);


    Request request = new Request(Method.POST, resourceRef);


    request.setEntity(
        JsonParameters.JSON_PARAMETERS + "=" + ClusterRepresentationUtil.ObjectToJson(paraMap),
        MediaType.APPLICATION_ALL);
    Response response = _gClient.handle(request);


    Representation result = response.getEntity();
    StringWriter sw = new StringWriter();
    result.write(sw);


    // System.out.println(sw.toString());


    ObjectMapper mapper = new ObjectMapper();
    ZNRecord zn = mapper.readValue(new StringReader(sw.toString()), ZNRecord.class);
    AssertJUnit.assertTrue(zn.getListField("ResourceGroups").contains(resourceGroupName));


    httpUrlBase =
        "http://localhost:" + ADMIN_PORT + "/clusters/" + clusterName + "/resourceGroups/"
            + resourceGroupName;
    resourceRef = new Reference(httpUrlBase);


    request = new Request(Method.GET, resourceRef);


    response = _gClient.handle(request);

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    Map<String, String> paraMap = new HashMap<String, String>();
    // Add 1 instance
    paraMap.put(JsonParameters.INSTANCE_NAME, instance1 + ":" + instancePort);
    paraMap.put(JsonParameters.MANAGEMENT_COMMAND, ClusterSetup.addInstance);


    Reference resourceRef = new Reference(httpUrlBase);


    Request request = new Request(Method.POST, resourceRef);


    request.setEntity(
        JsonParameters.JSON_PARAMETERS + "=" + ClusterRepresentationUtil.ObjectToJson(paraMap),

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    Map<String, String> paraMap = new HashMap<String, String>();
    // Add 1 instance
    paraMap.put(JsonParameters.REPLICAS, "" + replicas);
    paraMap.put(JsonParameters.MANAGEMENT_COMMAND, ClusterSetup.rebalance);


    Reference resourceRef = new Reference(httpUrlBase);


    Request request = new Request(Method.POST, resourceRef);


    request.setEntity(
        JsonParameters.JSON_PARAMETERS + "=" + ClusterRepresentationUtil.ObjectToJson(paraMap),
        MediaType.APPLICATION_ALL);
    Response response = _gClient.handle(request);


    Representation result = response.getEntity();
    StringWriter sw = new StringWriter();
    result.write(sw);


    // System.out.println(sw.toString());


    ObjectMapper mapper = new ObjectMapper();
    ZNRecord r = mapper.readValue(new StringReader(sw.toString()), ZNRecord.class);


    for (int i = 0; i < partitions; i++) {
      String partitionName = resourceGroupName + "_" + i;
      assert (r.getMapField(partitionName).size() == replicas);
    }


    httpUrlBase = "http://localhost:" + ADMIN_PORT + "/clusters/" + clusterName;
    resourceRef = new Reference(httpUrlBase);
    request = new Request(Method.GET, resourceRef);


    response = _gClient.handle(request);


    result = response.getEntity();

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    Map<String, String> paraMap = new HashMap<String, String>();
    // Add 1 instance
    paraMap.put(JsonParameters.ENABLED, "" + false);
    paraMap.put(JsonParameters.MANAGEMENT_COMMAND, ClusterSetup.enableInstance);


    Reference resourceRef = new Reference(httpUrlBase);


    Request request = new Request(Method.POST, resourceRef);


    request.setEntity(
        JsonParameters.JSON_PARAMETERS + "=" + ClusterRepresentationUtil.ObjectToJson(paraMap),

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  void verifyAlterIdealState() throws IOException {
    String httpUrlBase =
        "http://localhost:" + ADMIN_PORT + "/clusters/" + clusterName + "/resourceGroups/"
            + resourceGroupName + "/idealState";


    Reference resourceRef = new Reference(httpUrlBase);
    Request request = new Request(Method.GET, resourceRef);


    Response response = _gClient.handle(request);


    Representation result = response.getEntity();
    StringWriter sw = new StringWriter();
    result.write(sw);


    // System.out.println(sw.toString());


    ObjectMapper mapper = new ObjectMapper();
    ZNRecord r = mapper.readValue(new StringReader(sw.toString()), ZNRecord.class);
    String partitionName = "new-entity-12345_3";
    r.getMapFields().remove(partitionName);


    Map<String, String> paraMap = new HashMap<String, String>();
    // Add 1 instance
    paraMap.put(JsonParameters.MANAGEMENT_COMMAND, ClusterSetup.addIdealState);


    resourceRef = new Reference(httpUrlBase);


    request = new Request(Method.POST, resourceRef);
    request.setEntity(
        JsonParameters.JSON_PARAMETERS + "=" + ClusterRepresentationUtil.ObjectToJson(paraMap)
            + "&" + JsonParameters.NEW_IDEAL_STATE + "="

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    Assert.assertTrue(contains(record.getListField("PARTITION"), "testPartition"));


  }


  private ZNRecord get(Client client, String url, ObjectMapper mapper) throws Exception {
    Request request = new Request(Method.GET, new Reference(url));
    Response response = client.handle(request);
    Representation result = response.getEntity();
    StringWriter sw = new StringWriter();
    result.write(sw);
    String responseStr = sw.toString();

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