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/// @startDocuBlock REST_DOCUMENT_READ_ALL
/// @brief reads all documents from collection
///
/// @RESTHEADER{GET /_api/document/{collection},Read all documents}
///
/// @RESTQUERYPARAMETERS
///
/// @RESTQUERYPARAM{collection,string,optional}
/// The name of the collection. This is only for backward compatibility.
/// In ArangoDB versions < 3.0, the URL path was */_api/document* and
/// this query parameter was required. This combination still works, but
/// the recommended way is to specify the collection in the URL path.
///
/// @RESTQUERYPARAM{type,string,optional}
/// The type of the result. The following values are allowed:
///
///   - *id*: returns an array of document ids (*_id* attributes)
///   - *key*: returns an array of document keys (*_key* attributes)
///   - *path*: returns an array of document URI paths. This is the default.
///
/// @RESTDESCRIPTION
/// Returns an array of all keys, ids, or URI paths for all documents in the
/// collection identified by *collection*. The type of the result array is
/// determined by the *type* attribute.
///
/// Note that the results have no defined order and thus the order should
/// not be relied on.
///
/// @RESTRETURNCODES
///
/// @RESTRETURNCODE{200}
/// All went well.
///
/// @RESTRETURNCODE{404}
/// The collection does not exist.
///
/// @EXAMPLES
///
/// Return all document paths
///
/// @EXAMPLE_ARANGOSH_RUN{RestDocumentHandlerReadDocumentAllPath}
///     var cn = "products";
///     db._drop(cn);
///     db._create(cn);
///
///     db.products.save({"hello1":"world1"});
///     db.products.save({"hello2":"world1"});
///     db.products.save({"hello3":"world1"});
///     var url = "/_api/document/" + cn;
///
///     var response = logCurlRequest('GET', url);
///
///     assert(response.code === 200);
///
///     logJsonResponse(response);
///   ~ db._drop(cn);
/// @END_EXAMPLE_ARANGOSH_RUN
///
/// Return all document keys
///
/// @EXAMPLE_ARANGOSH_RUN{RestDocumentHandlerReadDocumentAllKey}
///     var cn = "products";
///     db._drop(cn);
///     db._create(cn);
///
///     db.products.save({"hello1":"world1"});
///     db.products.save({"hello2":"world1"});
///     db.products.save({"hello3":"world1"});
///     var url = "/_api/document/" + cn + "&type=key";
///
///     var response = logCurlRequest('GET', url);
///
///     assert(response.code === 200);
///
///     logJsonResponse(response);
///   ~ db._drop(cn);
/// @END_EXAMPLE_ARANGOSH_RUN
///
/// Collection does not exist
///
/// @EXAMPLE_ARANGOSH_RUN{RestDocumentHandlerReadDocumentAllCollectionDoesNotExist}
///     var cn = "doesnotexist";
///     db._drop(cn);
///     var url = "/_api/document/" + cn;
///
///     var response = logCurlRequest('GET', url);
///
///     assert(response.code === 404);
///
///     logJsonResponse(response);
/// @END_EXAMPLE_ARANGOSH_RUN
/// @endDocuBlock
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