restconf/restconf-nb/src/main/java/org/opendaylight/restconf/nb/rfc8040/databind/jaxrs/QueryParams.java

   1 /*
   2  * Copyright (c) 2021 PANTHEON.tech, s.r.o. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.restconf.nb.rfc8040.databind.jaxrs;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.annotations.Beta;
  13 import com.google.common.annotations.VisibleForTesting;
  14 import java.util.List;
  15 import java.util.Map.Entry;
  16 import java.util.Set;
  17 import java.util.function.Function;
  18 import javax.ws.rs.core.UriInfo;
  19 import org.eclipse.jdt.annotation.NonNull;
  20 import org.eclipse.jdt.annotation.Nullable;
  21 import org.opendaylight.restconf.api.query.ChangedLeafNodesOnlyParam;
  22 import org.opendaylight.restconf.api.query.ContentParam;
  23 import org.opendaylight.restconf.api.query.DepthParam;
  24 import org.opendaylight.restconf.api.query.FieldsParam;
  25 import org.opendaylight.restconf.api.query.FilterParam;
  26 import org.opendaylight.restconf.api.query.InsertParam;
  27 import org.opendaylight.restconf.api.query.LeafNodesOnlyParam;
  28 import org.opendaylight.restconf.api.query.PointParam;
  29 import org.opendaylight.restconf.api.query.PrettyPrintParam;
  30 import org.opendaylight.restconf.api.query.SkipNotificationDataParam;
  31 import org.opendaylight.restconf.api.query.StartTimeParam;
  32 import org.opendaylight.restconf.api.query.StopTimeParam;
  33 import org.opendaylight.restconf.api.query.WithDefaultsParam;
  34 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
  35 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
  36 import org.opendaylight.restconf.common.errors.RestconfError;
  37 import org.opendaylight.restconf.nb.rfc8040.NotificationQueryParams;
  38 import org.opendaylight.restconf.nb.rfc8040.ReadDataParams;
  39 import org.opendaylight.restconf.nb.rfc8040.WriteDataParams;
  40 import org.opendaylight.restconf.nb.rfc8040.legacy.QueryParameters;
  41 import org.opendaylight.restconf.nb.rfc8040.utils.parser.NetconfFieldsTranslator;
  42 import org.opendaylight.restconf.nb.rfc8040.utils.parser.WriterFieldsTranslator;
  43 import org.opendaylight.yangtools.yang.common.ErrorTag;
  44 import org.opendaylight.yangtools.yang.common.ErrorType;
  45
  46 @Beta
  47 public final class QueryParams {
  48     private static final Set<String> KNOWN_PARAMS = Set.of(
  49         // Read data
  50         ContentParam.uriName, DepthParam.uriName, FieldsParam.uriName, WithDefaultsParam.uriName,
  51         PrettyPrintParam.uriName,
  52         // Modify data
  53         InsertParam.uriName, PointParam.uriName,
  54         // Notifications
  55         FilterParam.uriName, StartTimeParam.uriName, StopTimeParam.uriName,
  56         LeafNodesOnlyParam.uriName, SkipNotificationDataParam.uriName, ChangedLeafNodesOnlyParam.uriName);
  57
  58     private QueryParams() {
  59         // Utility class
  60     }
  61
  62     public static @NonNull NotificationQueryParams newNotificationQueryParams(final UriInfo uriInfo) {
  63         StartTimeParam startTime = null;
  64         StopTimeParam stopTime = null;
  65         FilterParam filter = null;
  66         LeafNodesOnlyParam leafNodesOnly = null;
  67         SkipNotificationDataParam skipNotificationData = null;
  68         ChangedLeafNodesOnlyParam changedLeafNodesOnly = null;
  69
  70         for (Entry<String, List<String>> entry : uriInfo.getQueryParameters().entrySet()) {
  71             final String paramName = entry.getKey();
  72             final List<String> paramValues = entry.getValue();
  73
  74             try {
  75                 switch (paramName) {
  76                     case FilterParam.uriName:
  77                         filter = optionalParam(FilterParam::forUriValue, paramName, paramValues);
  78                         break;
  79                     case StartTimeParam.uriName:
  80                         startTime = optionalParam(StartTimeParam::forUriValue, paramName, paramValues);
  81                         break;
  82                     case StopTimeParam.uriName:
  83                         stopTime = optionalParam(StopTimeParam::forUriValue, paramName, paramValues);
  84                         break;
  85                     case LeafNodesOnlyParam.uriName:
  86                         leafNodesOnly = optionalParam(LeafNodesOnlyParam::forUriValue, paramName, paramValues);
  87                         break;
  88                     case SkipNotificationDataParam.uriName:
  89                         skipNotificationData = optionalParam(SkipNotificationDataParam::forUriValue, paramName,
  90                             paramValues);
  91                         break;
  92                     case ChangedLeafNodesOnlyParam.uriName:
  93                         changedLeafNodesOnly = optionalParam(ChangedLeafNodesOnlyParam::forUriValue, paramName,
  94                             paramValues);
  95                         break;
  96                     default:
  97                         throw unhandledParam("notification", paramName);
  98                 }
  99             } catch (IllegalArgumentException e) {
 100                 throw new RestconfDocumentedException("Invalid " + paramName + " value: " + e.getMessage(),
 101                     ErrorType.PROTOCOL, ErrorTag.INVALID_VALUE, e);
 102             }
 103         }
 104
 105         try {
 106             return NotificationQueryParams.of(startTime, stopTime, filter, leafNodesOnly, skipNotificationData,
 107                     changedLeafNodesOnly);
 108         } catch (IllegalArgumentException e) {
 109             throw new RestconfDocumentedException("Invalid query parameters: " + e.getMessage(), e);
 110         }
 111     }
 112
 113     public static QueryParameters newQueryParameters(final ReadDataParams params,
 114             final InstanceIdentifierContext identifier) {
 115         final var fields = params.fields();
 116         if (fields == null) {
 117             return QueryParameters.of(params);
 118         }
 119
 120         return identifier.getMountPoint() != null
 121             ? QueryParameters.ofFieldPaths(params, NetconfFieldsTranslator.translate(identifier, fields))
 122                 : QueryParameters.ofFields(params, WriterFieldsTranslator.translate(identifier, fields));
 123     }
 124
 125     /**
 126      * Parse parameters from URI request and check their types and values.
 127      *
 128      * @param uriInfo    URI info
 129      * @return {@link ReadDataParams}
 130      */
 131     public static @NonNull ReadDataParams newReadDataParams(final UriInfo uriInfo) {
 132         ContentParam content = ContentParam.ALL;
 133         DepthParam depth = null;
 134         FieldsParam fields = null;
 135         WithDefaultsParam withDefaults = null;
 136         PrettyPrintParam prettyPrint = null;
 137
 138         for (Entry<String, List<String>> entry : uriInfo.getQueryParameters().entrySet()) {
 139             final String paramName = entry.getKey();
 140             final List<String> paramValues = entry.getValue();
 141
 142             try {
 143                 switch (paramName) {
 144                     case ContentParam.uriName:
 145                         content = optionalParam(ContentParam::forUriValue, paramName, paramValues);
 146                         break;
 147                     case DepthParam.uriName:
 148                         final String depthStr = optionalParam(paramName, paramValues);
 149                         try {
 150                             depth = DepthParam.forUriValue(depthStr);
 151                         } catch (IllegalArgumentException e) {
 152                             throw new RestconfDocumentedException(e, new RestconfError(ErrorType.PROTOCOL,
 153                                 ErrorTag.INVALID_VALUE, "Invalid depth parameter: " + depthStr, null,
 154                                 "The depth parameter must be an integer between 1 and 65535 or \"unbounded\""));
 155                         }
 156                         break;
 157                     case FieldsParam.uriName:
 158                         fields = optionalParam(FieldsParam::forUriValue, paramName, paramValues);
 159                         break;
 160                     case WithDefaultsParam.uriName:
 161                         withDefaults = optionalParam(WithDefaultsParam::forUriValue, paramName, paramValues);
 162                         break;
 163                     case PrettyPrintParam.uriName:
 164                         prettyPrint = optionalParam(PrettyPrintParam::forUriValue, paramName, paramValues);
 165                         break;
 166                     default:
 167                         throw unhandledParam("read", paramName);
 168                 }
 169             } catch (IllegalArgumentException e) {
 170                 throw new RestconfDocumentedException("Invalid " + paramName + " value: " + e.getMessage(),
 171                     ErrorType.PROTOCOL, ErrorTag.INVALID_VALUE, e);
 172             }
 173         }
 174
 175         return new ReadDataParams(content, depth, fields, withDefaults, prettyPrint);
 176     }
 177
 178     public static @NonNull WriteDataParams newWriteDataParams(final UriInfo uriInfo) {
 179         InsertParam insert = null;
 180         PointParam point = null;
 181
 182         for (final Entry<String, List<String>> entry : uriInfo.getQueryParameters().entrySet()) {
 183             final String paramName = entry.getKey();
 184             final List<String> paramValues = entry.getValue();
 185
 186             try {
 187                 switch (paramName) {
 188                     case InsertParam.uriName:
 189                         insert = optionalParam(InsertParam::forUriValue, paramName, paramValues);
 190                         break;
 191                     case PointParam.uriName:
 192                         point = optionalParam(PointParam::forUriValue, paramName, paramValues);
 193                         break;
 194                     default:
 195                         throw unhandledParam("write", paramName);
 196                 }
 197             } catch (IllegalArgumentException e) {
 198                 throw new RestconfDocumentedException("Invalid " + paramName + " value: " + e.getMessage(),
 199                     ErrorType.PROTOCOL, ErrorTag.INVALID_VALUE, e);
 200             }
 201         }
 202
 203         try {
 204             return WriteDataParams.of(insert, point);
 205         } catch (IllegalArgumentException e) {
 206             throw new RestconfDocumentedException("Invalid query parameters: " + e.getMessage(), e);
 207         }
 208     }
 209
 210     private static RestconfDocumentedException unhandledParam(final String operation, final String name) {
 211         return KNOWN_PARAMS.contains(name)
 212             ? new RestconfDocumentedException("Invalid parameter in " + operation + ": " + name,
 213                 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE)
 214             : new RestconfDocumentedException("Unknown parameter in " + operation + ": " + name,
 215                 ErrorType.PROTOCOL, ErrorTag.UNKNOWN_ATTRIBUTE);
 216     }
 217
 218     @VisibleForTesting
 219     static @Nullable String optionalParam(final String name, final List<String> values) {
 220         return switch (values.size()) {
 221             case 0 -> null;
 222             case 1 -> requireNonNull(values.get(0));
 223             default -> throw new RestconfDocumentedException(
 224                 "Parameter " + name + " can appear at most once in request URI",
 225                 ErrorType.PROTOCOL, ErrorTag.INVALID_VALUE);
 226         };
 227     }
 228
 229     private static <T> @Nullable T optionalParam(final Function<String, @NonNull T> factory, final String name,
 230             final List<String> values) {
 231         final String str = optionalParam(name, values);
 232         return str == null ? null : factory.apply(str);
 233     }
 234 }