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/*
* Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.netconf.sal.rest.impl;
import com.google.common.base.Throwables;
import com.google.common.collect.Iterables;
import com.google.gson.stream.JsonReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import javax.ws.rs.Consumes;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.Provider;
import org.opendaylight.netconf.sal.rest.api.Draft02;
import org.opendaylight.netconf.sal.rest.api.RestconfService;
import org.opendaylight.netconf.sal.restconf.impl.ControllerContext;
import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
import org.opendaylight.restconf.common.util.RestUtil;
import org.opendaylight.yangtools.yang.common.ErrorTag;
import org.opendaylight.yangtools.yang.common.ErrorType;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.AugmentationNode;
import org.opendaylight.yangtools.yang.data.api.schema.ChoiceNode;
import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
import org.opendaylight.yangtools.yang.data.impl.schema.ResultAlreadySetException;
import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack.Inference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Provider
@Consumes({
Draft02.MediaTypes.DATA + RestconfService.JSON,
Draft02.MediaTypes.OPERATION + RestconfService.JSON,
MediaType.APPLICATION_JSON
})
public class JsonNormalizedNodeBodyReader
extends AbstractIdentifierAwareJaxRsProvider implements MessageBodyReader<NormalizedNodeContext> {
private static final Logger LOG = LoggerFactory.getLogger(JsonNormalizedNodeBodyReader.class);
public JsonNormalizedNodeBodyReader(final ControllerContext controllerContext) {
super(controllerContext);
}
@Override
public boolean isReadable(final Class<?> type, final Type genericType, final Annotation[] annotations,
final MediaType mediaType) {
return true;
}
@SuppressWarnings("checkstyle:IllegalCatch")
@Override
public NormalizedNodeContext readFrom(final Class<NormalizedNodeContext> type, final Type genericType,
final Annotation[] annotations, final MediaType mediaType,
final MultivaluedMap<String, String> httpHeaders, final InputStream entityStream) throws
WebApplicationException {
try {
return readFrom(getInstanceIdentifierContext(), entityStream, isPost());
} catch (final Exception e) {
propagateExceptionAs(e);
return null; // no-op
}
}
@SuppressWarnings("checkstyle:IllegalCatch")
public static NormalizedNodeContext readFrom(final String uriPath, final InputStream entityStream,
final boolean isPost, final ControllerContext controllerContext) throws RestconfDocumentedException {
try {
return readFrom(controllerContext.toInstanceIdentifier(uriPath), entityStream, isPost);
} catch (final Exception e) {
propagateExceptionAs(e);
return null; // no-op
}
}
private static NormalizedNodeContext readFrom(final InstanceIdentifierContext path,
final InputStream entityStream, final boolean isPost)
throws IOException {
final Optional<InputStream> nonEmptyInputStreamOptional = RestUtil.isInputStreamEmpty(entityStream);
if (nonEmptyInputStreamOptional.isEmpty()) {
return new NormalizedNodeContext(path, null);
}
final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
final Inference parentInference;
if (isPost && !(path.getSchemaNode() instanceof RpcDefinition)) {
parentInference = path.inference();
} else {
final var inference = path.inference();
if (!inference.statementPath().isEmpty()) {
final var stack = inference.toSchemaInferenceStack();
stack.exit();
parentInference = stack.toInference();
} else {
parentInference = inference;
}
}
final JsonParserStream jsonParser = JsonParserStream.create(writer,
JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02.getShared(path.getSchemaContext()),
parentInference);
final JsonReader reader = new JsonReader(new InputStreamReader(nonEmptyInputStreamOptional.get(),
StandardCharsets.UTF_8));
jsonParser.parse(reader);
NormalizedNode result = resultHolder.getResult();
final List<YangInstanceIdentifier.PathArgument> iiToDataList = new ArrayList<>();
InstanceIdentifierContext newIIContext;
while (result instanceof AugmentationNode || result instanceof ChoiceNode) {
final Object childNode = ((DataContainerNode) result).body().iterator().next();
if (isPost) {
iiToDataList.add(result.getIdentifier());
}
result = (NormalizedNode) childNode;
}
if (isPost) {
if (result instanceof MapEntryNode) {
iiToDataList.add(new YangInstanceIdentifier.NodeIdentifier(result.getIdentifier().getNodeType()));
iiToDataList.add(result.getIdentifier());
} else {
iiToDataList.add(result.getIdentifier());
}
} else {
if (result instanceof MapNode) {
result = Iterables.getOnlyElement(((MapNode) result).body());
}
}
return new NormalizedNodeContext(path.withConcatenatedArgs(iiToDataList), result);
}
private static void propagateExceptionAs(final Exception exception) throws RestconfDocumentedException {
Throwables.throwIfInstanceOf(exception, RestconfDocumentedException.class);
LOG.debug("Error parsing json input", exception);
if (exception instanceof ResultAlreadySetException) {
throw new RestconfDocumentedException("Error parsing json input: Failed to create new parse result data. "
+ "Are you creating multiple resources/subresources in POST request?", exception);
}
RestconfDocumentedException.throwIfYangError(exception);
throw new RestconfDocumentedException("Error parsing input: " + exception.getMessage(), ErrorType.PROTOCOL,
ErrorTag.MALFORMED_MESSAGE, exception);
}
}
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