DefaultJsonDeserializer.java
/*
* Portions of this software was developed by employees of the National Institute
* of Standards and Technology (NIST), an agency of the Federal Government and is
* being made available as a public service. Pursuant to title 17 United States
* Code Section 105, works of NIST employees are not subject to copyright
* protection in the United States. This software may be subject to foreign
* copyright. Permission in the United States and in foreign countries, to the
* extent that NIST may hold copyright, to use, copy, modify, create derivative
* works, and distribute this software and its documentation without fee is hereby
* granted on a non-exclusive basis, provided that this notice and disclaimer
* of warranty appears in all copies.
*
* THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
* EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
* THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
* INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
* SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE. IN NO EVENT
* SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
* INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
* OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
* CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
* PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
* OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
*/
package gov.nist.secauto.metaschema.databind.io.json;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonParser;
import gov.nist.secauto.metaschema.core.configuration.IConfiguration;
import gov.nist.secauto.metaschema.core.metapath.item.node.INodeItem;
import gov.nist.secauto.metaschema.core.metapath.item.node.INodeItemFactory;
import gov.nist.secauto.metaschema.core.util.ObjectUtils;
import gov.nist.secauto.metaschema.databind.io.AbstractDeserializer;
import gov.nist.secauto.metaschema.databind.io.DeserializationFeature;
import gov.nist.secauto.metaschema.databind.model.IAssemblyClassBinding;
import gov.nist.secauto.metaschema.databind.model.info.IDataTypeHandler;
import java.io.IOException;
import java.io.Reader;
import java.net.URI;
import edu.umd.cs.findbugs.annotations.NonNull;
public class DefaultJsonDeserializer<CLASS>
extends AbstractDeserializer<CLASS> {
private JsonFactory jsonFactory;
/**
* Construct a new JSON deserializer that will parse the bound class identified
* by the {@code classBinding}.
*
* @param classBinding
* the bound class information for the Java type this deserializer is
* operating on
*/
public DefaultJsonDeserializer(@NonNull IAssemblyClassBinding classBinding) {
super(classBinding);
}
/**
* Get a JSON factory instance.
* <p>
* This method can be used by sub-classes to create a customized factory
* instance.
*
* @return the factory
*/
@NonNull
protected JsonFactory newJsonFactoryInstance() {
return JsonFactoryFactory.instance();
}
/**
* Get the parser factory associated with this deserializer.
*
* @return the factory instance
*/
@NonNull
protected JsonFactory getJsonFactory() {
synchronized (this) {
if (jsonFactory == null) {
jsonFactory = newJsonFactoryInstance();
}
assert jsonFactory != null;
return jsonFactory;
}
}
/**
* Using the managed JSON factory, create a new JSON parser instance using the
* provided reader.
*
* @param reader
* the reader for the parser to read data from
* @return the new parser
* @throws IOException
* if an error occurred while creating the parser
*/
@SuppressWarnings("resource") // reader resource not owned
@NonNull
protected final JsonParser newJsonParser(@NonNull Reader reader) throws IOException {
return ObjectUtils.notNull(getJsonFactory().createParser(reader));
}
@SuppressWarnings("null")
@Override
protected INodeItem deserializeToNodeItemInternal(@NonNull Reader reader, @NonNull URI documentUri)
throws IOException {
INodeItem retval;
try (JsonParser jsonParser = newJsonParser(reader)) {
MetaschemaJsonReader parser = new MetaschemaJsonReader(jsonParser);
IAssemblyClassBinding classBinding = getClassBinding();
IConfiguration<DeserializationFeature<?>> configuration = getConfiguration();
if (classBinding.isRoot()
&& configuration.isFeatureEnabled(DeserializationFeature.DESERIALIZE_JSON_ROOT_PROPERTY)) {
// now parse the root property
CLASS value = ObjectUtils.requireNonNull(parser.read(classBinding));
// // we should be at the end object
// JsonUtil.assertCurrent(parser, JsonToken.END_OBJECT);
//
// // advance past the end object
// JsonToken end = parser.nextToken();
retval = INodeItemFactory.instance().newDocumentNodeItem(classBinding, documentUri, value);
} else {
// Make a temporary data type handler for the top-level definition
IDataTypeHandler dataTypeHandler = IDataTypeHandler.newDataTypeHandler(classBinding);
// read the top-level definition
CLASS value = dataTypeHandler.readItem(null, parser);
retval = INodeItemFactory.instance().newAssemblyNodeItem(classBinding, documentUri, value);
}
return retval;
}
}
@Override
public CLASS deserializeToValue(@NonNull Reader reader, @NonNull URI documentUri) throws IOException {
return INodeItem.toValue(deserializeToNodeItemInternal(reader, documentUri));
}
}