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SingularObjectContext.java
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SingularObjectContext.java
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/**
* Copyright (C) 2022 Czech Technical University in Prague
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.jsonld.deserialization;
import cz.cvut.kbss.jsonld.common.BeanAnnotationProcessor;
import cz.cvut.kbss.jsonld.common.BeanClassProcessor;
import cz.cvut.kbss.jsonld.exception.JsonLdDeserializationException;
import java.lang.reflect.Field;
import java.util.Collection;
import java.util.Map;
import java.util.Optional;
class SingularObjectContext<T> extends InstanceContext<T> {
private final Map<String, Field> fieldMap;
SingularObjectContext(T instance, Map<String, Field> fieldMap, Map<String, Object> knownInstances) {
super(instance, knownInstances);
this.fieldMap = fieldMap;
}
@Override
Field getFieldForProperty(String property) {
return fieldMap.get(property);
}
@Override
void setFieldValue(Field field, Object value) {
assert !(instance instanceof Collection);
final Optional<Object> toSet = resolveAssignableValue(field.getType(), value);
if (!toSet.isPresent()) {
throw valueTypeMismatch(value, field);
}
BeanClassProcessor.setFieldValue(field, instance, toSet.get());
}
private JsonLdDeserializationException valueTypeMismatch(Object value, Field field) {
final Object attemptedValue = knownInstances.getOrDefault(value.toString(), value);
return new JsonLdDeserializationException(
"Type mismatch. Cannot set value " + attemptedValue + " of type " + attemptedValue.getClass() +
" on field " + field);
}
@Override
boolean isPropertyMapped(String property) {
return fieldMap.containsKey(property) || hasPropertiesField();
}
@Override
boolean supports(String property) {
if (!isPropertyMapped(property)) {
return false;
}
return !fieldMap.containsKey(property) || BeanAnnotationProcessor.isWriteable(fieldMap.get(property));
}
}