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CollectionInstanceContext.java
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CollectionInstanceContext.java
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/**
* Copyright (C) 2017 Czech Technical University in Prague
* <p>
* 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.
* <p>
* 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.exception.JsonLdDeserializationException;
import java.util.Collection;
import java.util.Map;
import java.util.Optional;
class CollectionInstanceContext<T extends Collection> extends InstanceContext<T> {
private final Class<?> targetType;
CollectionInstanceContext(T instance, Map<String, Object> knownInstances) {
super(instance, knownInstances);
this.targetType = null;
}
CollectionInstanceContext(T instance, Class<?> targetType, Map<String, Object> knownInstances) {
super(instance, knownInstances);
this.targetType = targetType;
}
/**
* Adds the specified item into this collection.
*
* @param item The item to add
*/
@Override
void addItem(Object item) {
if (targetType == null) {
instance.add(item);
return;
}
Optional<Object> toAdd = resolveAssignableValue(targetType, item);
if (!toAdd.isPresent()) {
throw typeMismatch(targetType, item.getClass());
} else {
instance.add(toAdd.get());
}
}
private JsonLdDeserializationException typeMismatch(Class<?> expected, Class<?> actual) {
return new JsonLdDeserializationException(
"Type mismatch. Unable to transform instance of type " + actual + " to the expected type " + expected);
}
@Override
Class<?> getItemType() {
return targetType;
}
}