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CompositeNode.java
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CompositeNode.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.serialization.model;
import java.util.Collection;
import java.util.Collections;
import java.util.Objects;
public abstract class CompositeNode<T extends Collection<JsonNode>> extends JsonNode {
final T items;
private boolean open;
public CompositeNode() {
this.items = initItems();
this.open = true;
}
public CompositeNode(String name) {
super(name);
this.items = initItems();
this.open = true;
}
abstract T initItems();
public void addItem(JsonNode item) {
Objects.requireNonNull(item);
items.add(item);
}
public void prependItem(JsonNode item) {
throw new UnsupportedOperationException("Prepending items is not supported by this composite node.");
}
public Collection<JsonNode> getItems() {
return Collections.unmodifiableCollection(items);
}
public void close() {
this.open = false;
}
public boolean isOpen() {
return open;
}
}