/*
 * Copyright (c) 2017, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package jakarta.json;

import java.io.Serializable;
import java.util.AbstractList;
import java.util.Collections;
import java.util.List;
import java.util.RandomAccess;

Private implementation of immutable JsonArray.
Author:Lukas Jungmann
/** * Private implementation of immutable {@link JsonArray}. * * @author Lukas Jungmann */
final class EmptyArray extends AbstractList<JsonValue> implements JsonArray, Serializable, RandomAccess { private static final long serialVersionUID = 7295439472061642859L; @Override public JsonValue get(int index) { throw new IndexOutOfBoundsException("Index: " + index); } @Override public int size() { return 0; } @Override public JsonObject getJsonObject(int index) { return (JsonObject) get(index); } @Override public JsonArray getJsonArray(int index) { return (JsonArray) get(index); } @Override public JsonNumber getJsonNumber(int index) { return (JsonNumber) get(index); } @Override public JsonString getJsonString(int index) { return (JsonString) get(index); } @Override public <T extends JsonValue> List<T> getValuesAs(Class<T> clazz) { return Collections.emptyList(); } @Override public String getString(int index) { return getJsonString(index).getString(); } @Override public String getString(int index, String defaultValue) { return defaultValue; } @Override public int getInt(int index) { return getJsonNumber(index).intValue(); } @Override public int getInt(int index, int defaultValue) { return defaultValue; } @Override public boolean getBoolean(int index) { return get(index) == JsonValue.TRUE; } @Override public boolean getBoolean(int index, boolean defaultValue) { return defaultValue; } @Override public boolean isNull(int index) { return get(index) == JsonValue.NULL; } @Override public ValueType getValueType() { return ValueType.ARRAY; } // Preserves singleton property private Object readResolve() { return JsonValue.EMPTY_JSON_ARRAY; } }