io.vertx.sqlclient.impl.PropertyKindMap Maven / Gradle / Ivy
/*
* Copyright (c) 2011-2022 Contributors to the Eclipse Foundation
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
* which is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
*/
package io.vertx.sqlclient.impl;
import io.vertx.sqlclient.PropertyKind;
import java.util.Arrays;
import java.util.Objects;
/**
* A map-like storage for {@link PropertyKind} instances.
* It is suitable for our clients which store very few instances (usually just one).
*/
public final class PropertyKindMap {
private static final Object[] EMPTY_ELEMENTS = {};
private Object[] elements;
public PropertyKindMap() {
elements = EMPTY_ELEMENTS;
}
public Object get(PropertyKind property) {
for (int i = 0; i < elements.length; i += 2) {
Object key = elements[i];
if (key == property || key.equals(property)) {
return elements[i + 1];
}
}
return null;
}
public void put(PropertyKind property, Object value) {
Objects.requireNonNull(property, "property is null");
Objects.requireNonNull(value, "value is null");
for (int i = 0; i < elements.length; i += 2) {
Object key = elements[i];
if (key == property || key.equals(property)) {
elements[i + 1] = value;
return;
}
}
if (elements == EMPTY_ELEMENTS) {
elements = new Object[2];
} else {
elements = Arrays.copyOf(elements, elements.length + 2);
}
elements[elements.length - 2] = property;
elements[elements.length - 1] = value;
}
// visible for testing
int count() {
return elements.length >> 1;
}
}