org.jooq.impl.AbstractStore Maven / Gradle / Ivy
/**
* Copyright (c) 2009-2016, Data Geekery GmbH (http://www.datageekery.com)
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Other licenses:
* -----------------------------------------------------------------------------
* Commercial licenses for this work are available. These replace the above
* ASL 2.0 and offer limited warranties, support, maintenance, and commercial
* database integrations.
*
* For more information, please visit: http://www.jooq.org/licenses
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package org.jooq.impl;
import java.util.Arrays;
import java.util.List;
// ...
import org.jooq.Attachable;
import org.jooq.AttachableInternal;
import org.jooq.Configuration;
import org.jooq.DSLContext;
import org.jooq.Record;
/**
* A common base class for {@link Record} and {@link ArrayRecord}
*
* This base class takes care of implementing similar {@link Attachable} and
* {@link Object#equals(Object)}, {@link Object#hashCode()} behaviour.
*
* @author Lukas Eder
*/
abstract class AbstractStore implements AttachableInternal {
/**
* Generated UID
*/
private static final long serialVersionUID = -2989496800221194411L;
private Configuration configuration;
AbstractStore() {
this(null);
}
AbstractStore(Configuration configuration) {
this.configuration = configuration;
}
// -------------------------------------------------------------------------
// The Attachable API
// -------------------------------------------------------------------------
abstract List getAttachables();
@Override
public final void attach(Configuration c) {
configuration = c;
final List attachables = getAttachables();
final int size = attachables.size();
for (int i = 0; i < size; i++) {
Attachable attachable = attachables.get(i);
if (attachable != null)
attachable.attach(c);
}
}
@Override
public final void detach() {
attach(null);
}
@Override
public final Configuration configuration() {
return configuration;
}
/**
* This method is used in generated code!
*/
protected final DSLContext create() {
return DSL.using(configuration());
}
// -------------------------------------------------------------------------
// equals and hashCode
// -------------------------------------------------------------------------
/**
* This method coincides with {@link Record#size()} and
* {@link ArrayRecord#size()}
*/
abstract int size();
/**
* This method coincides with {@link Record#get(int)} and
* ArrayRecordImpl.getValue(int)
*/
abstract Object get(int index);
@Override
public int hashCode() {
int hashCode = 1;
for (int i = 0; i < size(); i++) {
final Object obj = get(i);
if (obj == null) {
hashCode = 31 * hashCode;
}
// [#985] [#2045] Don't use obj.hashCode() on arrays, but avoid
// calculating it as byte[] (BLOBs) can be quite large
else if (obj.getClass().isArray()) {
hashCode = 31 * hashCode;
}
else {
hashCode = 31 * hashCode + obj.hashCode();
}
}
return hashCode;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
// Note: keep this implementation in-sync with AbstractRecord.compareTo()!
if (obj instanceof AbstractStore) {
final AbstractStore that = (AbstractStore) obj;
if (size() == that.size()) {
for (int i = 0; i < size(); i++) {
final Object thisValue = get(i);
final Object thatValue = that.get(i);
// [#1850] Only return false early. In all other cases,
// continue checking the remaining fields
if (thisValue == null && thatValue == null) {
continue;
}
else if (thisValue == null || thatValue == null) {
return false;
}
// [#985] Compare arrays too.
else if (thisValue.getClass().isArray() && thatValue.getClass().isArray()) {
// Might be byte[]
if (thisValue.getClass() == byte[].class && thatValue.getClass() == byte[].class) {
if (!Arrays.equals((byte[]) thisValue, (byte[]) thatValue)) {
return false;
}
}
// Other primitive types are not expected
else if (!thisValue.getClass().getComponentType().isPrimitive() &&
!thatValue.getClass().getComponentType().isPrimitive()) {
if (!Arrays.equals((Object[]) thisValue, (Object[]) thatValue)) {
return false;
}
}
else {
return false;
}
}
else if (!thisValue.equals(thatValue)) {
return false;
}
}
// If we got through the above loop, the two records are equal
return true;
}
}
return false;
}
}