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/*
* Copyright (c) 2015, 2020, Oracle and/or its affiliates.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* 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, version 2.0,
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.cj.conf;
import java.io.Serializable;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import javax.naming.RefAddr;
import javax.naming.Reference;
import com.mysql.cj.Messages;
import com.mysql.cj.exceptions.ExceptionFactory;
import com.mysql.cj.exceptions.ExceptionInterceptor;
import com.mysql.cj.exceptions.PropertyNotModifiableException;
public abstract class AbstractRuntimeProperty implements RuntimeProperty, Serializable {
private static final long serialVersionUID = -3424722534876438236L;
private PropertyDefinition propertyDefinition;
protected T value;
protected T initialValue;
protected boolean wasExplicitlySet = false;
private List> listeners;
public AbstractRuntimeProperty() {
}
protected AbstractRuntimeProperty(PropertyDefinition propertyDefinition) {
this.propertyDefinition = propertyDefinition;
this.value = propertyDefinition.getDefaultValue();
this.initialValue = propertyDefinition.getDefaultValue();
}
@Override
public PropertyDefinition getPropertyDefinition() {
return this.propertyDefinition;
}
@Override
public void initializeFrom(Properties extractFrom, ExceptionInterceptor exceptionInterceptor) {
String name = getPropertyDefinition().getName();
String alias = getPropertyDefinition().getCcAlias();
if (extractFrom.containsKey(name)) {
String extractedValue = (String) extractFrom.remove(name);
if (extractedValue != null) {
setValueInternal(extractedValue, exceptionInterceptor);
this.initialValue = this.value;
}
} else if (alias != null && extractFrom.containsKey(alias)) {
String extractedValue = (String) extractFrom.remove(alias);
if (extractedValue != null) {
setValueInternal(extractedValue, exceptionInterceptor);
this.initialValue = this.value;
}
}
}
@Override
public void initializeFrom(Reference ref, ExceptionInterceptor exceptionInterceptor) {
RefAddr refAddr = ref.get(getPropertyDefinition().getName());
if (refAddr != null) {
String refContentAsString = (String) refAddr.getContent();
if (refContentAsString != null) {
setValueInternal(refContentAsString, exceptionInterceptor);
this.initialValue = this.value;
}
}
}
@Override
public void resetValue() {
this.value = this.initialValue;
invokeListeners();
}
public boolean isExplicitlySet() {
return this.wasExplicitlySet;
}
@Override
public void addListener(RuntimePropertyListener l) {
if (this.listeners == null) {
this.listeners = new ArrayList<>();
}
boolean found = false;
for (WeakReference weakReference : this.listeners) {
if (l.equals(weakReference.get())) {
found = true;
break;
}
}
if (!found) {
this.listeners.add(new WeakReference<>(l));
}
}
@Override
public void removeListener(RuntimePropertyListener listener) {
if (this.listeners != null) {
for (WeakReference wr : this.listeners) {
RuntimePropertyListener l = wr.get();
if (l.equals(listener)) {
this.listeners.remove(wr);
break;
}
}
}
}
protected void invokeListeners() {
if (this.listeners != null) {
for (WeakReference wr : this.listeners) {
RuntimePropertyListener l = wr.get();
if (l != null) {
l.handlePropertyChange(this);
} else {
this.listeners.remove(wr);
}
}
}
}
@Override
public T getValue() {
return this.value;
}
@Override
public T getInitialValue() {
return this.initialValue;
}
@Override
public String getStringValue() {
return this.value == null ? null : this.value.toString();
}
/**
* Set the value of a property from a string value.
* It involves the {@link PropertyDefinition#parseObject(String, ExceptionInterceptor)} to validate and parse the string.
*
* @param value
* value
* @param exceptionInterceptor
* exception interceptor
*/
public void setValueInternal(String value, ExceptionInterceptor exceptionInterceptor) {
setValueInternal(getPropertyDefinition().parseObject(value, exceptionInterceptor), value, exceptionInterceptor);
}
/**
* Internal method for setting property value; ignoring the RUNTIME_NOT_MODIFIABLE flag.
*
* @param value
* value
* @param valueAsString
* value represented by String
* @param exceptionInterceptor
* exception interceptor
*/
public void setValueInternal(T value, String valueAsString, ExceptionInterceptor exceptionInterceptor) {
if (getPropertyDefinition().isRangeBased()) {
checkRange(value, valueAsString, exceptionInterceptor);
}
this.value = value;
this.wasExplicitlySet = true;
}
/**
* For range-based property, checks that value fit into range given by PropertyDefinition.
*
* @param val
* value
* @param valueAsString
* value represented by String
* @param exceptionInterceptor
* exception interceptor
*/
protected void checkRange(T val, String valueAsString, ExceptionInterceptor exceptionInterceptor) {
// no-op for not range-based properties
}
@Override
public void setValue(T value) {
setValue(value, null);
}
@Override
public void setValue(T value, ExceptionInterceptor exceptionInterceptor) {
if (getPropertyDefinition().isRuntimeModifiable()) {
setValueInternal(value, null, exceptionInterceptor);
invokeListeners();
} else {
throw ExceptionFactory.createException(PropertyNotModifiableException.class,
Messages.getString("ConnectionProperties.dynamicChangeIsNotAllowed", new Object[] { "'" + getPropertyDefinition().getName() + "'" }));
}
}
}
