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/*
* Copyright (c) 2010-2015 Pivotal Software, Inc. 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. See accompanying
* LICENSE file.
*/
package com.gemstone.gemfire.admin.internal;
import com.gemstone.gemfire.admin.ConfigurationParameter;
import com.gemstone.gemfire.admin.UnmodifiableConfigurationException;
import com.gemstone.gemfire.internal.i18n.LocalizedStrings;
import java.io.File;
//import java.net.InetAddress;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* A single configuration parameter of a system member.
*
* @author Kirk Lund
* @since 3.5
*
*/
public class ConfigurationParameterImpl
implements com.gemstone.gemfire.admin.ConfigurationParameter {
/** Identifying name of this configuration parameter */
protected String name;
/** Full description of this configuration parameter */
protected String description;
/** The current value */
protected Object value;
/** Class type of the value */
protected Class type;
/** True if this is modifiable; false if read-only */
protected boolean userModifiable;
/** List of listeners to notify when value changes */
private final List listeners = new ArrayList();
// -------------------------------------------------------------------------
// Constructor(s)
// -------------------------------------------------------------------------
/**
* Constructs new ConfigurationParameterImpl.
*
* @param name the name of this parameter which cannot change
* @param description full description to use
* @param value the value of this parameter
* @param type the class type of the value
* @param userModifiable true if this is modifiable; false if read-only
*/
protected ConfigurationParameterImpl(String name,
String description,
Object value,
Class type,
boolean userModifiable) {
if (name == null || name.length() == 0) {
throw new IllegalArgumentException(LocalizedStrings.ConfigurationParameterImpl_CONFIGURATIONPARAMETER_NAME_MUST_BE_SPECIFIED.toLocalizedString());
}
this.name = name;
setInternalState(description, value, type, userModifiable);
}
/**
* Constructs new ConfigurationParameterImpl.
*
* @param name the name of this parameter which cannot change
* @param value the value of this parameter
*/
protected ConfigurationParameterImpl(String name,
Object value) {
if (name == null || name.length() == 0) {
throw new IllegalArgumentException(LocalizedStrings.ConfigurationParameterImpl_CONFIGURATIONPARAMETER_NAME_MUST_BE_SPECIFIED.toLocalizedString());
}
this.name = name;
setInternalState(name, value, value.getClass(), true);
}
/** Constructor to allow serialization by subclass */
protected ConfigurationParameterImpl() {}
// -------------------------------------------------------------------------
// Attribute accessors and mutators
// -------------------------------------------------------------------------
public String getName() {
return this.name;
}
public String getDescription() {
return this.description;
}
public Object getValue() {
return this.value;
}
public String getValueAsString() {
if (isString()) {
return (String) this.value;
}
else if (isInetAddress()) {
return InetAddressUtil.toString(this.value);
}
else if (isFile()) {
return this.value.toString();
}
else if (isOctal()) {
String strVal = Integer.toOctalString(((Integer) this.value).intValue());
if (!strVal.startsWith("0")) {
strVal = "0" + strVal;
}
return strVal;
}
else if (isArray()) {
List list = Arrays.asList((Object[]) this.value);
return list.toString();
}
else {
return this.value.toString();
}
}
public Class getValueType() {
return this.type;
}
public boolean isModifiable() {
return this.userModifiable;
}
public boolean isArray() {
return "manager-parameters".equals(this.name) ||
"manager-classpaths".equals(this.name);
}
public boolean isInetAddress() {
return java.net.InetAddress.class.isAssignableFrom(this.type);
}
public boolean isFile() {
return java.io.File.class.equals(this.type);
}
public boolean isOctal() {
return "shared-memory-permissions".equals(this.name);
}
public boolean isString() {
return java.lang.String.class.equals(this.type);
}
public void setValue(Object value) throws UnmodifiableConfigurationException {
if (!isModifiable()) {
throw new UnmodifiableConfigurationException(LocalizedStrings.ConfigurationParameterImpl_0_IS_NOT_A_MODIFIABLE_CONFIGURATION_PARAMETER.toLocalizedString(getName()));
}
if (value == null) {
throw new IllegalArgumentException(LocalizedStrings.ConfigurationParameterImpl_UNABLE_TO_SET_0_TO_NULL_VALUE.toLocalizedString(getName()));
}
if (!getValueType().equals(value.getClass())) {
throw new IllegalArgumentException(LocalizedStrings.ConfigurationParameterImpl_UNABLE_TO_SET_TYPE_0_WITH_TYPE_1.toLocalizedString(new Object[] {getValueType().getName(), value.getClass().getName()}));
}
if (value instanceof String && !isString()) {
// we need to check what the type should be and convert to it...
setValueFromString((String) value);
}
else {
this.value = value;
}
fireConfigurationParameterValueChanged(this);
}
// -------------------------------------------------------------------------
// Operations for handling the registration of listeners
// Note: this is only for use within impl pkg and subclass pkgs
// -------------------------------------------------------------------------
/** Adds the listener for any changes to this configuration parameter. */
public void addConfigurationParameterListener(ConfigurationParameterListener listener) {
if (!this.listeners.contains(listener)) {
this.listeners.add(listener);
}
}
/** Removes the listener if it's currently registered. */
public void removeConfigurationParameterListener(ConfigurationParameterListener listener) {
if (this.listeners.contains(listener)) {
this.listeners.remove(listener);
}
}
// -------------------------------------------------------------------------
// Implementation methods
// -------------------------------------------------------------------------
protected void setValueFromString(String newValue) {
if (newValue == null) {
throw new IllegalArgumentException(LocalizedStrings.ConfigurationParameterImpl_UNABLE_TO_SET_0_TO_NULL_VALUE.toLocalizedString(getName()));
}
if (isInetAddress()) {
this.value = InetAddressUtil.toInetAddress(newValue);
}
else if (isFile()) {
this.value = new File(newValue);
}
else if (isOctal()) {
if (!newValue.startsWith("0")) {
newValue = "0" + newValue;
}
this.value = Integer.valueOf(Integer.parseInt(newValue, 8));
}
else if (isArray()) {
// parse it TODO
throw new IllegalArgumentException(LocalizedStrings.ConfigurationParameterImpl_SETTING_ARRAY_VALUE_FROM_DELIMITED_STRING_IS_NOT_SUPPORTED.toLocalizedString());
}
else {
this.value = newValue;
}
}
/**
* Fires changed configuration parameter to registered listeners.
*
* @param parm the configuration parameter the changed
*/
protected void fireConfigurationParameterValueChanged(ConfigurationParameter parm) {
ConfigurationParameterListener[] listeners =
(ConfigurationParameterListener[]) this.listeners.toArray(
new ConfigurationParameterListener[0]);
for (int i = 0; i < listeners.length; i++) {
listeners[i].configurationParameterValueChanged(parm);
}
}
/**
* Sets the internal state of this configuration parameter.
*
* @param description full description to use
* @param value the value of this parameter
* @param type the class type of the value
* @param userModifiable true if this is modifiable; false if read-only
*/
protected void setInternalState(String description,
Object value,
Class type,
boolean userModifiable) {
if (description == null || description.length() == 0) {
throw new IllegalArgumentException(LocalizedStrings.ConfigurationParameterImpl_CONFIGURATIONPARAMETER_DESCRIPTION_MUST_BE_SPECIFIED.toLocalizedString());
}
this.description = description;
this.type = type;
this.userModifiable = userModifiable;
if (value == null) {
throw new IllegalArgumentException(LocalizedStrings.ConfigurationParameterImpl_UNABLE_TO_SET_0_TO_NULL_VALUE.toLocalizedString(getName()));
}
this.value = value;
}
@Override
public String toString() {
return this.name;
}
}