package io.eguan.configuration;
/*
* #%L
* Project eguan
* %%
* Copyright (C) 2012 - 2017 Oodrive
* %%
* 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.
* #L%
*/
import io.eguan.configuration.ValidationError.ErrorType;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Objects;
/**
* {@link AbstractConfigKey} implementation dedicated to handling any form of {@link InetAddress} representation.
*
* @author oodrive
* @author pwehrle
* @author llambert
*
*/
public abstract class InetAddressConfigKey extends AbstractConfigKey {
/**
* Proxy constructor for subclasses.
*
* @param name
* see {@link AbstractConfigKey#AbstractConfigKey(String)}
*/
public InetAddressConfigKey(final String name) {
super(name);
}
@Override
public final InetAddress getTypedValue(final MetaConfiguration configuration) throws IllegalStateException,
ClassCastException, NullPointerException {
Objects.requireNonNull(configuration);
checkConfigForKey(configuration);
return (InetAddress) configuration.getValue(this);
}
@Override
protected final Object parseValue(final String value) throws IllegalArgumentException, NullPointerException {
if (value.isEmpty()) {
// Returns the default value or null when there is no default value
final InetAddress defaultValue = (InetAddress) getDefaultValue();
return defaultValue;
}
try {
return InetAddress.getByName(value);
}
catch (final UnknownHostException e) {
throw new IllegalArgumentException(e);
}
}
@Override
protected final String valueToString(final Object value) throws IllegalArgumentException, NullPointerException {
if (value == null) {
return "";
}
if (value instanceof InetAddress) {
return ((InetAddress) value).getHostAddress();
}
else {
throw new IllegalArgumentException("Not an InetAddress");
}
}
@Override
protected final ValidationError checkValue(final Object value) {
final ValidationError result = checkForNullAndRequired(value);
if (result != ValidationError.NO_ERROR) {
return (result.getType() == ValidationError.ErrorType.VALUE_NULL) ? ValidationError.NO_ERROR : result;
}
try {
final InetAddress inetAddrValue = InetAddress.class.cast(value);
return performadditionalChecks(inetAddrValue);
}
catch (final ClassCastException ce) {
return new ValidationError(ErrorType.VALUE_INVALID, null, this, value, ce.getMessage());
}
}
/**
* Method to be override by subclasses for additional checks on the {@link InetAddress} value.
*
* @param value
* the value of type {@link InetAddress}
* @return possible {@link ValidationError}s
*/
protected abstract ValidationError performadditionalChecks(InetAddress value);
}