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/*
* Copyright (C) 2011 The Android Open Source Project
*
* 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.
*/
package android.system;
import java.net.UnknownHostException;
import libcore.io.Libcore;
/**
* An unchecked exception thrown when {@code getaddrinfo} or {@code getnameinfo} fails.
* This exception contains the native {@link #error} value, should sophisticated
* callers need to adjust their behavior based on the exact failure.
*
* @hide
*/
public final class GaiException extends RuntimeException {
private final String functionName;
/**
* The native error value, for comparison with the {@code GAI_} constants in {@link OsConstants}.
*/
public final int error;
public GaiException(String functionName, int error) {
this.functionName = functionName;
this.error = error;
}
public GaiException(String functionName, int error, Throwable cause) {
super(cause);
this.functionName = functionName;
this.error = error;
}
/**
* Converts the stashed function name and error value to a human-readable string.
* We do this here rather than in the constructor so that callers only pay for
* this if they need it.
*/
@Override public String getMessage() {
String gaiName = OsConstants.gaiName(error);
if (gaiName == null) {
gaiName = "GAI_ error " + error;
}
String description = Libcore.os.gai_strerror(error);
return functionName + " failed: " + gaiName + " (" + description + ")";
}
public UnknownHostException rethrowAsUnknownHostException(String detailMessage) throws UnknownHostException {
UnknownHostException newException = new UnknownHostException(detailMessage);
newException.initCause(this);
throw newException;
}
public UnknownHostException rethrowAsUnknownHostException() throws UnknownHostException {
throw rethrowAsUnknownHostException(getMessage());
}
}
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