84 lines
2.7 KiB
Java
84 lines
2.7 KiB
Java
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/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.system;
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import java.net.UnknownHostException;
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import libcore.io.Libcore;
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/**
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* An unchecked exception thrown when {@code getaddrinfo} or {@code getnameinfo} fails.
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* This exception contains the native {@link #error} value, should sophisticated
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* callers need to adjust their behavior based on the exact failure.
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*
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* @hide
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*/
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public final class GaiException extends RuntimeException {
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private final String functionName;
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/**
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* The native error value, for comparison with the {@code GAI_} constants in {@link OsConstants}.
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*/
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public final int error;
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/**
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* Constructs an instance with the given function name and error value.
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*/
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public GaiException(String functionName, int error) {
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this.functionName = functionName;
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this.error = error;
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}
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/**
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* Constructs an instance with the given function name, error value, and cause.
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*/
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public GaiException(String functionName, int error, Throwable cause) {
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super(cause);
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this.functionName = functionName;
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this.error = error;
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}
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/**
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* Converts the stashed function name and error value to a human-readable string.
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* We do this here rather than in the constructor so that callers only pay for
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* this if they need it.
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*/
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@Override public String getMessage() {
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String gaiName = OsConstants.gaiName(error);
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if (gaiName == null) {
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gaiName = "GAI_ error " + error;
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}
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String description = Libcore.os.gai_strerror(error);
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return functionName + " failed: " + gaiName + " (" + description + ")";
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}
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/**
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* @hide - internal use only.
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*/
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public UnknownHostException rethrowAsUnknownHostException(String detailMessage) throws UnknownHostException {
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UnknownHostException newException = new UnknownHostException(detailMessage);
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newException.initCause(this);
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throw newException;
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}
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/**
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* @hide - internal use only.
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*/
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public UnknownHostException rethrowAsUnknownHostException() throws UnknownHostException {
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throw rethrowAsUnknownHostException(getMessage());
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}
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}
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