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/*
* Copyright (C) 2008 Google Inc.
*
* 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 com.google.inject;
import static com.google.common.base.Preconditions.checkState;
import com.google.inject.internal.Messages;
import com.google.inject.spi.Message;
import java.util.Collection;
/**
* Thrown when a programming error such as a misplaced annotation, illegal binding, or unsupported
* scope is found. Clients should catch this exception, log it, and stop execution.
*
* @author jessewilson@google.com (Jesse Wilson)
* @since 2.0
*/
public final class ConfigurationException extends RuntimeException {
private final com.google.common.collect.ImmutableSet<Message> messages;
private Object partialValue = null;
/** Creates a ConfigurationException containing {@code messages}. */
public ConfigurationException(Iterable<Message> messages) {
this.messages = com.google.common.collect.ImmutableSet.copyOf(messages);
initCause(Messages.getOnlyCause(this.messages));
}
/** Returns a copy of this configuration exception with the specified partial value. */
public ConfigurationException withPartialValue(Object partialValue) {
checkState(this.partialValue == null,
"Can't clobber existing partial value %s with %s", this.partialValue, partialValue);
ConfigurationException result = new ConfigurationException(messages);
result.partialValue = partialValue;
return result;
}
/** Returns messages for the errors that caused this exception. */
public Collection<Message> getErrorMessages() {
return messages;
}
/**
* Returns a value that was only partially computed due to this exception. The caller can use this
* while collecting additional configuration problems.
*
* @return the partial value, or {@code null} if none was set. The type of the partial value is
* specified by the throwing method.
*/
@SuppressWarnings({
"unchecked",
"TypeParameterUnusedInFormals"
}) // this is *extremely* unsafe. We trust the caller here.
public <E> E getPartialValue() {
return (E) partialValue;
}
@Override public String getMessage() {
return Messages.formatMessages("Guice configuration errors", messages);
}
private static final long serialVersionUID = 0;
}
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