/*
* Copyright 2016 the original author or authors.
*
* 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 org.gradle.internal.component;
import com.google.common.base.Function;
import com.google.common.base.Optional;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.Ordering;
import com.google.common.collect.Sets;
import org.gradle.api.attributes.Attribute;
import org.gradle.api.attributes.AttributeContainer;
import org.gradle.internal.Cast;
import org.gradle.internal.component.model.AttributeMatcher;
import org.gradle.internal.component.model.ComponentResolveMetadata;
import org.gradle.internal.component.model.ConfigurationMetadata;
import org.gradle.internal.text.TreeFormatter;
import java.util.List;
import java.util.Set;
public class AmbiguousConfigurationSelectionException extends RuntimeException {
private static final Function<ConfigurationMetadata, String> CONFIG_NAME = new Function<ConfigurationMetadata, String>() {
@Override
public String apply(ConfigurationMetadata input) {
return input.getName();
}
};
public AmbiguousConfigurationSelectionException(AttributeContainer fromConfigurationAttributes,
AttributeMatcher attributeMatcher,
List<? extends ConfigurationMetadata> matches,
ComponentResolveMetadata targetComponent) {
super(generateMessage(fromConfigurationAttributes, attributeMatcher, matches, targetComponent));
}
private static String generateMessage(AttributeContainer fromConfigurationAttributes, AttributeMatcher attributeMatcher, List<? extends ConfigurationMetadata> matches, ComponentResolveMetadata targetComponent) {
Set<String> ambiguousConfigurations = Sets.newTreeSet(Lists.transform(matches, CONFIG_NAME));
TreeFormatter formatter = new TreeFormatter();
formatter.node("Cannot choose between the following configurations of ");
formatter.append(targetComponent.getComponentId().getDisplayName());
formatter.startChildren();
for (String configuration : ambiguousConfigurations) {
formatter.node(configuration);
}
formatter.endChildren();
formatter.node("All of them match the consumer attributes");
// We're sorting the names of the configurations and later attributes
// to make sure the output is consistently the same between invocations
formatter.startChildren();
for (String ambiguousConf : ambiguousConfigurations) {
formatConfiguration(formatter, fromConfigurationAttributes, attributeMatcher, matches, ambiguousConf);
}
formatter.endChildren();
return formatter.toString();
}
static void formatConfiguration(TreeFormatter formatter, AttributeContainer consumerAttributes, AttributeMatcher attributeMatcher, List<? extends ConfigurationMetadata> matches, final String conf) {
Optional<? extends ConfigurationMetadata> match = Iterables.tryFind(matches, new Predicate<ConfigurationMetadata>() {
@Override
public boolean apply(ConfigurationMetadata input) {
return conf.equals(input.getName());
}
});
if (match.isPresent()) {
AttributeContainer producerAttributes = match.get().getAttributes();
formatter.node("Configuration '");
formatter.append(conf);
formatter.append("'");
formatAttributeMatches(formatter, consumerAttributes, attributeMatcher, producerAttributes);
}
}
public static void formatAttributeMatches(TreeFormatter formatter, AttributeContainer consumerAttributes, AttributeMatcher attributeMatcher, AttributeContainer producerAttributes) {
Set<Attribute<?>> allAttributes = Sets.union(consumerAttributes.keySet(), producerAttributes.keySet());
List<Attribute<?>> sortedAttributes = Ordering.usingToString().sortedCopy(allAttributes);
formatter.startChildren();
for (Attribute<?> attribute : sortedAttributes) {
String attributeName = attribute.getName();
if (consumerAttributes.contains(attribute) && producerAttributes.contains(attribute)) {
Object consumerValue = consumerAttributes.getAttribute(attribute);
Object producerValue = producerAttributes.getAttribute(attribute);
Attribute<Object> untyped = Cast.uncheckedCast(attribute);
if (attributeMatcher.isMatching(untyped, producerValue, consumerValue)) {
formatter.node("Required " + attributeName + " '" + consumerValue + "' and found compatible value '" + producerValue + "'.");
} else {
formatter.node("Required " + attributeName + " '" + consumerValue + "' and found incompatible value '" + producerValue + "'.");
}
} else if (consumerAttributes.contains(attribute)) {
formatter.node("Required " + attributeName + " '" + consumerAttributes.getAttribute(attribute) + "' but no value provided.");
} else {
formatter.node("Found " + attributeName + " '" + producerAttributes.getAttribute(attribute) + "' but wasn't required.");
}
}
formatter.endChildren();
}
}