/*
* Copyright 2013 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.model.dsl.internal;
import com.google.common.collect.Lists;
import groovy.lang.Closure;
import net.jcip.annotations.ThreadSafe;
import org.gradle.api.Transformer;
import org.gradle.model.dsl.internal.transform.RuleMetadata;
import org.gradle.model.dsl.internal.transform.RulesBlock;
import org.gradle.model.dsl.internal.transform.SourceLocation;
import org.gradle.model.internal.core.ModelPath;
import org.gradle.model.internal.core.ModelReference;
import org.gradle.model.internal.registry.ModelRegistry;
import java.util.List;
@ThreadSafe
public class TransformedModelDslBacking {
private static final Transformer<List<ModelReference<?>>, Closure<?>> INPUT_PATHS_EXTRACTOR = new Transformer<List<ModelReference<?>>, Closure<?>>() {
public List<ModelReference<?>> transform(Closure<?> closure) {
RuleMetadata ruleMetadata = getRuleMetadata(closure);
String[] paths = ruleMetadata.inputPaths();
List<ModelReference<?>> references = Lists.newArrayListWithCapacity(paths.length);
for (int i = 0; i < paths.length; i++) {
String description = String.format("@ line %d", ruleMetadata.inputLineNumbers()[i]);
references.add(ModelReference.untyped(ModelPath.path(paths[i]), description));
}
return references;
}
};
private static final Transformer<SourceLocation, Closure<?>> RULE_LOCATION_EXTRACTOR = new Transformer<SourceLocation, Closure<?>>() {
public SourceLocation transform(Closure<?> closure) {
RuleMetadata ruleMetadata = getRuleMetadata(closure);
return new SourceLocation(ruleMetadata.scriptSourceDescription(), ruleMetadata.lineNumber(), ruleMetadata.columnNumber());
}
};
private final ModelRegistry modelRegistry;
private final Object thisObject;
private final Object owner;
private final Transformer<? extends List<ModelReference<?>>, ? super Closure<?>> inputPathsExtractor;
private final Transformer<SourceLocation, ? super Closure<?>> ruleLocationExtractor;
public TransformedModelDslBacking(ModelRegistry modelRegistry, Object thisObject, Object owner) {
this(modelRegistry, thisObject, owner, INPUT_PATHS_EXTRACTOR, RULE_LOCATION_EXTRACTOR);
}
TransformedModelDslBacking(ModelRegistry modelRegistry, Object thisObject, Object owner, Transformer<? extends List<ModelReference<?>>, ? super Closure<?>> inputPathsExtractor,
Transformer<SourceLocation, ? super Closure<?>> ruleLocationExtractor) {
this.modelRegistry = modelRegistry;
this.thisObject = thisObject;
this.owner = owner;
this.inputPathsExtractor = inputPathsExtractor;
this.ruleLocationExtractor = ruleLocationExtractor;
}
public void configure(String modelPathString, Closure<?> configuration) {
List<ModelReference<?>> references = inputPathsExtractor.transform(configuration);
SourceLocation sourceLocation = ruleLocationExtractor.transform(configuration);
ModelPath modelPath = ModelPath.path(modelPathString);
Closure<?> reownered = configuration.rehydrate(null, owner, thisObject);
modelRegistry.mutate(new ClosureBackedModelMutator(reownered, references, modelPath, sourceLocation));
}
private static RuleMetadata getRuleMetadata(Closure<?> closure) {
RuleMetadata ruleMetadata = closure.getClass().getAnnotation(RuleMetadata.class);
if (ruleMetadata == null) {
throw new IllegalStateException(String.format("Expected %s annotation to be used on the argument closure.", RuleMetadata.class.getName()));
}
return ruleMetadata;
}
public static boolean isTransformedBlock(Closure<?> closure) {
Class<? extends Closure> closureClass = closure.getClass();
RulesBlock annotation = closureClass.getAnnotation(RulesBlock.class);
return annotation != null;
}
}