/*
* 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.api.internal.tasks.compile.incremental;
import com.google.common.io.Files;
import org.gradle.api.internal.tasks.compile.incremental.asm.ClassDependenciesVisitor;
import org.gradle.api.internal.tasks.compile.incremental.deps.DependentsSet;
import org.gradle.api.internal.tasks.compile.incremental.jar.PreviousCompilation;
import org.gradle.api.internal.tasks.compile.incremental.recomp.RecompilationSpec;
import org.gradle.api.tasks.incremental.InputFileDetails;
import org.gradle.util.internal.Java9ClassReader;
import org.objectweb.asm.ClassReader;
import java.io.IOException;
import java.util.Collections;
import java.util.Set;
public class ClassChangeProcessor {
private final PreviousCompilation previousCompilation;
public ClassChangeProcessor(PreviousCompilation previousCompilation) {
this.previousCompilation = previousCompilation;
}
public void processChange(final InputFileDetails input, final RecompilationSpec spec) {
if (input.isRemoved()) {
// this is a really heavyweight way of getting the dependencies of a file which was removed
// hopefully this is not going to happen too often
String className = previousCompilation.getClassName(input.getFile().getAbsolutePath());
update(input, spec, className, Collections.<Integer>emptySet());
return;
}
final ClassReader classReader;
try {
classReader = new Java9ClassReader(Files.toByteArray(input.getFile()));
String className = classReader.getClassName().replaceAll("/", ".");
Set<Integer> constants = ClassDependenciesVisitor.retrieveConstants(classReader);
update(input, spec, className, constants);
} catch (IOException e) {
throw new IllegalArgumentException(String.format("Unable to read class file: '%s'", input.getFile()));
}
}
protected void update(InputFileDetails input, RecompilationSpec spec, String className, Set<Integer> newConstants) {
DependentsSet actualDependents = previousCompilation.getDependents(className, newConstants);
if (actualDependents.isDependencyToAll()) {
spec.setFullRebuildCause(actualDependents.getDescription(), input.getFile());
} else {
spec.getClassNames().addAll(actualDependents.getDependentClasses());
}
}
}