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Optimization.java
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Optimization.java
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/*
* The MIT License (MIT)
*
* Copyright (c) 2016-2023 Objectionary.com
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.eolang.jeo;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collection;
import java.util.Objects;
import java.util.stream.Collectors;
import java.util.stream.Stream;
/**
* Optimization by using the EO language.
* The entrypoint class for the optimization.
*
* @since 0.1.0
* @todo #13:90min Add unit tests for Optimization class.
* The unit tests should cover the next cases:
* - The classes directory is empty.
* - The classes directory does not exist.
* - The classes directory has some clases.
* - The classes directory has some classes and some subdirectories.
* - The classes directory has some classes and some garbage.
* When the unit tests are ready, remove that puzzle.
* @todo #13:90min Implement back transformation to bytecode.
* The Optimization class should transform the IRs back to bytecode.
* When the back transformation is ready, remove that puzzle.
* Don't forget to add unit tests for the back transformation.
*/
final class Optimization {
/**
* Project compiled classes.
*/
private final Path classes;
/**
* Improvements to apply.
*/
private final Boost boosts;
/**
* Ctor.
* @param classes Project compiled classes.
* @param boost Improvements to apply.
*/
Optimization(final Path classes, final Boost boost) {
this.classes = classes;
this.boosts = boost;
}
/**
* Apply the optimization.
* @throws IOException If some I/O problem arises.
*/
void apply() throws IOException {
this.boosts.apply(
this.bytecode()
.stream()
.map(BytecodeIR::new)
.collect(Collectors.toList())
);
}
/**
* Find all bytecode files.
* @return Collection of bytecode files
* @throws IOException If some I/O problem arises
*/
private Collection<Path> bytecode() throws IOException {
if (Objects.isNull(this.classes)) {
throw new IllegalStateException(
"The classes directory is not set, jeo-maven-plugin does not know where to look for classes."
);
}
try (Stream<Path> walk = Files.walk(this.classes)) {
return walk.filter(path -> path.toString().endsWith(".class"))
.collect(Collectors.toList());
}
}
}