ModuleFinder.java
/*
* Janino - An embedded Java[TM] compiler
*
* Copyright (c) 2018 Arno Unkrig. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the
* following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.codehaus.commons.compiler.java9.java.lang.module;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
import org.codehaus.commons.compiler.util.reflect.Classes;
import org.codehaus.commons.compiler.util.reflect.Methods;
import org.codehaus.commons.compiler.util.reflect.NoException;
/**
* Pre-Java-9-compatible facade for Java 9's {@code java.lang.module.ModuleFinder} class.
*/
public final
class ModuleFinder {
private static final Class<?> CLASS = Classes.load("java.lang.module.ModuleFinder");
// SUPPRESS CHECKSTYLE ConstantName:2
private static final Method METHOD_ofSystem = Classes.getDeclaredMethod(ModuleFinder.CLASS, "ofSystem");
private static final Method METHOD_findAll = Classes.getDeclaredMethod(ModuleFinder.CLASS, "findAll");
private final /*java.lang.module.ModuleFinder*/ Object delegate;
private
ModuleFinder(/*java.lang.module.ModuleFinder*/ Object delegate) { this.delegate = delegate; }
public static ModuleFinder
ofSystem() { return new ModuleFinder(Methods.<Object, NoException>invoke(ModuleFinder.METHOD_ofSystem, null)); }
public Set<ModuleReference> // SUPPRESS CHECKSTYLE Javadoc
findAll() {
return (Set<ModuleReference>) ModuleFinder.wrapModuleReferences(
(Set<?>) Methods.<Set<?>, NoException>invoke(ModuleFinder.METHOD_findAll, this.delegate),
new HashSet<ModuleReference>()
);
}
/**
* Wraps each {@code java.lang.module.ModuleReference} in a {@link ModuleReference} and adds these to the
* <var>result</var>.
*
* @return The <var>result</var>
*/
private static <C extends Collection<ModuleReference>> C
wrapModuleReferences(Collection</*java.lang.module.ModuleReference*/ ?> moduleReferences, C result) {
for (/*java.lang.module.ModuleReference*/ Object mref : moduleReferences) {
result.add(new ModuleReference(mref));
}
return result;
}
}