com.marvinformatics.manifestvalidatorplugin.oo.ValidClassRule Maven / Gradle / Ivy

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Checks MANIFEST.MF of a given jar

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/**
 * Copyright (C) 2017 Marvin Herman Froeder ([email protected])
 *
 * 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 com.marvinformatics.manifestvalidatorplugin.oo;

import java.util.Optional;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

public class ValidClassRule implements ManifestRule {

    @Override
    public Optional validate(String value, JarFile jar) {
        final JarEntry classEntry = jar.getJarEntry(value.replace(".", "/") + ".class");
        if (classEntry != null)
            return Optional.empty();
        return Optional.of("Java class '" + value + "' not found");
    }

}