com.marvinformatics.manifestvalidatorplugin.oo.PresentRule.java Source code

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Here is the source code for com.marvinformatics.manifestvalidatorplugin.oo.PresentRule.java

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/**
 * Copyright (C) 2017 Marvin Herman Froeder (velobr@gmail.com)
 *
 * 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.JarFile;

import com.google.common.base.Strings;

public class PresentRule implements ManifestRule {

    @Override
    public Optional<String> validate(String value, JarFile jar) {
        if (Strings.isNullOrEmpty(value))
            return Optional.of("Expected to be present");
        return Optional.empty();
    }

}