com.github.rvesse.airline.utils.predicates.restrictions.RequiredFromFinder.java Source code

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Here is the source code for com.github.rvesse.airline.utils.predicates.restrictions.RequiredFromFinder.java

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/**
 * Copyright (C) 2010-16 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 com.github.rvesse.airline.utils.predicates.restrictions;

import org.apache.commons.collections4.Predicate;
import org.apache.commons.lang3.StringUtils;

import com.github.rvesse.airline.restrictions.OptionRestriction;
import com.github.rvesse.airline.restrictions.options.RequireFromRestriction;

public class RequiredFromFinder implements Predicate<OptionRestriction> {

    private final String tag;

    public RequiredFromFinder() {
        this(null);
    }

    public RequiredFromFinder(String tag) {
        this.tag = tag;
    }

    @Override
    public boolean evaluate(OptionRestriction restriction) {
        if (restriction instanceof RequireFromRestriction) {
            if (tag == null)
                return true;
            RequireFromRestriction requirement = (RequireFromRestriction) restriction;
            return StringUtils.equals(tag, requirement.getTag());
        }
        return false;
    }

}