com.adobe.acs.commons.mcp.impl.processes.asset.NamesFilter Maven / Gradle / Ivy

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Main ACS AEM Commons OSGi Bundle. Includes commons utilities.

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/*
 * #%L
 * ACS AEM Commons Bundle
 * %%
 * Copyright (C) 2018 Adobe
 * %%
 * 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.
 * #L%
 */
package com.adobe.acs.commons.mcp.impl.processes.asset;

import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang3.StringUtils;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Optional;

class NamesFilter {

    private List include = new ArrayList<>();
    private List exclude = new ArrayList<>();

    NamesFilter() {
    }

    NamesFilter(String filterString) {
        List filterExpressions = Optional.ofNullable(filterString)
                                                 .filter(StringUtils::isNotEmpty)
                                                 .map(str -> str.trim().toLowerCase().split(","))
                                                 .map(Arrays::asList)
                                                 .orElse(Collections.emptyList());

        for (String filterExpression : filterExpressions) {
            if (filterExpression.startsWith("+")) {
                include.add(filterExpression.substring(1));
            } else if (filterExpression.startsWith("-")) {
                exclude.add(filterExpression.substring(1));
            } else {
                include.add(filterExpression);
            }
        }

        include.removeAll(exclude);
    }

    boolean isNotValidName(String name) {
        return !isValidName(name);
    }

    private boolean isValidName(String name) {
        if (isEmptyFilter()) {
            return true;
        }

        if (isOnlyIncludeFiler()) {
            return isIncluded(name);
        }

        if (isOnlyExcludeFilter()) {
            return isNotExcluded(name);
        }

        return isIncluded(name) && isNotExcluded(name);
    }

    private boolean isNotExcluded(final String name) {
        return !exclude.contains(name);
    }

    private boolean isIncluded(final String name) {
        return include.contains(name);
    }

    private boolean isOnlyExcludeFilter() {
        return CollectionUtils.isNotEmpty(exclude) && CollectionUtils.isEmpty(include);
    }

    private boolean isOnlyIncludeFiler() {
        return CollectionUtils.isEmpty(exclude) && CollectionUtils.isNotEmpty(include);
    }

    private boolean isEmptyFilter() {
        return CollectionUtils.isEmpty(exclude) && CollectionUtils.isEmpty(include);
    }
}