CompositeFilter.java

/*
CloudTrail Viewer, is a Java desktop application for reading AWS CloudTrail logs
files.

Copyright (C) 2017  Mark P. Haskins

This program is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software Foundation,
either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package io.haskins.java.cloudtrailviewer.filter;

import io.haskins.java.cloudtrailviewer.model.event.Event;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * A composite filter is a collection of Filters that either all must AND or OR pass before TRUE or FALSE is retuned.
 *
 * Created by markhaskins on 04/01/2017.
 */
public class CompositeFilter implements Serializable {

    public static final int BITWISE_AND = 0;
    public static final int BITWISE_OR = 1;

    private static final String[] BITWISE_OPERATORS = { "AND", "OR" };
    private static final long serialVersionUID = 2156770386890860914L;

    private int mode = BITWISE_AND;

    private final List<Filter> filters = new ArrayList<>();

    ////////////////////////////////////////////////////////////////////////////
    ///// public methods
    ////////////////////////////////////////////////////////////////////////////
    public String[] getOperators() {
        return Arrays.copyOf(BITWISE_OPERATORS, BITWISE_OPERATORS.length);
    }

    public void addFilter(Filter f) {
        filters.add(f);
    }

    void removeFilter(Filter f) {
        filters.remove(f);
    }

    public void clear() {
        filters.clear();
    }

    public void setMode(int mode) {
        this.mode = mode;
    }

    int getMode() {
        return this.mode;
    }

    public String getModeString() {
        return BITWISE_OPERATORS[mode];
    }

    boolean allFiltersConfigured() {

        boolean allFiltersConfigured = true;

        if (!filters.isEmpty()) {

            for (Filter filter : filters) {

                if (!filter.isNeedleSet()) {
                    allFiltersConfigured = false;
                }
            }

        } else {
            allFiltersConfigured = false;
        }

        return allFiltersConfigured;
    }

    public boolean passes(Event event) {

        boolean passed = true;

        for (Filter filter : filters) {

            if (mode == BITWISE_AND) {
                passed &= filter.passesFilter(event);
            } else {
                passed = false;
                passed |= filter.passesFilter(event);
            }
        }

        return passed;
    }

    public int size() {
        return filters.size();
    }
}