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JSpringBot CSV Library
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/*
 * Copyright (c) 2012. JSpringBot. All Rights Reserved.
 *
 * See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The JSpringBot licenses this file to You 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 org.jspringbot.keyword.csv.criteria;

import org.apache.commons.collections.CollectionUtils;

import java.util.LinkedList;
import java.util.List;
import java.util.Map;

/**
 * Creates a CSV line criteria
 */
public class CSVLineCriteria implements RestrictionAppender {

    private List restrictions;

    private List lines;

    private Map headers;

    public CSVLineCriteria(List lines, Map headers) {
        this.lines = lines;
        this.headers = headers;
        restrictions = new LinkedList();
    }

    public CSVLineCriteria add(Restriction restriction) {
        restrictions.add(restriction);

        return this;
    }

    @Override
    public void append(Restriction r) {
        add(r);
    }

    private boolean matches(String[] line) {
        for(Restriction r : restrictions) {
            if(!r.matches(line, headers)) {
                return false;
            }
        }

        return true;
    }

    public String[] uniqueResult() {
        List items = list();

        if(CollectionUtils.isEmpty(items)) {
            return null;
        }

        if(CollectionUtils.size(items) > 1) {
            throw new IllegalStateException("Has more than one entries found.");
        }

        return items.iterator().next();
    }

    public String[] firstResult() {
        LinkedList items = list();

        if(CollectionUtils.isEmpty(items)) {
            throw new IllegalStateException("No items found.");
        }

        return items.getFirst();
    }


    public String[] lastResult() {
        LinkedList items = list();

        if(CollectionUtils.isEmpty(items)) {
            throw new IllegalStateException("No items found.");
        }

        return items.getLast();
    }

    public LinkedList list() {
        final LinkedList results = new LinkedList();


        for(String[] line : lines) {
            if(matches(line)) {
                results.add(line);
            }
        }

        return results;
    }

    public int count() {
        return CollectionUtils.size(list());
    }
}