org.exoplatform.faq.service.search.AnswerSearchResult.java Source code

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Here is the source code for org.exoplatform.faq.service.search.AnswerSearchResult.java

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/*
 * Copyright (C) 2003-2013 eXo Platform SAS.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.exoplatform.faq.service.search;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

import org.apache.commons.lang.ArrayUtils;
import org.exoplatform.faq.service.ObjectSearchResult;

public class AnswerSearchResult implements Collection<ObjectSearchResult> {
    private final long offset;
    private final long limit;
    private final long totalSize;
    private long skip;
    private String[] ids;
    private String[] idsSkip;
    private List<ObjectSearchResult> gotList = null;

    /**
     * Constructor with offset and limit
     * @param offset
     * @param limit
     * @param totalSize total size of nodes matched filter.
     */
    public AnswerSearchResult(long offset, long limit, long totalSize) {
        this.offset = offset;
        this.limit = limit;
        this.totalSize = totalSize;
        ids = new String[0];
        idsSkip = new String[0];
        gotList = new ArrayList<ObjectSearchResult>();
        skip = 0;
    }

    @Override
    public int size() {
        return gotList.size();
    }

    @Override
    public boolean isEmpty() {
        return gotList.isEmpty();
    }

    @Override
    public boolean contains(Object o) {
        if (o instanceof ObjectSearchResult) {
            ObjectSearchResult a = (ObjectSearchResult) o;
            return contains(a.getId());
        }

        //
        return false;
    }

    /**
     * Checks the id whether is existing or not in result list.
     * @param id specified id
     * @return TRUE: existing otherwise FALSE
     */
    public boolean contains(String id) {
        return ArrayUtils.indexOf(ids, id) >= 0;
    }

    /**
     * Add more element into List or not
     * @return
     */
    public boolean addMore() {
        return gotList.size() < limit && gotList.size() < totalSize;
    }

    public long getOffset() {
        return offset;
    }

    public long getLimit() {
        return limit;
    }

    @Override
    public Iterator<ObjectSearchResult> iterator() {
        return gotList.iterator();
    }

    @Override
    public Object[] toArray() {
        return null;
    }

    @Override
    public <T> T[] toArray(T[] a) {
        return null;
    }

    private boolean contains(String[] skipList, Object o) {
        if (o instanceof ObjectSearchResult) {
            ObjectSearchResult a = (ObjectSearchResult) o;
            return ArrayUtils.indexOf(skipList, a.getId()) >= 0;
        }

        //
        return false;
    }

    @Override
    public boolean add(ObjectSearchResult e) {
        if (contains(e)) {
            return false;
        }

        // contains in skipList, what contains offset list
        if (contains(idsSkip, e)) {
            return false;
        }

        //
        if (++skip <= offset) {
            idsSkip = (String[]) ArrayUtils.add(idsSkip, e.getId());
            return false;
        }

        //
        ids = (String[]) ArrayUtils.add(ids, e.getId());
        gotList.add(e);
        return true;
    }

    public List<ObjectSearchResult> result() {
        return gotList;
    }

    @Override
    public boolean remove(Object o) {
        if (o instanceof ObjectSearchResult) {
            ObjectSearchResult a = (ObjectSearchResult) o;
            ids = (String[]) ArrayUtils.removeElement(ids, a.getId());
            return gotList.remove(o);
        }

        //
        return false;
    }

    @Override
    public boolean containsAll(Collection<?> c) {
        return false;
    }

    @Override
    public boolean addAll(Collection<? extends ObjectSearchResult> c) {
        return false;
    }

    @Override
    public boolean removeAll(Collection<?> c) {
        return false;
    }

    @Override
    public boolean retainAll(Collection<?> c) {
        return false;
    }

    @Override
    public void clear() {
        ids = new String[0];
        gotList = new ArrayList<ObjectSearchResult>();
    }
}