com.saucesubfresh.starter.crawler.parser.BaseElementSelector Maven / Gradle / Ivy

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/*
 * Copyright © the webmagic project
 *
 * 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.saucesubfresh.starter.crawler.parser;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Element;

import java.util.ArrayList;
import java.util.List;

/**
 * @see ...
 */
public abstract class BaseElementSelector implements ElementSelector{

    @Override
    public String select(String text) {
        if (text != null) {
            return select(Jsoup.parse(text));
        }
        return null;
    }

    @Override
    public List selectList(String text) {
        if (text != null) {
            return selectList(Jsoup.parse(text));
        } else {
            return new ArrayList();
        }
    }

    protected Element selectElement(String text) {
        if (text != null) {
            return selectElement(Jsoup.parse(text));
        }
        return null;
    }

    protected List selectElements(String text) {
        if (text != null) {
            return selectElements(Jsoup.parse(text));
        } else {
            return new ArrayList();
        }
    }

    public abstract Element selectElement(Element element);

    public abstract List selectElements(Element element);

    public abstract boolean hasAttribute();
}