org.sbs.goodcrawler.extractor.selector.SetElementCssSelector.java Source code

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Here is the source code for org.sbs.goodcrawler.extractor.selector.SetElementCssSelector.java

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/**
 * ########################  SHENBAISE'S WORK  ##########################
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.sbs.goodcrawler.extractor.selector;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import org.sbs.goodcrawler.exception.ExtractException;
import org.sbs.goodcrawler.extractor.selector.action.SelectorAction;
import org.sbs.goodcrawler.extractor.selector.action.StringSelectorAction;

import com.google.common.collect.Lists;
import com.google.common.collect.Sets;

/**
 * @author whiteme
 * @param <T>
 * @date 20131013
 * @desc Set?????
 */
public class SetElementCssSelector extends AbstractElementCssSelector<Set<String>> {

    private Set<String> content;
    private List<StringSelectorAction> actions = Lists.newArrayList();

    public SetElementCssSelector() {
        super();
    }

    public SetElementCssSelector(String name, String value, String attr, boolean isRequired, int index,
            String regex) {
        super(name, value, attr, isRequired, index, regex);
    }

    @Override
    public Set<String> getContent() throws ExtractException {
        try {
            if (null != content && !newDoc) {
                return content;
            }
            content = Sets.newLinkedHashSet();
            if (document != null) {
                Elements elements = super.document.select(value);
                if (elements.isEmpty())
                    return null;
                switch ($Attr) {
                case text:
                    for (Element e : elements) {
                        content.add(e.text());
                    }
                    break;
                default:
                    for (Element e : elements) {
                        content.add(e.attr(attr));
                    }
                    break;
                }
                if (null != actions && actions.size() > 0) {
                    Set<String> newSet = Sets.newLinkedHashSet();
                    for (String string : content) {
                        String temp = string;
                        for (StringSelectorAction action : actions) {
                            temp = action.doAction(temp);
                        }
                        newSet.add(temp);
                    }
                    this.content = newSet;
                }
                newDoc = false;
                return content;
            }
        } catch (Exception e) {
            e.printStackTrace();
            throw new ExtractException(
                    SetElementCssSelector.class.getSimpleName() + "????:" + e.getMessage());
        }
        return null;
    }

    @Override
    public Map<String, Set<String>> getContentMap() throws ExtractException {
        if (newDoc)
            getContent();
        if (content == null || content.size() == 0)
            return null;
        Map<String, Set<String>> map = new HashMap<>(1);
        map.put(name, this.content);
        return map;
    }

    @Override
    public void addAction(SelectorAction action) {
        this.actions.add((StringSelectorAction) action);
    }

    public List<StringSelectorAction> getActions() {
        return actions;
    }

    public void setActions(List<StringSelectorAction> actions) {
        this.actions = actions;
    }

    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder();
        builder.append("SetElementCssSelector [content=");
        builder.append(content);
        builder.append(", actions=");
        builder.append(actions);
        builder.append(", name=");
        builder.append(name);
        builder.append(", value=");
        builder.append(value);
        builder.append(", attr=");
        builder.append(attr);
        builder.append(", $Attr=");
        builder.append($Attr);
        builder.append(", isRequired=");
        builder.append(isRequired);
        builder.append(", document=");
        builder.append(document);
        builder.append(", newDoc=");
        builder.append(newDoc);
        builder.append("]");
        return builder.toString();
    }

}