org.aliuge.crawler.extractor.selector.NumericaElementCssSelector.java Source code

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Here is the source code for org.aliuge.crawler.extractor.selector.NumericaElementCssSelector.java

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/**
 * 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.aliuge.crawler.extractor.selector;

import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.aliuge.crawler.exception.ExtractException;
import org.aliuge.crawler.extractor.selector.action.IntegerSelectorAction;
import org.aliuge.crawler.extractor.selector.action.SelectorAction;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.math.NumberUtils;
import org.jsoup.select.Elements;

import com.google.common.collect.Lists;

/**
 * @author chenxinwen
 * @date 201481
 * @desc
 */
public class NumericaElementCssSelector extends AbstractElementCssSelector<Number> {

    NumberFormat format;
    Number content;
    private List<IntegerSelectorAction> actions = Lists.newArrayList();

    public NumericaElementCssSelector() {
        super();
    };

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

    public NumericaElementCssSelector(String name, String value, String attr, boolean isRequired, String parttern) {
        super(name, value, attr, isRequired, 0);
        format = new DecimalFormat(parttern);
    }

    @Override
    public Number getContent() throws ExtractException {
        try {
            // content???document2+??
            if (null != content && !newDoc) {
                return content;
            }
            if (null != document) {
                Elements elements = super.document.select(value);
                if (elements.isEmpty())
                    return null;
                String temp;
                switch ($Attr) {
                case text:
                    //temp = CharMatcher.DIGIT.retainFrom(getExtractText(elements));
                    temp = filterDIGITFromString(getExtractText(elements));
                    break;
                default:
                    temp = filterDIGITFromString(getExtractAttr(elements, attr));
                    break;
                }

                if (StringUtils.isNotBlank(temp)) {
                    content = NumberUtils.createNumber(temp);
                    newDoc = false;
                    return content;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            throw new ExtractException("????:" + e.getMessage());
        }
        return null;
    }

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

    private String filterDIGITFromString(String text) {
        Pattern pp = Pattern.compile("\\d+\\.?\\d*");
        Matcher mm = pp.matcher(text);
        if (mm.find()) {
            String temp = mm.group();
            if (temp.endsWith(".")) {
                temp = temp.substring(0, temp.length() - 1);
            }
            return temp;
        }
        return null;
    }

    /**
     * 
     * @return
     */
    public String getContentString() throws ExtractException {
        if (null == content && newDoc) {
            getContent();
        }
        return format.format(this.content);
    }

    public NumberFormat getFormat() {
        return format;
    }

    public void setFormat(NumberFormat format) {
        this.format = format;
    }

    public static void main(String[] args) {
        String str = "\"8\"";
        System.out.println(new NumericaElementCssSelector().filterDIGITFromString(str));
    }

    @SuppressWarnings("unchecked")
    @Override
    public void addAction(SelectorAction action) {
        this.actions.add((IntegerSelectorAction) action);
    }

}