org.aliuge.crawler.extractor.selector.action.string.StringSubAction.java Source code

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Here is the source code for org.aliuge.crawler.extractor.selector.action.string.StringSubAction.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.action.string;

import org.aliuge.crawler.extractor.selector.action.StringSelectorAction;
import org.apache.commons.lang3.StringUtils;

/**
 * @author 
 * @date 2014911
 * @desc ?Action<br>
 * "4,4"??4.<br>
 * "4"4??
 */
public class StringSubAction extends StringSelectorAction {
    /**
     * ??
     */
    int pos = 0;
    /**
     * ?
     */
    String spos = "";
    /**
     * ?
     */
    int lenth = 0;

    /**
     * "4,4"??4.<br>
     * "4"4??
     * @param subExpression
     */
    public StringSubAction(String subExpression) {
        if (StringUtils.isNotBlank(subExpression)) {
            String[] ss = StringUtils.split(subExpression, ",");
            if (ss.length == 1) {
                if (StringUtils.isNumeric(ss[0])) {
                    this.pos = Integer.parseInt(ss[0]);
                } else {
                    this.spos = ss[0];
                }
            } else if (ss.length == 2) {
                if (StringUtils.isNumeric(ss[0])) {
                    this.pos = Integer.parseInt(ss[0]);
                } else {
                    this.spos = ss[0];
                }
                this.lenth = Integer.parseInt(ss[1]);
            }
        }
    }

    /**
     * ???
     */
    @Override
    public String doAction(String content) {
        if (StringUtils.isNotBlank(content)) {
            if (StringUtils.isNotBlank(spos)) {
                this.pos = content.indexOf(spos) + spos.length();
            }
            if (this.lenth == 0 && this.pos > 0) {
                content = StringUtils.substring(content, this.pos);
            } else if (this.lenth > 0 && this.pos >= 0) {
                content = StringUtils.substring(content, this.pos, this.pos + this.lenth);
            }
            return content;
        }
        return "";
    }

    public static void main(String[] args) {
        String string = "234dfs454#$%gasfdjlkas";
        StringSubAction actiong = new StringSubAction("3,4");
        System.out.println(actiong.doAction(string));

        StringSubAction action2 = new StringSubAction("gas,4");
        System.out.println(action2.doAction(string));
    }
}