edu.ccut.saturn.manager.dict.core.dbmanager.Dom4jUtils.java Source code

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Here is the source code for edu.ccut.saturn.manager.dict.core.dbmanager.Dom4jUtils.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 edu.ccut.saturn.manager.dict.core.dbmanager;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Properties;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

import edu.ccut.saturn.component.SaturnComponentException;
import edu.ccut.saturn.manager.dict.core.Activator;

/**
 * Dom4j Utils
 * 
 * @author LeslieGu
 * 
 */
public abstract class Dom4jUtils {
    private static final String BLANK_STRING = "";

    private static final String POINT = ".";

    private static final String LOG4J_PROPERTIES = "\\WEB-INF\\classes\\log4j.properties";

    private static final String TRUE = "true";

    public static Document getDocment(String file) throws Exception {

        InputStream in = null;
        try {
            in = new FileInputStream(file);
        } catch (Exception e) {
            e.printStackTrace();
            in = Dom4jUtils.class.getResourceAsStream(file);
        }
        if (in == null) {
            throw new SaturnComponentException("Can not find config file.");
        }
        SAXReader reader = new SAXReader();
        Document document = null;
        try {
            document = reader.read(in);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return document;
    }

    public static Document getDocment(InputStream in) throws Exception {

        if (in == null) {
            throw new SaturnComponentException("Can not find config file.");
        }
        SAXReader reader = new SAXReader();
        Document document = null;
        try {
            document = reader.read(in);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return document;
    }

    public static String writeXml(String file, Document doc) {

        String message = null;
        XMLWriter writer = null;
        OutputFormat format = OutputFormat.createPrettyPrint();
        format.setEncoding("GB2312");
        format.setIndent(true);
        format.setIndent(" ");
        format.setNewlines(true);
        OutputStream out = null;
        try {
            out = new FileOutputStream(file);
        } catch (FileNotFoundException e1) {
            try {
                String path = Thread.currentThread().getContextClassLoader().getResource(BLANK_STRING).getFile()
                        + file.substring(1);

                out = new FileOutputStream(path);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }
        }
        try {
            writer = new XMLWriter(out, format);
            writer.write(doc);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                writer.close();
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        message = TRUE;
        return message;
    }

    @SuppressWarnings("unchecked")
    public static Element readXmlForElement(String file) throws Exception {

        Document document = null;
        document = Dom4jUtils.getDocment(file);
        if (document == null) {
            throw new SaturnComponentException("Can not create Document.");
        }
        Element root = document.getRootElement();
        if (root == null) {
            throw new SaturnComponentException("The config file don't have element.");

        }
        return root;
    }

    @SuppressWarnings("unchecked")
    public static Properties getPropertiesKey(String file) throws Exception {

        String serverLocation = Activator.getServerLocation();
        Properties properties = new Properties();
        InputStream in = null;
        try {
            in = new FileInputStream(serverLocation + LOG4J_PROPERTIES);
            properties.load(in);
        } catch (Exception e) {
            in = Dom4jUtils.class.getResourceAsStream(file);
        } finally {
            try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (properties.size() <= 0) {
            throw new SaturnComponentException("Can not read properties file.");
        }
        return properties;
    }

    public static String getBeforeStr(String property) {

        String returnStr = BLANK_STRING;
        int secondPos = property.indexOf(POINT, property.indexOf(POINT) + 1);
        if (secondPos > -1) {
            return property.substring(0, secondPos);
        }
        return returnStr;
    }

    public static String getAfterStr(String property) {

        String returnStr = BLANK_STRING;
        int firstPos = property.indexOf(POINT);
        int secondPos = property.indexOf(POINT, property.indexOf(POINT) + 1);
        if (firstPos > -1 && secondPos > -1) {
            return property.substring(secondPos + 1, property.length());
        }
        return returnStr;
    }
}