messenger/src/main/java/arhangel/dim/container/BeanXmlReader.java at ba90db684a1e5e75de29a8c0dccd5f77b201db91 · arhangeldim/messenger · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
package arhangel.dim.container;

/**
 * Created by nexx0f on 15.03.16.
 */

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.ParserConfigurationException;

import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;

import org.xml.sax.SAXException;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;


/**
 *
 */
public class BeanXmlReader {
    private static final String TAG_BEAN = "bean";
    private static final String TAG_PROPERTY = "property";
    private static final String ATTR_NAME = "name";
    private static final String ATTR_VALUE = "val";
    private static final String ATTR_REF = "ref";
    private static final String ATTR_BEAN_ID = "id";
    private static final String ATTR_BEAN_CLASS = "class";

    public List<Bean> parseBeans(String pathToFile) throws InvalidConfigurationException, ParserConfigurationException, IOException, SAXException {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        factory.setValidating(false);
        factory.setSchema(null);
        factory.setIgnoringElementContentWhitespace(true);
        List<Bean> beanList = new ArrayList<>();

        DocumentBuilder builder = factory.newDocumentBuilder(); //throws ParserConfigurationException
        File file = new File(pathToFile);
        Document doc = builder.parse(file); //throws IOException
        Element root = doc.getDocumentElement();
        NodeList beanNodes = root.getElementsByTagName(TAG_BEAN);
        for (int nodeIndex = 0; nodeIndex < beanNodes.getLength(); nodeIndex++) {
            Node beanNode = beanNodes.item(nodeIndex);
            if (beanNode.getNodeType() == Node.ELEMENT_NODE) {
                Element beanElement = (Element) beanNode;

                String beanId = beanElement.getAttribute(ATTR_BEAN_ID);
                String beanClass = beanElement.getAttribute(ATTR_BEAN_CLASS);
                NodeList beanPropertyNodes = beanElement.getElementsByTagName(TAG_PROPERTY);
                Map<String, Property> properties = new HashMap<>();
                for (int propertyIndex = 0; propertyIndex < beanPropertyNodes.getLength(); propertyIndex++) {
                    Node beanPropertyNode = beanPropertyNodes.item(propertyIndex);
                    if (beanPropertyNode.getNodeType() == Node.ELEMENT_NODE) {
                        Element beanPropertyElement = (Element) beanPropertyNode;

                        String propertyName = beanPropertyElement.getAttribute(ATTR_NAME);
                        Property property = null;
                        if (beanPropertyElement.hasAttribute(ATTR_VALUE)) {
                            String propertyValue = beanPropertyElement.getAttribute(ATTR_VALUE);
                            property = new Property(propertyName, propertyValue, ValueType.VAL);
                        } else if (beanPropertyElement.hasAttribute(ATTR_REF)) {
                            String propertyRef = beanPropertyElement.getAttribute(ATTR_REF);
                            property = new Property(propertyName, propertyRef, ValueType.REF);
                        }
                        properties.put(property.getName(), property);
                    }
                    Bean bean = new Bean(beanId, beanClass, properties);
                    beanList.add(bean);
                }
            }
        }
        return beanList;
    }
}