com.ibatis.common.xml.NodeletUtils Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jbatis Show documentation

The jBATIS persistence framework will help you to significantly reduce the amount of Java code that you normally need to access a relational database. iBATIS simply maps JavaBeans to SQL statements using a very simple XML descriptor.

The newest version!

package com.ibatis.common.xml;

import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

import java.util.Properties;

public class NodeletUtils {

    public static boolean getBooleanAttribute(Properties attribs, String name, boolean def) {
        String value = attribs.getProperty(name);
        if (value == null) {
            return def;
        } else {
            return "true".equals(value);
        }
    }

    public static int getIntAttribute(Properties attribs, String name, int def) {
        String value = attribs.getProperty(name);
        if (value == null) {
            return def;
        } else {
            return Integer.parseInt(value);
        }
    }

    public static Properties parseAttributes(Node n) {
        return parseAttributes(n, null);
    }

    public static Properties parseAttributes(Node n, Properties variables) {
        Properties attributes = new Properties();
        NamedNodeMap attributeNodes = n.getAttributes();
        for (int i = 0; i < attributeNodes.getLength(); i++) {
            Node attribute = attributeNodes.item(i);
            String value = parsePropertyTokens(attribute.getNodeValue(), variables);
            attributes.put(attribute.getNodeName(), value);
        }
        return attributes;
    }

    public static String parsePropertyTokens(String string, Properties variables) {
        final String OPEN = "${";
        final char CLOSE = '}';

        String newString = string;
        if (newString != null && variables != null) {
            int start = newString.indexOf(OPEN);
            int end = newString.indexOf(CLOSE);

            while (start >= 0 && end > start) {
                String prepend = newString.substring(0, start);
                String append = newString.substring(end + 1);
                String propName = newString.substring(start + 2, end);
                // ## sunsong
                int commaIndex = propName.indexOf(':');
                String defaultValue = propName;
                if (commaIndex >= 0) {
                    defaultValue = propName.substring(commaIndex + 1);
                    propName = propName.substring(0, commaIndex);
                }

                String propValue = variables.getProperty(propName);
                if (propValue == null) {
                    // ## newString = prepend + propName + append;
                    newString = prepend + defaultValue + append;
                } else {
                    newString = prepend + propValue + append;
                }
                start = newString.indexOf(OPEN);
                end = newString.indexOf(CLOSE);
            }
        }
        return newString;
    }

}