Java XML String Transform createObject(String classname)

Description

create an object using reflection Examples JDReflectionUtil.createObject("com.ibm.db2.jcc.DB2XADataSource") callMethod_V(ds, "setTranslateHex", "character");

License

Open Source License

Declaration

public static Object createObject(String classname) throws Exception 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.lang.reflect.Constructor;

public class Main {
    /**//from  w w w .  j  av a 2s. co m
     * create an object using reflection
     * Examples
     *
     *  JDReflectionUtil.createObject("com.ibm.db2.jcc.DB2XADataSource")
     * 
     *  callMethod_V(ds, "setTranslateHex", "character"); 
     */

    public static Object createObject(String classname) throws Exception {

        Class objectClass1 = Class.forName(classname);
        Class[] noArgTypes = new Class[0];
        Object[] noArgs = new Object[0];
        Object newObject = null;
        try {
            Constructor constructor = objectClass1.getConstructor(noArgTypes);

            newObject = constructor.newInstance(noArgs);
        } catch (java.lang.reflect.InvocationTargetException ite) {
            handleIte(ite);

        }
        return newObject;
    }

    /**
     * create an object using reflection
     * Examples
     *
     *  JDReflectionUtil.createObject("com.ibm.db2.app.DB2RowId", testArray)
     * 
     */

    public static Object createObject(String classname, byte[] arg) throws Exception {

        Class objectClass1 = Class.forName(classname);
        Class[] oneArgTypes = new Class[1];
        oneArgTypes[0] = Class.forName("[B");
        Object[] oneArgs = new Object[1];
        oneArgs[0] = arg;
        Object newObject = null;
        try {
            Constructor constructor = objectClass1.getDeclaredConstructor(oneArgTypes); //@pdc find protected constructor also

            constructor.setAccessible(true); //@PDA allo call of protected.
            newObject = constructor.newInstance(oneArgs);
        } catch (java.lang.reflect.InvocationTargetException ite) {
            handleIte(ite);

        }
        return newObject;
    }

    /**
     * create an object using reflection
     * Examples
     *
     *  JDReflectionUtil.createObject("javax.xml.transform.stax.StAXSource", "javax.xml.stream.XMLStreamReader", xmlStreamReader); 
     *  
     */

    public static Object createObject(String classname, String parameterClass, Object arg) throws Exception {

        Class objectClass1 = Class.forName(classname);
        Class[] oneArgTypes = new Class[1];
        oneArgTypes[0] = Class.forName(parameterClass);
        Object[] oneArgs = new Object[1];
        oneArgs[0] = arg;
        Object newObject = null;
        try {
            Constructor constructor = objectClass1.getDeclaredConstructor(oneArgTypes);

            constructor.setAccessible(true);
            newObject = constructor.newInstance(oneArgs);
        } catch (java.lang.reflect.InvocationTargetException ite) {
            handleIte(ite);

        }
        return newObject;
    }

    public static void handleIte(java.lang.reflect.InvocationTargetException ite) throws Exception {
        Throwable target = ite.getTargetException();
        if (target instanceof Exception) {
            throw (Exception) target;
        } else {
            target.printStackTrace();
            throw new Exception("Throwable " + target.toString() + " encountered.  See STDOUT for stack trace ");
        }

    }
}

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