exceptionstrategy.java

一个java 代码生成器

/**
 * Copyright (c) 2002, Siddhartha P. Chandurkar [e-mail]
 * All rights reserved.
 * Licensed under the Academic Free License version 1.1
 * See the file LICENSE.TXT for details.
 * LICENSE.txt is located in the directory  <install-directory>\Jenerator
 * of your Jenertaor Installation.
 *
 */

package com.jenerator.transformer;

import com.jenerator.struct.ConfigStructs;
import com.jenerator.struct.ejb.EntityStruct;
import com.jenerator.struct.ejb.MDBStruct;
import com.jenerator.struct.ejb.SessionStruct;
import com.jenerator.util.Configurator;
import org.apache.log4j.Logger;

import java.util.Enumeration;
import java.util.Hashtable;
import java.util.StringTokenizer;
import java.util.Vector;

/**
 * ExceptionStrategy
 * This class is used for generating Exceptions.
 *
 * @author Siddhartha P. Chandurkar
 * @version 0.9.0
 */
public class ExceptionStrategy extends TransformStrategy {

    //ATTRIBUTES
    private Logger log = Logger.getLogger(com.jenerator.transformer.BeanStrategy.class.getName());


    //METHODS
    /**
     *
     *
     */
    public void transform() throws TransformFailedException {

        try {
            ConfigStructs configStructs = Configurator.getInstance().getConfigStructs();
            Vector ejbStructs = configStructs.getEjbStructs();
            for (int i = 0; i < ejbStructs.size(); i++) {
                if (ejbStructs.elementAt(i) instanceof com.jenerator.struct.ejb.EntityStruct) {
                    EntityStruct entityStruct = (EntityStruct) ejbStructs.elementAt(i);
                    Hashtable methodSigs = entityStruct.getMethodSignatures();
                    if (!methodSigs.isEmpty()) {
                        Enumeration keys = methodSigs.keys();
                        while (keys.hasMoreElements()) {
                            String signature = keys.nextElement().toString();
                            String exceptions = methodSigs.get(signature).toString();
                            StringTokenizer tokens = new StringTokenizer(exceptions, ",");
                            while (tokens.hasMoreTokens()) {
                                String name = tokens.nextToken().trim();
                                if (!name.equals("null"))
                                    processor.process(makeXmlForException(entityStruct.getPackageName(), name), "exception.xsl", name + ".java", entityStruct.getPackageDir());
                            }
                        }

                    }

                } else if (ejbStructs.elementAt(i) instanceof com.jenerator.struct.ejb.SessionStruct) {
                    SessionStruct sessionStruct = (SessionStruct) ejbStructs.elementAt(i);
                    Hashtable methodSigs = sessionStruct.getMethodSignatures();
                    if (!methodSigs.isEmpty()) {
                        Enumeration keys = methodSigs.keys();
                        while (keys.hasMoreElements()) {
                            String signature = keys.nextElement().toString();
                            String exceptions = methodSigs.get(signature).toString();
                            StringTokenizer tokens = new StringTokenizer(exceptions, ",");
                            while (tokens.hasMoreTokens()) {
                                String name = tokens.nextToken().trim();
                                if (!name.equals("null"))
                                    processor.process(makeXmlForException(sessionStruct.getPackageName(), name), "exception.xsl", name + ".java", sessionStruct.getPackageDir());
                            }
                        }

                    }
                } else if (ejbStructs.elementAt(i) instanceof com.jenerator.struct.ejb.MDBStruct) {
                    MDBStruct mdbStruct = (MDBStruct) ejbStructs.elementAt(i);
                    Hashtable methodSigs = mdbStruct.getMethodSignatures();
                    if (!methodSigs.isEmpty()) {
                        Enumeration keys = methodSigs.keys();
                        while (keys.hasMoreElements()) {
                            String signature = keys.nextElement().toString();
                            String exceptions = methodSigs.get(signature).toString();
                            StringTokenizer tokens = new StringTokenizer(exceptions, ",");
                            while (tokens.hasMoreTokens()) {
                                String name = tokens.nextToken().trim();
                                if (!name.equals("null"))
                                    processor.process(makeXmlForException(mdbStruct.getPackageName(), name), "exception.xsl", name + ".java", mdbStruct.getPackageDir());
                            }
                        }

                    }
                }

            }


        } catch (NotProcessableException ex) {
            log.fatal(ex);
            throw new TransformFailedException(ex);
        }
    }

    /**
     *
     */
    private String makeXmlForException(String _package, String _name) {
        StringBuffer xmlBuffer = new StringBuffer();
        xmlBuffer.append("<?xml version='1.0'?>");
        xmlBuffer.append("<exception>");
        xmlBuffer.append("<package>");
        xmlBuffer.append(_package);
        xmlBuffer.append("</package>");
        xmlBuffer.append("<name>");
        xmlBuffer.append(_name);
        xmlBuffer.append("</name>");
        xmlBuffer.append("</exception>");
        return xmlBuffer.toString();

    }
}