ifhelper.java

用Java写的面相对象的数据库管理系统

// You can redistribute this software and/or modify it under the terms of
// the Ozone Library License version 1 published by ozone-db.org.
//
// The original code and portions created by SMB are
// Copyright (C) 1997-2000 by SMB GmbH. All rights reserved.
//
// $Id: IfHelper.java,v 1.9 2000/10/28 16:55:20 daniela Exp $

package org.ozoneDB.tools.OPP;

import java.io.*;
import java.lang.reflect.*;
//import org.apache.regexp.*;
import org.ozoneDB.DxLib.*;


/**
 * Helper class that allows to parse the Java source code of interface files
 * to find out extra class information.
 * 
 * 
 * @author <a href="http://www.softwarebuero.de/">SMB</a>
 * @version $Revision: 1.9 $Date: 2000/10/28 16:55:20 $
 */
class IfHelper {
    
    protected Class cl;
    
    protected Class dbInterface;
    
    protected boolean quiet;
    
    protected Object re;
    
    protected String outputDir;
    
    /**
     * Names of update methods as Strings.
     */
    protected DxHashMap updateMethodsIf = new DxHashMap();
    
    
    public IfHelper( Class _cl, String _outputDir, boolean _quiet ) {
        cl = _cl;
        outputDir = _outputDir;
        quiet = _quiet;
    }
    
    
    /**
     * Search all remote interfaces (implement OzoneRemote) for update methods.
     */
    public void searchUpdateMethods( DxHashMap updateMethodsIf ) throws Exception {
        Class dbRemote = Class.forName( "org.ozoneDB.OzoneRemote" );
        Class[] ifs = cl.getInterfaces();
        for (int i = 0; i < ifs.length; i++) {
            if (dbRemote.isAssignableFrom( ifs[i] ) && !dbRemote.equals( ifs[i] )) {
                searchUpdateMethods( ifs[i], updateMethodsIf );
            } 
        } 
    } 
    
    
    /**
     * Search all methods that are marked in the source code of the remote
     * Java interface.
     */
    public void searchUpdateMethods( Class dbInterface, DxHashMap updateMethodsIf ) throws Exception {
        
        Object re = OPPHelper.newRE( OPP.UPDATE_SIGN, true );
        Object mre = OPPHelper.newRE( OPP.METHOD_PATTERN, false );
        
        //search *.java source in current and in output directory
        String sourceName = OPPHelper.rawClassName( dbInterface ) + ".java";
        
        if (!quiet) {
            System.out.print( "      trying to process " + sourceName + "... " );
        } 
        
        if (!new File( sourceName ).exists()) {
            sourceName = outputDir + OPPHelper.rawClassName( dbInterface ) + ".java";
            if (!new File( sourceName ).exists()) {
                if (!quiet) {
                    System.out.println( " no interface file found." );
                } 
                return;
            } 
        } 
        
        if (!quiet) {
            System.out.println( "(" + sourceName + ")" );
        } 
        
        LineNumberReader in = new LineNumberReader( new FileReader( sourceName ) );
        String line = in.readLine();
        while (line != null) {
            // System.out.println (line);
            boolean isUpdate = OPPHelper.reSearch( re, line, 0, 0 ) != null;
            String match = OPPHelper.reSearch( mre, line, 0, 1 );
            // if (isUpdate)
            //     System.out.println ("UPDATE: method=" + match);
            
            if (match != null && isUpdate) {
                String methodName = match;
                // System.out.println ("method: " + methodName);
                updateMethodsIf.addForKey( methodName, methodName );
            } else if (match == null && isUpdate) {
                OPPHelper.warnMsg( OPPHelper.rawClassName( dbInterface ) + ".java", in.getLineNumber(),
                        "Unable to determine method name." );
            } else {
                if (match != null && !isUpdate) {
                    String methodName = match;
                    if (updateMethodsIf.contains( methodName )) {
                        OPPHelper.warnMsg( OPPHelper.rawClassName( dbInterface ) + ".java", in.getLineNumber(),
                                "All '" + methodName + "' methods will be marked as update methods." );
                    } 
                } 
            } 
            line = in.readLine();
        } 
        in.close();
    } 
    
}