methodnameupgradingclassbuilderdecorator.java

Java的面向对象数据库系统的源代码

// 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-@year@ by SMB GmbH. All rights reserved.
//
// $Id$
package org.ozoneDB.tools.OPP.srcgen.builder;

import org.ozoneDB.tools.OPP.srcgen.ClassBuilder;
import org.ozoneDB.tools.OPP.srcgen.BuilderException;
import org.ozoneDB.tools.OPP.message.MessageWriter;
import org.ozoneDB.core.Lock;

import java.util.regex.Pattern;
import java.util.regex.Matcher;

/**
 * User: Jocke
 * Date: 2004-jan-04
 * Time: 14:21:57
 */
public class MethodNameUpgradingClassBuilderDecorator implements ClassBuilder {
    private ClassBuilder classBuilder;
    private MessageWriter msgWriter;
    private Pattern updateMethodPattern;

    public MethodNameUpgradingClassBuilderDecorator(ClassBuilder classBuilder, String updateMethodExpression) {
        this.classBuilder = classBuilder;
        this.updateMethodPattern = Pattern.compile(updateMethodExpression);
    }

    public void init(MessageWriter msgWriter) {
        this.msgWriter = msgWriter;
        classBuilder.init(msgWriter);
    }

    public void beginClass(int modifier, String fullName, String superClass, String interfaces[]) throws BuilderException {
        classBuilder.beginClass(modifier, fullName, superClass, interfaces);
    }

    public void makeConstructor(int modifier, ClassBuilder.Parameter parameters[], String exceptions[]) throws BuilderException {
        classBuilder.makeConstructor(modifier, parameters, exceptions);
    }

    public void makeMethod(int modifier, String name, ClassBuilder.Parameter parameters[], String returnType, String exceptions[], int lockLevel) throws BuilderException {
        Matcher matcher = updateMethodPattern.matcher(name);
        if (matcher.matches()) {
            msgWriter.debug("method: " + name + " matches expression \"" + updateMethodPattern.pattern() + "\"");
            if (lockLevel < Lock.LEVEL_WRITE) {
                msgWriter.info("Upgrading method: " + name + " to lock level WRITE");
                lockLevel = Lock.LEVEL_WRITE;
            } else {
                msgWriter.info("method: " + name + " is already defined as an update method, doing nothing!");
            }
        }
        classBuilder.makeMethod(modifier, name, parameters, returnType, exceptions, lockLevel);
    }

    public void endClass() throws BuilderException {
        classBuilder.endClass();
    }
}