summarymessagewriterdecorator.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: SummaryMessageWriterDecorator.java,v 1.2 2003/11/07 21:34:22 per_nyfelt Exp $
package org.ozoneDB.tools.OPP.message;

import org.ozoneDB.tools.OPP.message.MessageWriter;

import java.text.Format;
import java.text.NumberFormat;
import java.util.Stack;

public class SummaryMessageWriterDecorator implements MessageWriter {
    private class Summary {
        private int warnings;
        private int errors;
        private long startTime;
        private String object = "";

        public int getWarnings() {
            return warnings;
        }

        public int getErrors() {
            return errors;
        }

        public long getStartTime() {
            return startTime;
        }

        public String getObject() {
            return object;
        }

        public void incWarnings() {
            warnings++;
        }

        public void incErrors() {
            errors++;
        }

        public Summary(String object) {
            startTime = System.currentTimeMillis();
            this.object = object;
        }

        public long getTotalTime() {
            return System.currentTimeMillis() - startTime;
        }

        public void addSummary(Summary summary) {
            if (summary != null) {
                warnings += summary.warnings;
                errors += summary.errors;
            }
        }
    }

    private MessageWriter listener;
    private Stack summaries = new Stack();
    private Summary currentSummary;
    private StringBuffer indent = new StringBuffer();

    private void updateIndent(int count) {
        indent.delete(0, indent.length());
        for (int i = 0; i < count; i++) {
            indent.append("   ");
        }
    }

    public SummaryMessageWriterDecorator(MessageWriter listener) {
        this.listener = listener;
    }

    public void startGeneration(String object) {
        info("Begin " + object + "...");
        currentSummary = new Summary(object);
        summaries.push(currentSummary);
        updateIndent(summaries.size());
    }

    public void error(String message) {
        currentSummary.incErrors();
        listener.error(indent + message);
    }

    public void warning(String message) {
        currentSummary.incWarnings();
        listener.warning(indent + message);
    }

    public void warning(String filename, int row, String message) {
        currentSummary.incWarnings();
        listener.warning(indent + filename, row, message);
    }

    public void info(String message) {
        listener.info(indent + message);
    }

    public void debug(String message) {
        listener.debug(indent + message);
    }

    public void endGeneration() {
        Summary tmpSummary = (Summary) summaries.pop();
        tmpSummary.addSummary(currentSummary);
        currentSummary = tmpSummary;
        updateIndent(summaries.size());
        if (summaries.size() == 0) {
            double generationTime = currentSummary.getTotalTime();
            generationTime /= 1000;
            Format fmt = NumberFormat.getInstance();
            info("End " + currentSummary.getObject() + " generated in " + fmt.format(new Double(generationTime)) + " seconds.");
            info("Generation completed with " + currentSummary.getWarnings() + " warnings and " + currentSummary.getErrors() + " errors");
        } else {
            info("End " + currentSummary.object);
        }
    }
}