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Open HTML to PDF is a CSS 2.1 renderer written in Java. This artifact contains the core rendering and layout code.

There is a newer version: 1.0.10

package com.openhtmltopdf.util;

import java.util.logging.Level;
import java.util.regex.Pattern;

public class Diagnostic {

    private static final Pattern MESSAGE_FORMAT_PLACEHOLDER = Pattern.compile("\\{\\}");

    private final Level level;
    private final LogMessageId logMessageId;
    private final Object[] args;
    private final Throwable error;

    Diagnostic(Level level, LogMessageId logMessageId, boolean hasError, Object[] args) {
        this.level = level;
        this.logMessageId = logMessageId;
        this.args = args;
        this.error = hasError ? (Throwable) args[args.length - 1] : null;
    }

    public LogMessageId getLogMessageId() {
        return logMessageId;
    }

    public Level getLevel() {
        return level;
    }

    public boolean hasError() {
        return error != null;
    }

    public Throwable getError() {
        return error;
    }

    public String getFormattedMessage() {
        if (logMessageId instanceof LogMessageId.LogMessageId0Param) {
            return logMessageId.getMessageFormat();
        } else {
            return String.format(MESSAGE_FORMAT_PLACEHOLDER.matcher(logMessageId.getMessageFormat()).replaceAll("%s"), args);
        }
    }

    public Object[] getArgs() {
        return args;
    }
}