[1899] | 1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany
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| 2 | //
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| 3 | // Licensed under the Apache License, Version 2.0 (the "License");
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| 4 | // you may not use this file except in compliance with the License.
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| 5 | // You may obtain a copy of the License at
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| 6 | //
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| 7 | // http://www.apache.org/licenses/LICENSE-2.0
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| 8 | //
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| 9 | // Unless required by applicable law or agreed to in writing, software
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| 10 | // distributed under the License is distributed on an "AS IS" BASIS,
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| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 12 | // See the License for the specific language governing permissions and
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| 13 | // limitations under the License.
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| 14 |
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| 15 | package de.ugoe.cs.util.console;
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| 16 |
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| 17 | import java.io.PrintWriter;
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| 18 | import java.text.SimpleDateFormat;
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| 19 | import java.util.Date;
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| 20 | import java.util.logging.Level;
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| 21 |
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| 22 | import de.ugoe.cs.util.console.listener.IErrorListener;
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| 23 | import de.ugoe.cs.util.console.listener.IExceptionListener;
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| 24 | import de.ugoe.cs.util.console.listener.IOutputListener;
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| 25 | import de.ugoe.cs.util.console.listener.ITraceListener;
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| 26 |
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| 27 | /**
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| 28 | * <p>
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| 29 | * A listener that gets a PrintWriter and outputs all information to that PrintWriter.
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| 30 | * </p>
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| 31 | *
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| 32 | * @author Steffen Herbold
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| 33 | */
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| 34 | public class PrintWriterListener implements IOutputListener, IErrorListener, ITraceListener,
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| 35 | IExceptionListener
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| 36 | {
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| 37 |
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| 38 | /**
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| 39 | * <p>
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| 40 | * Defines the trace level used by this console.
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| 41 | * </p>
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| 42 | */
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| 43 | private Level traceLevel;
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| 44 |
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| 45 | private final SimpleDateFormat ft = new SimpleDateFormat("HH:mm:ss");
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| 46 |
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| 47 | private final PrintWriter out;
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| 48 |
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| 49 | /**
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| 50 | * <p>
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| 51 | * Creates a new PrintWriterListener. The trace level is {@link Level#WARNING}.
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| 52 | * </p>
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| 53 | */
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| 54 | public PrintWriterListener(PrintWriter out) {
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| 55 | this(out, Level.WARNING);
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| 56 | }
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| 57 |
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| 58 | /**
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| 59 | * <p>
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| 60 | * Creates a new PrintWriterListener.
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| 61 | * </p>
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| 62 | *
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| 63 | * @param traceLevel
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| 64 | * trace level used by this text console
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| 65 | */
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| 66 | public PrintWriterListener(PrintWriter out, Level traceLevel) {
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| 67 | this.out = out;
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| 68 | this.traceLevel = traceLevel;
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| 69 | }
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| 70 |
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| 71 | /**
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| 72 | * <p>
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| 73 | * Prints messages to out.
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| 74 | * </p>
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| 75 | *
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| 76 | * @see ConsoleObserver#outputMsg(java.lang.String)
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| 77 | */
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| 78 | public void outputMsg(String newMessage) {
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| 79 | out.print(newMessage);
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| 80 | }
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| 81 |
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| 82 | /**
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| 83 | * <p>
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| 84 | * Prints messages to out.
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| 85 | * </p>
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| 86 | *
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| 87 | * @see ConsoleObserver#errorMsg(String)
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| 88 | */
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| 89 | @Override
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| 90 | public void errorMsg(String errMessage) {
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| 91 | out.print(errMessage);
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| 92 | }
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| 93 |
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| 94 | /**
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| 95 | * <p>
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| 96 | * Prints the stacktrace of an exception to out if the log level is more or equally detailed to
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| 97 | * <code>Level.FINE</code>. Otherwise, it just prints a line naming the exception or only the
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| 98 | * message, if any.
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| 99 | * </p>
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| 100 | *
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| 101 | * @see ConsoleObserver#logException(Exception)
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| 102 | */
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| 103 | @Override
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| 104 | public void logException(Exception e) {
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| 105 | if (traceLevel.intValue() > Level.FINE.intValue()) {
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| 106 | if (e.getMessage() != null) {
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| 107 | out.println(e.getMessage());
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| 108 | }
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| 109 | else {
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| 110 | out.println(e);
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| 111 | }
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| 112 | }
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| 113 | else {
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| 114 | e.printStackTrace(out);
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| 115 | }
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| 116 | }
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| 117 |
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| 118 | /**
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| 119 | * <p>
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| 120 | * Prints messages to out. These message are only printed if the trace level is higher than the
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| 121 | * defined minimum.
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| 122 | * </p>
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| 123 | */
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| 124 | @Override
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| 125 | public void traceMsg(String traceMessage, Level level) {
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| 126 | if (level.intValue() >= traceLevel.intValue()) {
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| 127 | out.print("[" + level.toString() + "] [" + ft.format(new Date()) + "] " + traceMessage);
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| 128 | }
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| 129 | }
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| 130 | }
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