Commit 878f1cc4 authored by Dominik Gruntz's avatar Dominik Gruntz
Browse files

03_Observer2

parent 1abd2969
plugins {
id 'java'
}
repositories {
mavenCentral()
}
sourceCompatibility = 11
targetCompatibility = 11
compileJava.options.encoding = 'UTF-8'
compileTestJava.options.encoding = 'UTF-8'
def currentOS = org.gradle.internal.os.OperatingSystem.current()
def platform
if (currentOS.isWindows()) {
platform = 'win'
} else if (currentOS.isLinux()) {
platform = 'linux'
} else if (currentOS.isMacOsX()) {
platform = 'mac'
}
dependencies {
implementation "org.openjfx:javafx-base:11:${platform}"
}
dependencies {
implementation 'org.junit.jupiter:junit-jupiter:5.8.0'
}
test {
useJUnitPlatform()
}
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
#!/bin/sh
#
# Copyright © 2015-2021 the original authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
##############################################################################
#
# Gradle start up script for POSIX generated by Gradle.
#
# Important for running:
#
# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
# noncompliant, but you have some other compliant shell such as ksh or
# bash, then to run this script, type that shell name before the whole
# command line, like:
#
# ksh Gradle
#
# Busybox and similar reduced shells will NOT work, because this script
# requires all of these POSIX shell features:
# * functions;
# * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
# «${var#prefix}», «${var%suffix}», and «$( cmd )»;
# * compound commands having a testable exit status, especially «case»;
# * various built-in commands including «command», «set», and «ulimit».
#
# Important for patching:
#
# (2) This script targets any POSIX shell, so it avoids extensions provided
# by Bash, Ksh, etc; in particular arrays are avoided.
#
# The "traditional" practice of packing multiple parameters into a
# space-separated string is a well documented source of bugs and security
# problems, so this is (mostly) avoided, by progressively accumulating
# options in "$@", and eventually passing that to Java.
#
# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
# see the in-line comments for details.
#
# There are tweaks for specific operating systems such as AIX, CygWin,
# Darwin, MinGW, and NonStop.
#
# (3) This script is generated from the Groovy template
# https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
# within the Gradle project.
#
# You can find Gradle at https://github.com/gradle/gradle/.
#
##############################################################################
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
app_path=$0
# Need this for daisy-chained symlinks.
while
APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path
[ -h "$app_path" ]
do
ls=$( ls -ld "$app_path" )
link=${ls#*' -> '}
case $link in #(
/*) app_path=$link ;; #(
*) app_path=$APP_HOME$link ;;
esac
done
APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
APP_NAME="Gradle"
APP_BASE_NAME=${0##*/}
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD=maximum
warn () {
echo "$*"
} >&2
die () {
echo
echo "$*"
echo
exit 1
} >&2
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
nonstop=false
case "$( uname )" in #(
CYGWIN* ) cygwin=true ;; #(
Darwin* ) darwin=true ;; #(
MSYS* | MINGW* ) msys=true ;; #(
NONSTOP* ) nonstop=true ;;
esac
CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD=$JAVA_HOME/jre/sh/java
else
JAVACMD=$JAVA_HOME/bin/java
fi
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD=java
which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
# Increase the maximum file descriptors if we can.
if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
case $MAX_FD in #(
max*)
MAX_FD=$( ulimit -H -n ) ||
warn "Could not query maximum file descriptor limit"
esac
case $MAX_FD in #(
'' | soft) :;; #(
*)
ulimit -n "$MAX_FD" ||
warn "Could not set maximum file descriptor limit to $MAX_FD"
esac
fi
# Collect all arguments for the java command, stacking in reverse order:
# * args from the command line
# * the main class name
# * -classpath
# * -D...appname settings
# * --module-path (only if needed)
# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
# For Cygwin or MSYS, switch paths to Windows format before running java
if "$cygwin" || "$msys" ; then
APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
JAVACMD=$( cygpath --unix "$JAVACMD" )
# Now convert the arguments - kludge to limit ourselves to /bin/sh
for arg do
if
case $arg in #(
-*) false ;; # don't mess with options #(
/?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath
[ -e "$t" ] ;; #(
*) false ;;
esac
then
arg=$( cygpath --path --ignore --mixed "$arg" )
fi
# Roll the args list around exactly as many times as the number of
# args, so each arg winds up back in the position where it started, but
# possibly modified.
#
# NB: a `for` loop captures its iteration list before it begins, so
# changing the positional parameters here affects neither the number of
# iterations, nor the values presented in `arg`.
shift # remove old arg
set -- "$@" "$arg" # push replacement arg
done
fi
# Collect all arguments for the java command;
# * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
# shell script including quotes and variable substitutions, so put them in
# double quotes to make sure that they get re-expanded; and
# * put everything else in single quotes, so that it's not re-expanded.
set -- \
"-Dorg.gradle.appname=$APP_BASE_NAME" \
-classpath "$CLASSPATH" \
org.gradle.wrapper.GradleWrapperMain \
"$@"
# Use "xargs" to parse quoted args.
#
# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
#
# In Bash we could simply go:
#
# readarray ARGS < <( xargs -n1 <<<"$var" ) &&
# set -- "${ARGS[@]}" "$@"
#
# but POSIX shell has neither arrays nor command substitution, so instead we
# post-process each arg (as a line of input to sed) to backslash-escape any
# character that might be a shell metacharacter, then use eval to reverse
# that process (while maintaining the separation between arguments), and wrap
# the whole thing up as a single "set" statement.
#
# This will of course break if any of these variables contains a newline or
# an unmatched quote.
#
eval "set -- $(
printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
xargs -n1 |
sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
tr '\n' ' '
)" '"$@"'
exec "$JAVACMD" "$@"
@rem
@rem Copyright 2015 the original author or authors.
@rem
@rem Licensed under the Apache License, Version 2.0 (the "License");
@rem you may not use this file except in compliance with the License.
@rem You may obtain a copy of the License at
@rem
@rem https://www.apache.org/licenses/LICENSE-2.0
@rem
@rem Unless required by applicable law or agreed to in writing, software
@rem distributed under the License is distributed on an "AS IS" BASIS,
@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@rem See the License for the specific language governing permissions and
@rem limitations under the License.
@rem
@if "%DEBUG%" == "" @echo off
@rem ##########################################################################
@rem
@rem Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal
set DIRNAME=%~dp0
if "%DIRNAME%" == "" set DIRNAME=.
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%
@rem Resolve any "." and ".." in APP_HOME to make it shorter.
for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome
set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if "%ERRORLEVEL%" == "0" goto execute
echo.
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
if exist "%JAVA_EXE%" goto execute
echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:execute
@rem Setup the command line
set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
:end
@rem End local scope for the variables with windows NT shell
if "%ERRORLEVEL%"=="0" goto mainEnd
:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
exit /b 1
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega
package patterns.observer.color;
import java.awt.Color;
@FunctionalInterface
public interface ColorListener {
void colorValueChanged(ColorModel source, Color newColor);
}
package patterns.observer.color;
import java.awt.Color;
import java.util.ArrayList;
import java.util.List;
public class ColorModel {
private Color color = Color.BLACK;
private final List<ColorListener> listeners = new ArrayList<>();
public void addColorListener(ColorListener l) { listeners.add(l); }
public void removeColorListener(ColorListener l) { listeners.remove(l); }
public Color getColor() { return color; }
public void setColor(Color newColor) {
if (!color.equals(newColor)) {
color = newColor;
for (ColorListener l : listeners) {
l.colorValueChanged(this, color);
}
}
}
}
package patterns.observer.color;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.awt.Color;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
public class ColorTest {
private ColorModel model;
private int cnt;
@BeforeEach
public void init() {
model = new ColorModel();
}
@Test
public void test1() {
model.addColorListener((s, c) -> cnt++);
model.setColor(Color.red);
assertEquals(1, cnt);
}
@Test
public void test2() {
model.addColorListener((s, c) -> cnt++);
model.addColorListener((s, c) -> cnt++);
model.setColor(Color.red);
assertEquals(2, cnt);
}
@Test
public void test3() {
model.addColorListener(new ColorListener() {
@Override
public void colorValueChanged(ColorModel source, Color newColor) {
assertEquals(source, model);
assertEquals(newColor, Color.red);
}
});
model.setColor(Color.red);
}
@Test
public void test4() {
model.addColorListener((s, c) -> cnt++);
model.setColor(Color.red);
model.setColor(Color.red);
assertEquals(1, cnt);
}
@Test
public void test5() {
ColorListener l = (s, c) -> cnt++;
model.addColorListener(l);
model.addColorListener(l);
model.setColor(Color.red);
assertEquals(2, cnt);
}
}
package patterns.observer.copyright;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
@SuppressWarnings("serial")
class CopyRightGUI extends JFrame {
private static final String fhnw = "FHNW";
private static final String input = "(c)";
public static void main(String[] args) {
String given = (args.length > 0) ? args[0] : fhnw;
String typeThat = (args.length > 1) ? args[1] : input;
JFrame f = new CopyRightGUI(given, typeThat);
f.setDefaultCloseOperation(EXIT_ON_CLOSE);
f.pack();
f.setVisible(true);
}
CopyRightGUI(final String given, final String typeThat) {
final TextModel m = new TextModel();
CorrectionListener cl = new CorrectionListener(m);
TextListener tl = new TextListener();
m.addListener(cl);
m.addListener(tl);
int pos = 0;
for(char ch : given.toCharArray()) m.insert(pos++, ch);
setLayout(new GridLayout(2, 2, 8, 0));
add(new JLabel("Next change (press button)"));
add(new JLabel("Current Text"));
add(newInsertButton(typeThat, m));
add(tl);
}
private JButton newInsertButton(final String typeThat, final TextModel wm) {
final JButton key = new JButton(buttonText(typeThat.charAt(0), 0));
key.addActionListener(new ActionListener() {
int pos = 0;
@Override
public void actionPerformed(ActionEvent arg0) {
char ch = typeThat.charAt(pos);
wm.insert(pos, ch);
pos++;
if (pos >= typeThat.length()) {
key.setEnabled(false);
} else {
key.setText(buttonText(typeThat.charAt(pos), pos));
}
}
});
return key;
}
private String buttonText(char nextChar, int pos) {
return "insert \"" + nextChar + "\" at position " + pos;
}
}
package patterns.observer.copyright;
public class CorrectionListener implements Listener {
private TextModel text;
public CorrectionListener(TextModel m) {
text = m;
}
@Override
public void notifyDelete(int from, int len) {
}
@Override
public void notifyInsert(int pos, char ch) {
if (pos >= 2) {
String s = text.getSubstring(pos - 2, 3).toUpperCase();
if ("(C)".equals(s)) {
System.out.println("correct on: " + text);
text.delete(pos - 2, 3);
text.insert(pos - 2, '©');
System.out.println("corrected text: " + text);
}
}
}
}
package patterns.observer.copyright;
public interface Listener {
void notifyInsert(int pos, char ch);
void notifyDelete(int from, int len);
}
package patterns.observer.copyright;
import javax.swing.JLabel;
@SuppressWarnings("serial")
public class TextListener extends JLabel implements Listener {
@Override
public void notifyDelete(int from, int len) {
System.out.println(String.format("notifyDelete(%d, %d)", from, len));
String h = getText().substring(0, from);
String t = getText().substring(from + len);
setText(h + t);
}
@Override
public void notifyInsert(int pos, char ch) {
System.out.println(String.format("notifyInsert(%d, %c)", pos, ch));
String h = getText().substring(0, pos);
String t = getText().substring(pos);
setText(h + ch + t);
}
}
package patterns.observer.copyright;
import java.util.ArrayList;
import java.util.List;
public class TextModel {
private final StringBuilder text = new StringBuilder();
private final List<Listener> listeners = new ArrayList<>();