2 * Copyright (C) 2015 Roland Haeder
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 package org.mxchange.jcore;
19 import java.io.BufferedReader;
20 import java.io.FileInputStream;
21 import java.io.FileNotFoundException;
22 import java.io.IOException;
23 import java.io.InputStreamReader;
24 import java.io.PrintWriter;
25 import java.lang.reflect.Field;
26 import java.lang.reflect.InvocationTargetException;
27 import java.lang.reflect.Method;
28 import java.text.MessageFormat;
29 import java.util.Arrays;
30 import java.util.HashMap;
31 import java.util.Iterator;
33 import java.util.Properties;
34 import java.util.ResourceBundle;
35 import java.util.StringTokenizer;
36 import org.apache.logging.log4j.LogManager;
37 import org.apache.logging.log4j.Logger;
38 import org.mxchange.jcore.application.Application;
39 import org.mxchange.jcore.client.Client;
40 import org.mxchange.jcore.contact.Contact;
41 import org.mxchange.jcore.database.backend.DatabaseBackend;
42 import org.mxchange.jcore.database.frontend.DatabaseFrontend;
43 import org.mxchange.jcore.database.storage.Storeable;
44 import org.mxchange.jcore.manager.Manageable;
49 * @author Roland Haeder
51 public class BaseFrameworkSystem implements FrameworkInterface {
56 private static ResourceBundle bundle;
59 * Instance for own properties
61 private static final Properties properties = new Properties(System.getProperties());
66 private static FrameworkInterface selfInstance;
71 private final Logger LOG;
74 * Application instance
76 private Application application;
79 * Instance for database backend
81 private DatabaseBackend backend;
86 private Client client;
91 private Contact contact;
96 private Manageable manager;
99 * Name of used database table, handled over to backend
101 private String tableName;
104 * DatabaseFrontend instance
106 private DatabaseFrontend wrapper;
112 LOG = LogManager.getLogger(this);
116 * No instances can be created of this class
118 protected BaseFrameworkSystem () {
120 this.setSelfInstance();
124 * Getter for this application
126 * @return Instance from this application
128 public static final FrameworkInterface getInstance () {
134 * Application instance
136 * @return the application
139 public final Application getApplication () {
140 return this.application;
149 public final Logger getLogger () {
156 * @return the contactManager
159 public final Manageable getManager () {
164 * Getter for human-readable string from given key
166 * @param key Key to return
167 * @return Human-readable message
170 public final String getMessageStringFromKey (final String key) {
172 return this.getBundle().getString(key);
176 * Some "getter" for target class instance from given name.
178 * @param instance Instance to iterate on
179 * @param targetClass Class name to look for
180 * @return Class instance
182 @SuppressWarnings("unchecked")
183 private Class<? extends FrameworkInterface> getClassFromTarget (final FrameworkInterface instance, final String targetClass) {
185 this.getLogger().debug(MessageFormat.format("instance={0},targetClass={1}", instance, targetClass)); //NOI18N
187 // Instance reflaction of this class
188 Class<? extends FrameworkInterface> c = instance.getClass();
191 while (!targetClass.equals(c.getSimpleName())) {
193 this.getLogger().debug(MessageFormat.format("c={0}", c.getSimpleName())); //NOI18N
195 // Get super class (causes unchecked warning)
196 c = (Class<? extends FrameworkInterface>) c.getSuperclass();
200 this.getLogger().trace(MessageFormat.format("c={0} - EXIT!", c)); //NOI18N
207 * Some "getter" for a Method instance from given method name
209 * @param instance Actual instance to call
210 * @param targetClass Target class name
211 * @param methodName Method name
212 * @return A Method instance
214 private Method getMethodFromName (final FrameworkInterface instance, final String targetClass, final String methodName) throws NoSuchMethodException {
216 this.getLogger().trace(MessageFormat.format("targetClass={0},methodName={1}", targetClass, methodName)); //NOI18N
218 // Get target class instance
219 Class<? extends FrameworkInterface> c = this.getClassFromTarget(instance, targetClass);
221 // Init field instance
222 Method method = null;
224 // Use reflection to get all attributes
225 method = c.getDeclaredMethod(methodName, new Class<?>[0]);
228 assert (method instanceof Method) : "method is not a Method instance"; //NOI18N
231 this.getLogger().trace(MessageFormat.format("method={0} - EXIT!", method)); //NOI18N
238 * Setter for self instance
240 private void setSelfInstance () {
241 // Need to set it here
246 * Aborts program with given exception
248 * @param throwable Any type of Throwable
250 protected final void abortProgramWithException (final Throwable throwable) {
252 this.getLogger().catching(throwable);
259 * Application instance
261 * @param application the application to set
263 protected final void setApplication (final Application application) {
264 this.application = application;
273 public final Client getClient () {
278 * Getter for bundle instance
280 * @return Resource bundle
282 protected final ResourceBundle getBundle () {
283 return BaseFrameworkSystem.bundle;
289 * @param client the client to set
291 protected final void setClient (final Client client) {
292 this.client = client;
296 * Name of used database table, handled over to backend
298 * @return the tableName
300 public final String getTableName () {
301 return this.tableName;
305 * Checks if given boolean field is available and set to same value
307 * @param columnName Column name to check
308 * @param bool Boolean value
309 * @return Whether all conditions are met
310 * @throws NoSuchMethodException May be thrown by some implementations
311 * @throws java.lang.IllegalAccessException If the method cannot be accessed
312 * @throws java.lang.reflect.InvocationTargetException Any other problems?
315 public boolean isFieldValueEqual (final String columnName, final boolean bool) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
317 throw new UnsupportedOperationException(MessageFormat.format("Not implemented. columnName={0},bool={1}", columnName, bool)); //NOI18N
323 * @param exception Exception to log
326 public final void logException (final Throwable exception) {
327 // Log this exception
328 this.getLogger().catching(exception);
332 * Initializes properties with default values
334 private void initPropertiesWithDefault () {
336 this.getLogger().trace("CALLED!"); //NOI18N
338 // Init default values:
339 // Default database backend
340 BaseFrameworkSystem.properties.put("org.mxchange.database.backend.class", "org.mxchange.jcore.database.backend.base64.Base64CsvDatabaseBackend"); //NOI18N
341 BaseFrameworkSystem.properties.put("database.backend.storagepath", "data/"); //NOI18N
344 BaseFrameworkSystem.properties.put("org.mxchange.database.mysql.host", "localhost"); //NOI18N
345 BaseFrameworkSystem.properties.put("org.mxchange.database.mysql.dbname", "test"); //NOI18N
346 BaseFrameworkSystem.properties.put("org.mxchange.database.mysql.login", ""); //NOI18N
347 BaseFrameworkSystem.properties.put("org.mxchange.database.mysql.password", ""); //NOI18N
350 this.getLogger().trace("EXIT!"); //NOI18N
354 * Writes the properties file to disk
356 private void writePropertiesFile () throws IOException {
358 this.getLogger().trace("CALLED!"); //NOI18N
361 BaseFrameworkSystem.properties.store(new PrintWriter(FrameworkInterface.PROPERTIES_CONFIG_FILE), "This file is automatically generated. You may wish to alter it."); //NOI18N
364 this.getLogger().trace("EXIT!"); //NOI18N
368 * Converts a column name like "foo_bar" to an attribute name like "fooBar"
370 * @param columnName Column name to convert
371 * @return Attribute name
373 protected String convertColumnNameToAttribute (final String columnName) {
375 this.getLogger().trace(MessageFormat.format("columnName={0} - CALLED!", columnName)); //NOI18N
377 // First all lower case
378 String lower = columnName.toLowerCase();
381 StringTokenizer tokenizer = new StringTokenizer(lower, "_"); //NOI18N
384 StringBuilder builder = new StringBuilder(tokenizer.countTokens());
390 while (tokenizer.hasMoreTokens()) {
392 String token = tokenizer.nextToken();
394 // Is later than first element?
396 // Make first character upper-case
397 char c = token.charAt(0);
398 token = String.valueOf(c).toUpperCase() + token.substring(1);
402 builder.append(token);
409 this.getLogger().trace(MessageFormat.format("builder={0} - EXIT!", builder)); //NOI18N
412 return builder.toString();
416 * Converts a column name like "foo_bar" to a method name like "getFooBar"
417 * for non-booleans and to "isFooBar" for boolean fields.
419 * @param columnName Column name to convert
420 * @param isBool Whether the parameter is boolean
421 * @return Attribute name
423 protected String convertColumnNameToGetterMethod (final String columnName, boolean isBool) {
425 this.getLogger().trace(MessageFormat.format("columnName={0} - CALLED!", columnName)); //NOI18N
428 StringTokenizer tokenizer = new StringTokenizer(columnName, "_"); //NOI18N
431 StringBuilder builder = new StringBuilder(tokenizer.countTokens());
436 builder.append("is"); //NOI18N
439 builder.append("get"); //NOI18N
443 while (tokenizer.hasMoreTokens()) {
445 String token = tokenizer.nextToken();
448 this.getLogger().debug(MessageFormat.format("token={0}", token)); //NOI18N
450 // Make it upper-case
451 char c = token.charAt(0);
452 token = String.valueOf(c).toUpperCase() + token.substring(1);
455 builder.append(token);
459 this.getLogger().trace(MessageFormat.format("builder={0} - EXIT!", builder)); //NOI18N
462 return builder.toString();
466 * Some "getter" for an array from given string and tokenizer
468 * @param str String to tokenize and get array from
469 * @param delimiter Delimiter
470 * @param size Size of array
471 * @return Array from tokenized string
472 * @todo Get rid of size parameter
474 protected String[] getArrayFromString (final String str, final String delimiter, final int size) {
476 this.getLogger().trace(MessageFormat.format("str={0},delimiter={1},size={2} - CALLED!", str, delimiter, size)); //NOI18N
479 StringTokenizer tokenizer = new StringTokenizer(str, delimiter);
481 // Init array and index
482 String[] tokens = new String[size];
485 // Run through all tokens
486 while (tokenizer.hasMoreTokens()) {
487 // Get current token and add it
488 tokens[index] = tokenizer.nextToken();
491 this.getLogger().debug(MessageFormat.format("Token at index{0}: {1}", index, tokens[1])); //NOI18N
498 this.getLogger().trace(MessageFormat.format("tokens({0})={1} - EXIT!", tokens.length, Arrays.toString(tokens))); //NOI18N
505 * Returns boolean field value from given method name by invoking it
507 * @param instance The instance to call
508 * @param targetClass Target class to look in
509 * @param methodName Method name to look for
510 * @return Boolean value from field
511 * @throws java.lang.NoSuchMethodException If the method was not found
512 * @throws java.lang.IllegalAccessException If the method cannot be accessed
513 * @throws java.lang.reflect.InvocationTargetException Some other problems?
515 protected boolean getBooleanField (final FrameworkInterface instance, final String targetClass, final String methodName) throws NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
517 this.getLogger().trace(MessageFormat.format("targetClass={0},methodName={1}", targetClass, methodName)); //NOI18N
519 // Get method instance
520 Method method = this.getMethodFromName(instance, targetClass, methodName);
522 // Get value from field
523 Boolean value = false;
525 // Try to get the value by invoking the method
526 value = (Boolean) method.invoke(instance);
535 * @param manager the manager instance to set
537 protected final void setContactManager (final Manageable manager) {
538 this.manager = manager;
542 * Returns any field value from given method name by invoking it
544 * @param instance The instance to call
545 * @param targetClass Target class to look in
546 * @param methodName Method name to look for
547 * @return Any value from field
548 * @throws java.lang.NoSuchMethodException If the method was not found
549 * @throws java.lang.IllegalAccessException If the method cannot be accessed
550 * @throws java.lang.reflect.InvocationTargetException Some other problems?
552 protected Object getField (final FrameworkInterface instance, final String targetClass, final String methodName) throws NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
554 this.getLogger().trace(MessageFormat.format("targetClass={0},methodName={1}", targetClass, methodName)); //NOI18N
556 // Get method to call
557 Method method = this.getMethodFromName(instance, targetClass, methodName);
559 // Get value from field
560 Object object = method.invoke(instance);
567 * Getter for property which must exist
569 * @param key Key to get
570 * @return Propety value
572 protected final String getProperty (final String key) {
573 return BaseFrameworkSystem.properties.getProperty(String.format("org.mxchange.%s", key)); //NOI18N
577 * Name of used database table, handled over to backend
579 * @param tableName the tableName to set
581 protected final void setTableName (final String tableName) {
582 this.tableName = tableName;
586 * Converts null to empty string or leaves original string.
588 * @param str Any string
589 * @return Empty string if null or original string
591 protected Object convertNullToEmpty (final Object str) {
593 this.getLogger().trace(MessageFormat.format("str={0}", str)); //NOI18N
597 // Return empty string
602 this.getLogger().trace(MessageFormat.format("str={0} - EXIT!", str)); //NOI18N
609 * Creates an iterator from given instance and class name.
611 * @param instance Instance to run getter calls on
612 * @param className Class name to iterate over
613 * @return An iterator over all object's fields
614 * @throws java.lang.NoSuchMethodException If the called method does not exist
615 * @throws java.lang.IllegalAccessException If the method cannot be accessed
616 * @throws java.lang.reflect.InvocationTargetException Any other problems?
618 protected Iterator<Map.Entry<Field, Object>> fieldIterator (final Storeable instance, final String className) throws IllegalArgumentException, NoSuchMethodException, IllegalAccessException, InvocationTargetException {
620 this.getLogger().trace(MessageFormat.format("instance={0},className={1} - CALLED!", instance, className)); //NOI18N
622 // Get all attributes from given instance
623 Field[] fields = this.getClassFromTarget(instance, className).getDeclaredFields();
626 this.getLogger().debug(MessageFormat.format("Found {0} fields.", fields.length)); //NOI18N
628 // A simple map with K=fieldName and V=Value is fine
629 Map<Field, Object> map = new HashMap<>(fields.length);
632 for (final Field field : fields) {
634 this.getLogger().debug(MessageFormat.format("field={0}", field.getName())); //NOI18N
636 // Does the field start with "$"?
637 if (field.getName().startsWith("$")) { //NOI18N
639 this.getLogger().debug(MessageFormat.format("Skipping field={0} as it starts with a dollar character.", field.getName())); //NOI18N
646 this.getLogger().debug(MessageFormat.format("Calling getValueFromColumn({0}) on instance {1} ...", field.getName(), instance)); //NOI18N
649 Object value = instance.getValueFromColumn(field.getName());
652 this.getLogger().debug(MessageFormat.format("Adding field={0},value={1}", field.getName(), value)); //NOI18N
655 map.put(field, value);
659 this.getLogger().debug(MessageFormat.format("Returning iterator for {0} entries ...", map.size())); //NOI18N
661 // Return list iterator
662 return map.entrySet().iterator();
666 * Instance for database backend
668 * @return the backend
670 protected final DatabaseBackend getBackend () {
675 * Instance for database backend
677 * @param backend the backend to set
679 protected final void setBackend (final DatabaseBackend backend) {
680 this.backend = backend;
684 * Getter for Contact instance
686 * @return Contact instance
688 protected final Contact getContact () {
693 * Setter for Contact instance
695 * @param contact A Contact instance
697 protected final void setContact (final Contact contact) {
698 this.contact = contact;
702 * Getter for DatabaseFrontend instance
704 * @return DatabaseFrontend instance
706 protected final DatabaseFrontend getFrontend () {
711 * Setter for wrapper instance
713 * @param wrapper A DatabaseFrontend instance
715 protected final void setFrontend (final DatabaseFrontend wrapper) {
716 this.wrapper = wrapper;
720 * Initializes i18n bundles
722 protected void initBundle () {
724 this.getLogger().trace("CALLED!");
726 // Is the bundle set?
727 if (bundle instanceof ResourceBundle) {
729 throw new IllegalStateException("called twice"); //NOI18N
733 bundle = ResourceBundle.getBundle(FrameworkInterface.I18N_BUNDLE_FILE); // NOI18N
736 this.getLogger().trace("EXIT!");
740 * Prepares all properties, the file is written if it is not found
742 * @throws java.io.IOException If any IO problem occurs
744 protected void initProperties () throws IOException {
746 this.getLogger().trace("CALLED!"); //NOI18N
749 this.getLogger().debug(MessageFormat.format("{0} properties are loaded already.", BaseFrameworkSystem.properties.size())); //NOI18N
751 // Are some properties loaded?
752 if (!BaseFrameworkSystem.properties.isEmpty()) {
753 // Some are already loaded, abort here
759 BaseFrameworkSystem.properties.load(new BufferedReader(new InputStreamReader(new FileInputStream(FrameworkInterface.PROPERTIES_CONFIG_FILE))));
762 this.getLogger().debug(MessageFormat.format("{0} properties has been loaded.", BaseFrameworkSystem.properties.size())); //NOI18N
763 } catch (final FileNotFoundException ex) {
765 this.getLogger().debug(MessageFormat.format("Properties file {0} not found: {1}", FrameworkInterface.PROPERTIES_CONFIG_FILE, ex)); //NOI18N
768 * The file is not found which is normal for first run, so
769 * initialize default values.
771 this.initPropertiesWithDefault();
774 this.writePropertiesFile();
778 this.getLogger().trace("EXIT!"); //NOI18N
782 * Checks whether the given field is a boolean field by probing it.
784 * @param instance Instance to call
785 * @param targetClass Target class
786 * @param columnName Column name to check
787 * @return Whether the given column name represents a boolean field
789 protected boolean isBooleanField (final FrameworkInterface instance, final String targetClass, final String columnName) {
791 this.getLogger().trace(MessageFormat.format("instance={0},targetCLass={1},columnName={2} - CALLED!", instance, targetClass, columnName)); //NOI18N
793 // Convert column name to getter name (boolean)
794 String methodName = this.convertColumnNameToGetterMethod(columnName, true);
796 // Get class instance
797 Class<? extends FrameworkInterface> c = this.getClassFromTarget(instance, targetClass);
799 // Defauzlt is boolean
800 boolean isBool = true;
803 // Now try to instance the method
804 Method method = c.getDeclaredMethod(methodName, new Class<?>[0]);
805 } catch (final NoSuchMethodException ex) {
807 this.getLogger().debug(MessageFormat.format("Method {0} does not exist, field {1} cannot be boolean: {2}", methodName, columnName, ex)); //NOI18N
814 this.getLogger().trace(MessageFormat.format("isBool={0} - EXIT!", isBool)); //NOI18N
821 * Sets value in properties instance.
823 * @param key Property key (part) to set
824 * @param value Property value to set
826 protected void setProperty (final String key, final String value) {
828 this.getLogger().trace(MessageFormat.format("key={0},value={1} - CALLED!", key, value)); //NOI18N
830 // Both should not be null
833 throw new NullPointerException("key is null");
834 } else if (value == null) {
836 throw new NullPointerException("value is null");
840 properties.setProperty(String.format("org.mxchange.%s", key), value); //NOI18N
843 this.getLogger().trace("EXIT!"); //NOI18N
847 * Some getter for properties names (without org.mxchange)
849 * @return An array with property names
851 protected String[] getPropertyNames () {
854 "database.backend.class", //NOI18N
855 "database.backend.storagepath", //NOI18N
856 "database.mysql.login", //NOI18N
857 "database.mysql.host", //NOI18N
858 "database.mysql.password", //NOI18N
859 "database.mysql.dbname", //NOI18N