--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/java/sql-dk/src/main/java/info/globalcode/sql/dk/Functions.java Mon Mar 04 20:15:24 2019 +0100
@@ -0,0 +1,254 @@
+/**
+ * SQL-DK
+ * Copyright © 2013 František Kučera (frantovo.cz)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package info.globalcode.sql.dk;
+
+import info.globalcode.sql.dk.configuration.NameIdentified;
+import info.globalcode.sql.dk.configuration.PropertyDeclaration;
+import info.globalcode.sql.dk.configuration.PropertyDeclarations;
+import info.globalcode.sql.dk.formatting.Formatter;
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ *
+ * @author Ing. František Kučera (frantovo.cz)
+ */
+public class Functions {
+
+ private static final String NBSP = " ";
+ private static final Pattern WHITESPACE_TO_REPLACE = Pattern.compile("\\n|\\r|\\t|" + NBSP);
+
+ private Functions() {
+ }
+
+ public static boolean equalz(Object a, Object b) {
+ return a == null ? b == null : a.equals(b);
+ }
+
+ /**
+ *
+ * @param text String to be examinated
+ * @param trim whether text should be trimmed before examination
+ * @return whether text is not empty and one or more characters long (after prospective trim)
+ */
+ public static boolean isEmpty(String text, boolean trim) {
+ if (text == null) {
+ return true;
+ } else {
+ if (trim) {
+ text = text.trim();
+ }
+ return text.isEmpty();
+ }
+ }
+
+ /**
+ * @see #isEmpty(java.lang.String, boolean)
+ */
+ public static boolean isNotEmpty(String text, boolean trim) {
+ return !isEmpty(text, trim);
+ }
+
+ public boolean isEmpty(Collection c) {
+ return c == null || c.isEmpty();
+ }
+
+ public boolean isNotEmpty(Collection c) {
+ return !isEmpty(c);
+ }
+
+ public boolean isEmpty(Map m) {
+ return m == null || m.isEmpty();
+ }
+
+ public boolean isNotEmpty(Map m) {
+ return !isEmpty(m);
+ }
+
+ /**
+ * @return empty collection if given one is null | or the original one
+ */
+ public static <T> Collection<T> notNull(Collection<T> c) {
+ if (c == null) {
+ return Collections.emptyList();
+ } else {
+ return c;
+ }
+ }
+
+ public static <T extends NameIdentified> T findByName(Collection<T> collection, String name) {
+ for (T element : notNull(collection)) {
+ if (element != null && equalz(element.getName(), name)) {
+ return element;
+ }
+ }
+
+ return null;
+ }
+
+ /**
+ * Copy file from Java resources to file system.
+ */
+ public static void installResource(String resourceName, File target) throws IOException {
+ try (BufferedReader reader = new BufferedReader(new InputStreamReader(Functions.class.getClassLoader().getResourceAsStream(resourceName)))) {
+ try (PrintWriter writer = new PrintWriter(target)) {
+ while (true) {
+ String line = reader.readLine();
+ if (line == null) {
+ break;
+ } else {
+ writer.println(line);
+ }
+ }
+ }
+ }
+ }
+
+ public static String rpad(String s, int n) {
+ if (n > 0) {
+ return String.format("%1$-" + n + "s", s);
+ } else {
+ return s;
+ }
+ }
+
+ public static String lpad(String s, int n) {
+ if (n > 0) {
+ return String.format("%1$" + n + "s", s);
+ } else {
+ return s;
+ }
+ }
+
+ public static String repeat(char ch, int count) {
+ char[] array = new char[count];
+ Arrays.fill(array, ch);
+ return new String(array);
+ }
+ private final static char[] HEX_ALPHABET = "0123456789abcdef".toCharArray();
+
+ public static String toHex(byte[] bytes) {
+ char[] hexChars = new char[bytes.length * 2];
+ for (int j = 0; j < bytes.length; j++) {
+ int v = bytes[j] & 0xFF;
+ hexChars[j * 2] = HEX_ALPHABET[v >>> 4];
+ hexChars[j * 2 + 1] = HEX_ALPHABET[v & 0x0F];
+ }
+ return new String(hexChars);
+ }
+
+ public static String readString(InputStream in) throws IOException {
+ try (BufferedReader br = new BufferedReader(new InputStreamReader(in))) {
+ StringBuilder result = new StringBuilder();
+ for (String line = br.readLine(); line != null; line = br.readLine()) {
+ result.append(line);
+ result.append('\n');
+ }
+ return result.toString();
+ }
+ }
+
+ /**
+ * @param <P> type of the last parent
+ * @param <T> type of the examined class
+ * @param type examined class
+ * @param lastParent the last parent type to stop at
+ * @return list of types starting with <code>type</code> and ending with <code>lastParent</code>
+ */
+ public static <P, T extends P> List<Class<? extends P>> getClassHierarchy(Class<T> type, Class<P> lastParent) {
+ List<Class<? extends P>> hierarchy = new ArrayList<>();
+
+ for (Class current = type; current != null && lastParent.isAssignableFrom(current); current = current.getSuperclass()) {
+ hierarchy.add(current);
+ }
+
+ return hierarchy;
+ }
+
+ public static PropertyDeclaration[] getPropertyDeclarations(Class<? extends Formatter> formatterClass) {
+ PropertyDeclarations properties = formatterClass.getAnnotation(PropertyDeclarations.class);
+
+ if (properties == null) {
+ PropertyDeclaration p = formatterClass.getAnnotation(PropertyDeclaration.class);
+ return p == null ? new PropertyDeclaration[]{} : new PropertyDeclaration[]{p};
+ } else {
+ return properties.value();
+ }
+ }
+
+ /**
+ * TODO: support background or styles and move to ColorfulPrintWriter
+ *
+ * @param out
+ * @param valueString
+ * @param basicColor
+ * @param escapeColor
+ */
+ public static void printValueWithWhitespaceReplaced(ColorfulPrintWriter out, String valueString, ColorfulPrintWriter.TerminalColor basicColor, ColorfulPrintWriter.TerminalColor escapeColor) {
+
+ Matcher m = WHITESPACE_TO_REPLACE.matcher(valueString);
+
+ int start = 0;
+
+ while (m.find(start)) {
+
+ printColorOrNot(out, basicColor, valueString.substring(start, m.start()));
+
+ switch (m.group()) {
+ case "\n":
+ out.print(escapeColor, "↲");
+ break;
+ case "\r":
+ out.print(escapeColor, "⏎");
+ break;
+ case "\t":
+ out.print(escapeColor, "↹");
+ break;
+ case NBSP:
+ out.print(escapeColor, "⎵");
+ break;
+ default:
+ throw new IllegalStateException("Unexpected whitespace token: „" + m.group() + "“");
+ }
+
+ start = m.end();
+ }
+
+ printColorOrNot(out, basicColor, valueString.substring(start, valueString.length()));
+ }
+
+ private static void printColorOrNot(ColorfulPrintWriter out, ColorfulPrintWriter.TerminalColor color, String text) {
+ if (color == null) {
+ out.print(text);
+ } else {
+ out.print(color, text);
+ }
+ }
+}