+package org.argeo.api.gcr;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+import java.util.StringTokenizer;
+
+/** A name that can be expressed with various conventions. */
+public class CompositeString {
+ public final static Character UNDERSCORE = Character.valueOf('_');
+ public final static Character SPACE = Character.valueOf(' ');
+ public final static Character DASH = Character.valueOf('-');
+
+ private final String[] parts;
+
+ // optimisation
+ private final int hashCode;
+
+ public CompositeString(String str) {
+ Objects.requireNonNull(str, "String cannot be null");
+ if ("".equals(str.trim()))
+ throw new IllegalArgumentException("String cannot be empty");
+ if (!str.equals(str.trim()))
+ throw new IllegalArgumentException("String must be trimmed");
+ this.parts = toParts(str);
+ hashCode = hashCode(this.parts);
+ }
+
+ public String toString(char separator, boolean upperCase) {
+ StringBuilder sb = null;
+ for (String part : parts) {
+ if (sb == null) {
+ sb = new StringBuilder();
+ } else {
+ sb.append(separator);
+ }
+ sb.append(upperCase ? part.toUpperCase() : part);
+ }
+ return sb.toString();
+ }
+
+ public String toStringCaml(boolean firstCharUpperCase) {
+ StringBuilder sb = null;
+ for (String part : parts) {
+ if (sb == null) {// first
+ sb = new StringBuilder();
+ sb.append(firstCharUpperCase ? Character.toUpperCase(part.charAt(0)) : part.charAt(0));
+ } else {
+ sb.append(Character.toUpperCase(part.charAt(0)));
+ }
+
+ if (part.length() > 1)
+ sb.append(part.substring(1));
+ }
+ return sb.toString();
+ }
+
+ @Override
+ public int hashCode() {
+ return hashCode;
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (obj == null || !(obj instanceof CompositeString))
+ return false;
+
+ CompositeString other = (CompositeString) obj;
+ return Arrays.equals(parts, other.parts);
+ }
+
+ @Override
+ public String toString() {
+ return toString(DASH, false);
+ }
+
+ public static String[] toParts(String str) {
+ Character separator = null;
+ if (str.indexOf(UNDERSCORE) >= 0) {
+ checkNo(str, SPACE);
+ checkNo(str, DASH);
+ separator = UNDERSCORE;
+ } else if (str.indexOf(DASH) >= 0) {
+ checkNo(str, SPACE);
+ checkNo(str, UNDERSCORE);
+ separator = DASH;
+ } else if (str.indexOf(SPACE) >= 0) {
+ checkNo(str, DASH);
+ checkNo(str, UNDERSCORE);
+ separator = SPACE;
+ }
+
+ List<String> res = new ArrayList<>();
+ if (separator != null) {
+ StringTokenizer st = new StringTokenizer(str, separator.toString());
+ while (st.hasMoreTokens()) {
+ res.add(st.nextToken().toLowerCase());
+ }
+ } else {// CAML
+ StringBuilder current = null;
+ for (char c : str.toCharArray()) {
+ if (Character.isUpperCase(c)) {
+ if (current != null)
+ res.add(current.toString());
+ current = new StringBuilder();
+ }
+ if (current == null)// first char is lower case
+ current = new StringBuilder();
+ current.append(Character.toLowerCase(c));
+ }
+ res.add(current.toString());
+ }
+ return res.toArray(new String[res.size()]);
+ }
+
+ private static void checkNo(String str, Character c) {
+ if (str.indexOf(c) >= 0) {
+ throw new IllegalArgumentException("Only one kind of sperator is allowed");
+ }
+ }
+
+ private static int hashCode(String[] parts) {
+ int hashCode = 0;
+ for (String part : parts) {
+ hashCode = hashCode + part.hashCode();
+ }
+ return hashCode;
+ }
+
+ static boolean smokeTests() {
+ CompositeString camlName = new CompositeString("myComplexName");
+
+ assert new CompositeString("my-complex-name").equals(camlName);
+ assert new CompositeString("MY_COMPLEX_NAME").equals(camlName);
+ assert new CompositeString("My complex Name").equals(camlName);
+ assert new CompositeString("MyComplexName").equals(camlName);
+
+ assert "my-complex-name".equals(camlName.toString());
+ assert "MY_COMPLEX_NAME".equals(camlName.toString(UNDERSCORE, true));
+ assert "myComplexName".equals(camlName.toStringCaml(false));
+ assert "MyComplexName".equals(camlName.toStringCaml(true));
+
+ CompositeString plainName = new CompositeString("name");
+ assert "name".equals(plainName.toString());
+
+ return CompositeString.class.desiredAssertionStatus();
+ }
+
+// public static void main(String[] args) {
+// System.out.println(smokeTests());
+// }
+}