/*
* Copyright (C) 2015 Red Hat, Inc. and/or its affiliates.
*
* 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
*
* http://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.
*/
package org.jboss.errai.common.rebind;
/**
* Utility methods for naming generated classes.
*
* @author Max Barkley <mbarkley@redhat.com>
*/
public class NameUtil {
/**
* @return The given fully qualified class name with underscores replacing
* character not allowed in identifiers.
*/
public static String derivedIdentifier(final String fullyQualifiedClassName) {
return fullyQualifiedClassName.replace('.', '_').replace('$', '_');
}
/**
* @param derivdedIdentifier A value returned from {@link #derivedIdentifier(String)}.
* @return The derivedIdentifier with package parts shortened to initials.
*/
public static String shortenDerivedIdentifier(final String derivdedIdentifier) {
return shortenDerivedIdentifier(derivdedIdentifier, "_");
}
private static String shortenDerivedIdentifier(final String derivedIdentifier, final String delimiter) {
final String[] parts = derivedIdentifier.split(delimiter);
final StringBuilder builder = new StringBuilder();
boolean haveSeenUpperCase = false;
for (final String part : parts) {
if (haveSeenUpperCase || Character.isUpperCase(part.charAt(0))) {
builder.append(part);
haveSeenUpperCase = true;
}
else {
builder.append(part.charAt(0));
}
builder.append('_');
}
builder.delete(builder.length() - 1, builder.length());
return builder.toString();
}
/**
* @return A compact String representation of the given object's hashCode, using only characters in the ranges
* 'A'-'Z', 'a'-'z', '0'-'9', '_', and '$'.
*/
public static String getShortHashString(final Object obj) {
return getShortHashString(obj.hashCode());
}
/**
* @return A compact String representation of the given hashCode, using only characters in the ranges
* 'A'-'Z', 'a'-'z', '0'-'9', '_', and '$'.
*/
public static String getShortHashString(final int hashCode) {
int remaining = hashCode;
final StringBuilder builder = new StringBuilder(6);
for (int i = 0; i < 6; i++) {
final int part = remaining & 0b111111;
builder.append(getHashChar(part));
remaining = (remaining >> 6);
}
return builder.toString();
}
static char getHashChar(int part) {
if (part <= 'Z' - 'A') {
return (char) ('A' + part);
}
else {
part -= 1 + ('Z' - 'A');
if (part <= 'z' - 'a') {
return (char) ('a' + part);
}
else {
part -= 1 + ('z' - 'a');
if (part <= '9' - '0') {
return (char) ('0' + part);
}
else {
part -= 1 + ('9' - '0');
if (part == 0) {
return '$';
}
else if (part == 1) {
return '_';
}
else {
throw new IllegalArgumentException("Argument [part] should satisfy [0 <= part < 64], but [part = " + part + "].");
}
}
}
}
}
}