/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.apache.myfaces.tobago.apt.generate;
  
  import java.util.HashMap;
  import java.util.Map;
  
  public class ClassUtils {
  
    private static final Map<String, Class> PRIMITIVE_MAP;
  
    static {
      PRIMITIVE_MAP = new HashMap<>(8);
      PRIMITIVE_MAP.put("boolean", Boolean.class);
      PRIMITIVE_MAP.put("byte", Byte.class);
      PRIMITIVE_MAP.put("char", Character.class);
      PRIMITIVE_MAP.put("short", Short.class);
      PRIMITIVE_MAP.put("int", Integer.class);
      PRIMITIVE_MAP.put("long", Long.class);
      PRIMITIVE_MAP.put("float", Float.class);
      PRIMITIVE_MAP.put("double", Double.class);
    }
  
    private ClassUtils() {
    }
  
    public static String getPackageName(final String qualifiedName) {
      final int pos = qualifiedName.lastIndexOf('.');
      if (pos != -1) {
        return qualifiedName.substring(0, pos);
      }
      return null;
    }
  
    public static String getSimpleName(final String qualifiedName) {
      final int pos = qualifiedName.lastIndexOf('.');
      if (pos != -1) {
        return qualifiedName.substring(pos + 1);
      }
      return null;
    }
  
    public static String getSmallSimpleName(final String qualifiedName) {
      final String simpleName = getSimpleName(qualifiedName);
      if (simpleName != null && simpleName.length() > 2) {
        return simpleName.substring(2, 3).toLowerCase() + simpleName.substring(3);
      } else {
        return simpleName;
      }
    }
  
    public static boolean isSystemClass(final String qualifiedClassName) {
      return qualifiedClassName.startsWith("java.lang.");
    }
  
    public static boolean isPrimitive(final String name) {
      return PRIMITIVE_MAP.containsKey(name);
    }
  
    public static Class getWrapper(final String primitive) {
      return PRIMITIVE_MAP.get(primitive);
    }
  }