Introspector.java

/*
 * 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.rioproject.tools.ui.browser;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;

/**
 * Introspection related methods
 *
 * @version 0.2 06/04/98
 */

class Introspector {

    public static boolean isHidden(Field f) {
        int m = f.getModifiers();
        return Modifier.isPrivate(m) || Modifier.isStatic(m);

    }

    public static boolean isString(Class clazz) {
        return "java.lang.String".equals(clazz.getName());
    }

    public static boolean isWrapper(Class clazz) {
        String name = clazz.getName();

        return "java.lang.Integer".equals(name) ||
               "java.lang.Boolean".equals(name) ||
               "java.lang.Byte".equals(name) ||
               "java.lang.Char".equals(name) ||
               "java.lang.Double".equals(name) ||
               "java.lang.Float".equals(name) ||
               "java.lang.Long".equals(name);
    }

    /**
     * Return the name of an interface or primitive type, handling arrays.
     */
    public static String getTypename(Class t, boolean showPackage) {
        String brackets = "";
        while (t.isArray()) {
            brackets += "[]";
            t = t.getComponentType();
        }

        if (showPackage)
            return t.getName() + brackets;
        else
            return extractClassName(t.getName()) + brackets;
    }

    /**
     * Return a string version of modifiers, handling spaces nicely.
     */
    public static String getModifierString(int m) {
        if (m == 0)
            return "";
        else
            return Modifier.toString(m) + " ";
    }

    /**
     * Print the modifiers, type, and name of a field.
     */
    public static String getFieldString(Field f, boolean showModifier, boolean showPackage) {
        String fstring = "";

        if (showModifier)
            fstring += getModifierString(f.getModifiers());

        fstring += getTypename(f.getType(), showPackage);
        fstring += " ";
        fstring += f.getName();

        return fstring;
    }

    public static String extractClassName(String fullName) {
        int index = fullName.lastIndexOf(".");

        return fullName.substring(index + 1);
    }
}