Java ClassLoader toTypeArray(String[] s)

Description

Converts an array of Class names to Class types

License

Open Source License

Parameter

Parameter	Description
s	the array of class names.

Exception

Parameter	Description
ClassNotFoundException	an exception

Return

the array of classes.

Declaration

public static Class[] toTypeArray(String[] s) throws ClassNotFoundException 

Method Source Code

//package com.java2s;
/*//from   ww w. ja v  a2  s.  co m
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 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
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import java.lang.reflect.Array;

import java.util.Arrays;

public class Main {
    private static final String[] PRIMITIVE_NAMES = new String[] { "boolean", "byte", "char", "double", "float",
            "int", "long", "short", "void" };
    private static final Class[] PRIMITIVES = new Class[] { boolean.class, byte.class, char.class, double.class,
            float.class, int.class, long.class, short.class, Void.TYPE };

    /**
     * Converts an array of Class names to Class types
     * 
     * @param s the array of class names.
     * @return the array of classes.
     * @throws ClassNotFoundException
     */
    public static Class[] toTypeArray(String[] s) throws ClassNotFoundException {
        if (s == null)
            return null;
        Class[] c = new Class[s.length];
        for (int i = 0; i < s.length; i++) {
            c[i] = forName(s[i]);
        }
        return c;
    }

    public static Class forName(String name) throws ClassNotFoundException {
        if (null == name || "".equals(name)) {
            return null;
        }
        Class c = forNamePrimitive(name);
        if (c == null) {
            if (name.endsWith("[]")) {
                String nc = name.substring(0, name.length() - 2);
                c = Class.forName(nc, false, Thread.currentThread().getContextClassLoader());
                c = Array.newInstance(c, 0).getClass();
            } else {
                c = Class.forName(name, false, Thread.currentThread().getContextClassLoader());
            }
        }
        return c;
    }

    protected static Class forNamePrimitive(String name) {
        if (name.length() <= 8) {
            int p = Arrays.binarySearch(PRIMITIVE_NAMES, name);
            if (p >= 0) {
                return PRIMITIVES[p];
            }
        }
        return null;
    }
}

Related

1. readSampleJson(String name)
2. saveProperties(Properties properties, String name)
3. scanPackage(String path)
4. searchByAttributeKey(String key)
5. storePropertiesFile(String fileName, String filePath, String storeComment)