Java Reflection Constructor Get getConstructorCalls(Class aClass)

Description

Gets an array of all Constructor calls for the given class

License

Apache License

Parameter

Parameter	Description
aClass	a parameter

Declaration

public static String[] getConstructorCalls(Class aClass) 

Method Source Code

//package com.java2s;
/*/*from  ww  w  .  j  a v  a  2  s .  com*/
 * Copyright 2008 Ayman Al-Sairafi ayman.alsairafi@gmail.com
 *
 * 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.
 */

import java.lang.reflect.Constructor;

import java.lang.reflect.Method;

public class Main {
    /**
     * Gets an array of all Constructor calls for the given class
     * @param aClass
     * @return
     */
    public static String[] getConstructorCalls(Class aClass) {
        Constructor[] constructors = aClass.getConstructors();
        String[] cons = new String[constructors.length];
        int i = 0;
        for (Constructor c : constructors) {
            cons[i++] = getJavaCallString(c);
        }
        return cons;
    }

    /**
     * Convert the constructor to a Java Code String
     * (arguments are replaced by the simple types)
     * @param c Constructor
     * @return
     */
    public static String getJavaCallString(Constructor c) {
        StringBuilder call = new StringBuilder();
        call.append(c.getDeclaringClass().getSimpleName());
        addParamsString(call, c.getParameterTypes());
        return call.toString();
    }

    /**
     * Convert the Method to a Java Code String
     * (arguments are replaced by the simple types)
     * @param method Method
     * @return
     */
    public static String getJavaCallString(Method method) {
        StringBuilder call = new StringBuilder();
        call.append(method.getName());
        addParamsString(call, method.getParameterTypes());
        return call.toString();
    }

    /**
     * Adds the class SimpleNames, comma sepearated and surrounded by paranthesis to the
     * call StringBuffer
     * @param call
     * @param params
     * @return
     */
    public static StringBuilder addParamsString(StringBuilder call, Class[] params) {
        call.append("(");
        boolean firstArg = true;
        for (Class arg : params) {
            if (firstArg) {
                firstArg = false;
            } else {
                call.append(", ");
            }
            call.append(arg.getSimpleName());
        }
        call.append(")");
        return call;
    }
}

Related

1. getConstructor(String cls_name, Class[] param_cls)
2. getConstructor(String string, Class... types)
3. getConstructor(String type, Class[] paramTypes)
4. getConstructor(String typeString)
5. getConstructorAccessor(Class enumClass, Class[] additionalParameterTypes)
6. getConstructorDescriptor(final Constructor c)
7. getConstructorForArguments( java.lang.reflect.Constructor[] constructors, Object... arguments)
8. getConstructorFromSignature(Class clazz, String cstrSig)
9. getConstructorIfAvailable(Class clazz, Class... paramTypes)