/*
 * Javassist, a Java-bytecode translator toolkit.
 * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved.
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License.  Alternatively, the contents of this file may be used under
 * the terms of the GNU Lesser General Public License Version 2.1 or later,
 * or the Apache License Version 2.0.
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 */

package javassist;

import java.io.DataOutputStream;
import java.io.IOException;

import javassist.bytecode.ClassFile;

class CtNewClass extends CtClassType {
    /* true if the class is an interface.
     */
    protected boolean hasConstructor;

    CtNewClass(String name, ClassPool cp,
               boolean isInterface, CtClass superclass) {
        super(name, cp);
        wasChanged = true;
        String superName;
        if (isInterface || superclass == null)
            superName = null;
        else
            superName = superclass.getName();

        classfile = new ClassFile(isInterface, name, superName);
        if (isInterface && superclass != null)
            classfile.setInterfaces(new String[] { superclass.getName() });

        setModifiers(Modifier.setPublic(getModifiers()));
        hasConstructor = isInterface;
    }

    @Override
    protected void extendToString(StringBuffer buffer) {
        if (hasConstructor)
            buffer.append("hasConstructor ");

        super.extendToString(buffer);
    }

    @Override
    public void addConstructor(CtConstructor c)
        throws CannotCompileException
    {
        hasConstructor = true;
        super.addConstructor(c);
    }

    @Override
    public void toBytecode(DataOutputStream out)
        throws CannotCompileException, IOException
    {
        if (!hasConstructor)
            try {
                inheritAllConstructors();
                hasConstructor = true;
            }
            catch (NotFoundException e) {
                throw new CannotCompileException(e);
            }

        super.toBytecode(out);
    }

    
Adds constructors inhrited from the super class.
After this method is called, the class inherits all the
constructors from the super class.  The added constructor
calls the super's constructor with the same signature.
/**
     * Adds constructors inhrited from the super class.
     *
     * <p>After this method is called, the class inherits all the
     * constructors from the super class.  The added constructor
     * calls the super's constructor with the same signature.
     */
    public void inheritAllConstructors()
        throws CannotCompileException, NotFoundException
    {
        CtClass superclazz;
        CtConstructor[] cs;

        superclazz = getSuperclass();
        cs = superclazz.getDeclaredConstructors();

        int n = 0;
        for (int i = 0; i < cs.length; ++i) {
            CtConstructor c = cs[i];
            int mod = c.getModifiers();
            if (isInheritable(mod, superclazz)) {
                CtConstructor cons
                    = CtNewConstructor.make(c.getParameterTypes(),
                                            c.getExceptionTypes(), this);
                cons.setModifiers(mod & (Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE));
                addConstructor(cons);
                ++n;
            }
        }

        if (n < 1)
            throw new CannotCompileException(
                        "no inheritable constructor in " + superclazz.getName());

    }

    private boolean isInheritable(int mod, CtClass superclazz) {
        if (Modifier.isPrivate(mod))
            return false;

        if (Modifier.isPackage(mod)) {
            String pname = getPackageName();
            String pname2 = superclazz.getPackageName();
            if (pname == null)
                return pname2 == null;
            return pname.equals(pname2);
        }

        return true;
    }
}