/*
 * Copyright (c) 1998, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// Contributors:
//     Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.jaxb.javamodel.reflection;

import java.lang.reflect.GenericArrayType;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

import org.eclipse.persistence.jaxb.TypeMappingInfo;
import org.eclipse.persistence.jaxb.javamodel.JavaClass;
import org.eclipse.persistence.jaxb.javamodel.JavaModel;
import org.eclipse.persistence.jaxb.javamodel.JavaModelInput;

/**
 * INTERNAL:
 * <p><b>Purpose:</b>Provide access to an array of JavaClass instances
 * and their associated JavaModel.  This class will transform an array
 * of Class objects to an array of JavaClasses.
 *
 * <p><b>Responsibilities:</b>
 * <ul>
 * <li>Create an array of JavaClass instances from an array of Classes</li>
 * <li>Return an array of JavaClass objects to be used by the generator</li>
 * <li>Return the JavaModel to be used during generation</li>
 * </ul>
 *
 * @since Oracle TopLink 11.1.1.0.0
 * @see org.eclipse.persistence.jaxb.javamodel.JavaClass
 * @see org.eclipse.persistence.jaxb.javamodel.JavaModel
 * @see org.eclipse.persistence.jaxb.javamodel.JavaModelInput
 */
public class JavaModelInputImpl implements JavaModelInput {

    private JavaClass[] jClasses;
    private JavaModel jModel;
    private boolean facets;

    /**
     * This constructor builds an array of JavaClass objects from an array
     * of Types.  The JavaModel instance to be used is also set here.
     *
     * This constructor assumes that the a given type in the list will
     * either be a Class or ParameterizedType.
     *
     * @param types
     * @param javaModel
     */
    public JavaModelInputImpl(Type[] types, JavaModel javaModel) {
         jModel = javaModel;
         jClasses = new JavaClass[types.length];
         for (int i=0; i<types.length; i++) {
             TypeMappingInfo typeMappingInfo = new TypeMappingInfo();
             Type type = types[i];
             typeMappingInfo.setType(type);

             jClasses[i] = buildJavaClassImpl(type);
         }
    }

    public JavaModelInputImpl(TypeMappingInfo[] types, JavaModel javaModel) {
        jModel = javaModel;
        jClasses = new JavaClass[types.length];
        for (int i=0; i<types.length; i++) {
            TypeMappingInfo typeMappingInfo = types[i];
            Type type = typeMappingInfo.getType();

            jClasses[i] = buildJavaClassImpl(type);
        }
   }

    public JavaModelInputImpl(Class[] classes, JavaModel javaModel) {
        jModel = javaModel;
        jClasses = new JavaClass[classes.length];
        for (int i=0; i<classes.length; i++) {
            jClasses[i] = javaModel.getClass(classes[i]);
        }
    }

    private JavaClassImpl buildJavaClassImpl(Type type){
        // type should be a Class or ParameterizedType
        if (type instanceof Class) {
            return (JavaClassImpl) jModel.getClass((Class) type);
        } else if (type instanceof GenericArrayType) {
            Class genericTypeClass = (Class) ((GenericArrayType) type).getGenericComponentType();
            genericTypeClass = java.lang.reflect.Array.newInstance(genericTypeClass, 0).getClass();
            return new JavaClassImpl(genericTypeClass, (JavaModelImpl) jModel);
        } else {
            // assume parameterized type
            ParameterizedType pType = (ParameterizedType) type;
            return new JavaClassImpl(pType, (Class) pType.getRawType(), (JavaModelImpl) jModel);
        }
    }

    @Override
    public JavaClass[] getJavaClasses() {
        return jClasses;
    }

    @Override
    public JavaModel getJavaModel() {
        return jModel;
    }

    public boolean isFacets() {
        return facets;
    }

    public void setFacets(boolean facets) {
        this.facets = facets;
    }
}