/*
 *JBoss, Home of Professional Open Source
 *
 *Copyright 2013 Red Hat, Inc. and/or its affiliates.
 *
 *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.
 */

package org.picketlink.common.reflection;

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Arrays;


public class ParameterizedTypeImpl implements ParameterizedType {
    private final Type[] actualTypeArguments;
    private final Type rawType;
    private final Type ownerType;

    public ParameterizedTypeImpl(Type rawType, Type[] actualTypeArguments, Type ownerType) {
        this.actualTypeArguments = actualTypeArguments;
        this.rawType = rawType;
        this.ownerType = ownerType;
    }

    public Type[] getActualTypeArguments() {
        return Arrays.copyOf(actualTypeArguments, actualTypeArguments.length);
    }

    public Type getOwnerType() {
        return ownerType;
    }

    public Type getRawType() {
        return rawType;
    }

    @Override
    public int hashCode() {
        return Arrays.hashCode(actualTypeArguments) ^ (ownerType == null ? 0 :
                ownerType.hashCode()) ^ (rawType == null ? 0 : rawType.hashCode());
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        } else if (obj instanceof ParameterizedType) {
            ParameterizedType that = (ParameterizedType) obj;
            Type thatOwnerType = that.getOwnerType();
            Type thatRawType = that.getRawType();
            return (ownerType == null ? thatOwnerType == null :
                    ownerType.equals(thatOwnerType)) && (rawType == null ? thatRawType == null :
                    rawType.equals(thatRawType)) && Arrays.equals(actualTypeArguments, that.getActualTypeArguments());
        } else {
            return false;
        }

    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append(rawType);
        if (actualTypeArguments.length > 0) {
            sb.append("<");
            for (Type actualType : actualTypeArguments) {
                sb.append(actualType);
                sb.append(",");
            }
            sb.delete(sb.length() - 1, sb.length());
            sb.append(">");
        }
        return sb.toString();
    }
}