/**
 *
 * Copyright (c) 2006-2017, Speedment, Inc. All Rights Reserved.
 *
 * 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 com.speedment.common.codegen.constant;

import com.speedment.common.codegen.model.ClassOrInterface;
import com.speedment.common.codegen.model.File;

import java.lang.reflect.Type;
import java.util.Objects;

import static java.util.Objects.requireNonNull;

/**
 * A very simple implementation of the java {@link Type} interface.
 * 
 * @author  Emil Forslund
 * @since   2.4.1
 */
public final class SimpleType implements Type {
    
    /**
     * Creates a new {@code SimpleType} with the specified absolute class name.
     * 
     * @param typeName  the absolute type name
     * @return          the created simple type
     */
    public static SimpleType create(String typeName) {
        return new SimpleType(typeName);
    }
    
    /**
     * Creates a new {@code SimpleType} referencing the specified class in the
     * specified file. These do not have to exist yet.
     * 
     * @param file   the file to reference
     * @param clazz  the class to reference
     * @return       the new simple type
     */
    public static SimpleType create(File file, ClassOrInterface<?> clazz) {
        return create(SimpleTypeUtil.nameOf(file, clazz));
    }

    @Override
    public String getTypeName() {
        return typeName;
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(this.typeName);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) { return true; }
        else if (obj == null) { return false; }
        else if (!(obj instanceof Type)) { return false; }
        
        final Type other = (Type) obj;
        return Objects.equals(typeName, other.getTypeName());
    }
    
    @Override
    public String toString() {
        return getTypeName();
    }
    
    private SimpleType(String typeName) {
        this.typeName = requireNonNull(typeName);
    }
    
    private final String typeName;
}