ParameterizedTypeImpl.java

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package com.sun.faces.cdi;

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

/**
 * <p class="changed_added_2_3">
 * ParameterizedTypeImpl is a basic implementation of the ParameterizedType
 * interface. It is used by the dynamic CDI producers that produce generic
 * types.
 * </p>
 *
 * @since 2.3
 */
public class ParameterizedTypeImpl implements ParameterizedType {

    /**
     * Stores the owner type.
     */
    private final Type ownerType;

    /**
     * Stores the raw type.
     */
    private final Class<?> rawType;

    /**
     * Stores the actual type arguments.
     */
    private final Type[] actualTypeArguments;

    /**
     * Constructs an instance of ParameterizedType without an owner type
     *
     * @param rawType Type representing the class or interface that declares
     * this type.
     * @param actualTypeArguments Array of Types representing the actual type
     * arguments for this type
     */
    public ParameterizedTypeImpl(Class<?> rawType, Type[] actualTypeArguments) {
        this(null, rawType, actualTypeArguments);
    }

    /**
     * Constructs an instance of ParameterizedType
     *
     * @param ownerType the Type representing the type that this type is
     * embedded in, if any. It can be null.
     * @param rawType the Type representing the class or interface that declares
     * this type.
     * @param actualTypeArguments Array of Types representing the actual type
     * arguments for this type
     */
    public ParameterizedTypeImpl(Type ownerType, Class<?> rawType,
            Type[] actualTypeArguments) {

        this.ownerType = ownerType;
        this.rawType = rawType;
        this.actualTypeArguments = actualTypeArguments;
    }

    /**
     * Get the owner type.
     *
     * @return the owner type.
     */
    @Override
    public Type getOwnerType() {
        return ownerType;
    }

    /**
     * Get the raw type.
     *
     * @return the raw type.
     */
    @Override
    public Type getRawType() {
        return rawType;
    }

    /**
     * Get the actual type arguments.
     *
     * @return the actual type arguments.
     */
    @Override
    public Type[] getActualTypeArguments() {
        return actualTypeArguments;
    }

    /**
     * Equals method.
     *
     * @param other the object to compare against.
     * @return true if it is equals, false otherwise.
     */
    @Override
    public boolean equals(Object other) {
        return other instanceof ParameterizedType
                ? equals((ParameterizedType) other) : false;
    }

    /**
     *
     * Tests if an other instance of ParameterizedType is "equal to" this
     * instance.
     *
     * @param other the other instance of ParameterizedType
     * @return true if instances equal, false otherwise.
     */
    public boolean equals(ParameterizedType other) {
        return this == other ? true
                : Objects.equals(getOwnerType(), other.getOwnerType())
                && Objects.equals(getRawType(), other.getRawType())
                && Arrays.equals(getActualTypeArguments(),
                        other.getActualTypeArguments());
    }

    /**
     * Hash code.
     *
     * @return the hash code.
     */
    @Override
    public int hashCode() {
        return Objects.hashCode(getOwnerType())
                ^ Objects.hashCode(getRawType())
                ^ Arrays.hashCode(getActualTypeArguments());
    }
}