CacheBehaviour.cs

using UnityEngine;
using System;

namespace UnityToolbag
{
    /// <summary>
    /// A safe, drop-in replacement for MonoBehaviour as your base class. Each property value is cached
    /// and GetComponent will be called if the instance is null or is destroyed.
    /// </summary>
    public abstract class CacheBehaviour : MonoBehaviour
    {
        [HideInInspector, NonSerialized]
        private Animation _animation;

        /// <summary>
        /// Gets the Animation attached to the object.
        /// </summary>
        public new Animation animation { get { return _animation ? _animation : (_animation = GetComponent<Animation>()); } }

        [HideInInspector, NonSerialized]
        private AudioSource _audio;

        /// <summary>
        /// Gets the AudioSource attached to the object.
        /// </summary>
        public new AudioSource audio { get { return _audio ? _audio : (_audio = GetComponent<AudioSource>()); } }

        [HideInInspector, NonSerialized]
        private Camera _camera;

        /// <summary>
        /// Gets the Camera attached to the object.
        /// </summary>
        public new Camera camera { get { return _camera ? _camera : (_camera = GetComponent<Camera>()); } }

        [HideInInspector, NonSerialized]
        private Collider _collider;

        /// <summary>
        /// Gets the Collider attached to the object.
        /// </summary>
        public new Collider collider { get { return _collider ? _collider : (_collider = GetComponent<Collider>()); } }

        [HideInInspector, NonSerialized]
        private Collider2D _collider2D;

        /// <summary>
        /// Gets the Collider2D attached to the object.
        /// </summary>
        public new Collider2D collider2D { get { return _collider2D ? _collider2D : (_collider2D = GetComponent<Collider2D>()); } }

        [HideInInspector, NonSerialized]
        private ConstantForce _constantForce;

        /// <summary>
        /// Gets the ConstantForce attached to the object.
        /// </summary>
        public new ConstantForce constantForce { get { return _constantForce ? _constantForce : (_constantForce = GetComponent<ConstantForce>()); } }

        [HideInInspector, NonSerialized]
        private GUIText _guiText;

        /// <summary>
        /// Gets the GUIText attached to the object.
        /// </summary>
        public new GUIText guiText { get { return _guiText ? _guiText : (_guiText = GetComponent<GUIText>()); } }

        [HideInInspector, NonSerialized]
        private GUITexture _guiTexture;

        /// <summary>
        /// Gets the GUITexture attached to the object.
        /// </summary>
        public new GUITexture guiTexture { get { return _guiTexture ? _guiTexture : (_guiTexture = GetComponent<GUITexture>()); } }

        [HideInInspector, NonSerialized]
        private HingeJoint _hingeJoint;

        /// <summary>
        /// Gets the HingeJoint attached to the object.
        /// </summary>
        public new HingeJoint hingeJoint { get { return _hingeJoint ? _hingeJoint : (_hingeJoint = GetComponent<HingeJoint>()); } }

        [HideInInspector, NonSerialized]
        private Light _light;

        /// <summary>
        /// Gets the Light attached to the object.
        /// </summary>
        public new Light light { get { return _light ? _light : (_light = GetComponent<Light>()); } }

        [HideInInspector, NonSerialized]
        private NetworkView _networkView;

        /// <summary>
        /// Gets the NetworkView attached to the object.
        /// </summary>
        public new NetworkView networkView { get { return _networkView ? _networkView : (_networkView = GetComponent<NetworkView>()); } }

        [HideInInspector, NonSerialized]
        private ParticleSystem _particleSystem;

        /// <summary>
        /// Gets the ParticleSystem attached to the object.
        /// </summary>
        public new ParticleSystem particleSystem { get { return _particleSystem ? _particleSystem : (_particleSystem = GetComponent<ParticleSystem>()); } }

        [HideInInspector, NonSerialized]
        private Renderer _renderer;

        /// <summary>
        /// Gets the Renderer attached to the object.
        /// </summary>
        public new Renderer renderer { get { return _renderer ? _renderer : (_renderer = GetComponent<Renderer>()); } }

        [HideInInspector, NonSerialized]
        private Rigidbody _rigidbody;

        /// <summary>
        /// Gets the Rigidbody attached to the object.
        /// </summary>
        public new Rigidbody rigidbody { get { return _rigidbody ? _rigidbody : (_rigidbody = GetComponent<Rigidbody>()); } }

        [HideInInspector, NonSerialized]
        private Rigidbody2D _rigidbody2D;

        /// <summary>
        /// Gets the Rigidbody2D attached to the object.
        /// </summary>
        public new Rigidbody2D rigidbody2D { get { return _rigidbody2D ? _rigidbody2D : (_rigidbody2D = GetComponent<Rigidbody2D>()); } }
    }
}