ImageBase.java

/*******************************************************************************
 * Copyright 2011-2013 Sergey Tarasevich
 *
 * 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.hpw.myapp.widget.emoticonskeyboard.utils.imageloader;

import android.widget.ImageView;

import java.io.IOException;
import java.util.Locale;

public interface ImageBase {

	void displayImage(String imageUri, ImageView imageView) throws IOException;

	enum Scheme {
		HTTP("http"),
        HTTPS("https"),
        FILE("file"),
        CONTENT("content"),
        ASSETS("assets"),
        DRAWABLE("drawable"),
        UNKNOWN("");

		private String scheme;
		private String uriPrefix;

		Scheme(String scheme) {
			this.scheme = scheme;
			uriPrefix = scheme + "://";
		}

		public static Scheme ofUri(String uri) {
			if (uri != null) {
				for (Scheme s : values()) {
					if (s.belongsTo(uri)) {
						return s;
					}
				}
			}
			return UNKNOWN;
		}

		public String toUri(String path){
			return uriPrefix + path;
		}

		public String crop(String uri) {
			if (!belongsTo(uri)) {
				throw new IllegalArgumentException(String.format("URI [%1$s] doesn't have expected scheme [%2$s]", uri, scheme));
			}
			return uri.substring(uriPrefix.length());
		}

        protected boolean belongsTo(String uri) {
            return uri.toLowerCase(Locale.US).startsWith(uriPrefix);
        }

		public static String cropScheme(String uri) throws IllegalArgumentException {
			return ofUri(uri).crop(uri);
		}
	}
}