Android Open Source - wototoplayer Media Type

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License

The source code is released under:

Copyright (c) 2015, Chris Greenhalgh All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met...

Java Source Code

/*
 * Copyright (C) 2013 Square, Inc.//from   w w w .j  av  a2s  . c o m
 *
 * 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.squareup.okhttp;

import java.nio.charset.Charset;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * An <a href="http://tools.ietf.org/html/rfc2045">RFC 2045</a> Media Type,
 * appropriate to describe the content type of an HTTP request or response body.
 */
public final class MediaType {
  private static final String TOKEN = "([a-zA-Z0-9-!#$%&'*+.^_`{|}~]+)";
  private static final String QUOTED = "\"([^\"]*)\"";
  private static final Pattern TYPE_SUBTYPE = Pattern.compile(TOKEN + "/" + TOKEN);
  private static final Pattern PARAMETER = Pattern.compile(
      ";\\s*" + TOKEN + "=(?:" + TOKEN + "|" + QUOTED + ")");

  private final String mediaType;
  private final String type;
  private final String subtype;
  private final String charset;

  private MediaType(String mediaType, String type, String subtype, String charset) {
    this.mediaType = mediaType;
    this.type = type;
    this.subtype = subtype;
    this.charset = charset;
  }

  /**
   * Returns a media type for {@code string}, or null if {@code string} is not a
   * well-formed media type.
   */
  public static MediaType parse(String string) {
    Matcher typeSubtype = TYPE_SUBTYPE.matcher(string);
    if (!typeSubtype.lookingAt()) return null;
    String type = typeSubtype.group(1).toLowerCase(Locale.US);
    String subtype = typeSubtype.group(2).toLowerCase(Locale.US);

    String charset = null;
    Matcher parameter = PARAMETER.matcher(string);
    for (int s = typeSubtype.end(); s < string.length(); s = parameter.end()) {
      parameter.region(s, string.length());
      if (!parameter.lookingAt()) return null; // This is not a well-formed media type.

      String name = parameter.group(1);
      if (name == null || !name.equalsIgnoreCase("charset")) continue;
      if (charset != null) throw new IllegalArgumentException("Multiple charsets: " + string);
      charset = parameter.group(2) != null
          ? parameter.group(2)  // Value is a token.
          : parameter.group(3); // Value is a quoted string.
    }

    return new MediaType(string, type, subtype, charset);
  }

  /**
   * Returns the high-level media type, such as "text", "image", "audio",
   * "video", or "application".
   */
  public String type() {
    return type;
  }

  /**
   * Returns a specific media subtype, such as "plain" or "png", "mpeg",
   * "mp4" or "xml".
   */
  public String subtype() {
    return subtype;
  }

  /**
   * Returns the charset of this media type, or null if this media type doesn't
   * specify a charset.
   */
  public Charset charset() {
    return charset != null ? Charset.forName(charset) : null;
  }

  /**
   * Returns the charset of this media type, or {@code defaultValue} if this
   * media type doesn't specify a charset.
   */
  public Charset charset(Charset defaultValue) {
    return charset != null ? Charset.forName(charset) : defaultValue;
  }

  /**
   * Returns the encoded media type, like "text/plain; charset=utf-8",
   * appropriate for use in a Content-Type header.
   */
  @Override public String toString() {
    return mediaType;
  }

  @Override public boolean equals(Object o) {
    return o instanceof MediaType && ((MediaType) o).mediaType.equals(mediaType);
  }

  @Override public int hashCode() {
    return mediaType.hashCode();
  }
}

Java Source Code List

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