[Cronet] Create Builders, rename UrlRequestContext to CronetEngine

components/cronet/android/java/src/org/chromium/net/UrlRequestContextConfig.java

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.net;
 
-import org.json.JSONArray;
 import org.json.JSONException;
-import org.json.JSONObject;
-
-import java.io.File;
 
 /**
- * A config for UrlRequestContext, which allows runtime configuration of
- * UrlRequestContext.
+ * A config for CronetEngine, which allows runtime configuration of
+ * CronetEngine.
+ * @deprecated use {@link CronetEngine.Builder} instead.
  */
-public class UrlRequestContextConfig {
-    private final JSONObject mConfig;
-
-    /**
-     * Default config enables SPDY, disables QUIC, SDCH and http cache.
-     */
+public class UrlRequestContextConfig extends CronetEngine.Builder {
     public UrlRequestContextConfig() {
-        mConfig = new JSONObject();
-        enableLegacyMode(false);
-        enableQUIC(false);
-        enableHTTP2(true);
-        enableSDCH(false);
-        enableHttpCache(HTTP_CACHE_DISABLED, 0);
+        // Context will be passed in later when the ChromiumUrlRequestFactory
+        // or ChromiumUrlRequestContext is created.
+        super(null);
     }
 
-    /**
-     * Creates a config from a JSON string, which was serialized using
-     * {@link #toString}.
-     */
     public UrlRequestContextConfig(String json) throws JSONException {
-        mConfig = new JSONObject(json);
-    }
-
-    /**
-     * Overrides the user-agent header for all requests.
-     * @return the config to facilitate chaining.
-     */
-    public UrlRequestContextConfig setUserAgent(String userAgent) {
-        return putString(UrlRequestContextConfigList.USER_AGENT, userAgent);
-    }
-
-    String userAgent() {
-        return mConfig.optString(UrlRequestContextConfigList.USER_AGENT);
-    }
-
-    /**
-     * Sets directory for HTTP Cache and Cookie Storage. The directory must
-     * exist.
-     * @param value path to existing directory.
-     * @return the config to facilitate chaining.
-     */
-    public UrlRequestContextConfig setStoragePath(String value) {
-        if (!new File(value).isDirectory()) {
-            throw new IllegalArgumentException(
-                    "Storage path must be set to existing directory");
-        }
-
-        return putString(UrlRequestContextConfigList.STORAGE_PATH, value);
-    }
-
-    String storagePath() {
-        return mConfig.optString(UrlRequestContextConfigList.STORAGE_PATH);
-    }
-
-    /**
-     * Sets whether falling back to implementation based on system's
-     * {@link java.net.HttpURLConnection} implementation is enabled.
-     * Defaults to disabled.
-     * @return the config to facilitate chaining.
-     * @deprecated Not supported by the new API.
-     */
-    @Deprecated
-    public UrlRequestContextConfig enableLegacyMode(boolean value) {
-        return putBoolean(UrlRequestContextConfigList.ENABLE_LEGACY_MODE,
-                          value);
-    }
-
-    boolean legacyMode() {
-        return mConfig.optBoolean(
-                UrlRequestContextConfigList.ENABLE_LEGACY_MODE);
-    }
-
-    /**
-     * Overrides the name of the native library backing Cronet.
-     * @return the config to facilitate chaining.
-     */
-    UrlRequestContextConfig setLibraryName(String libName) {
-        return putString(UrlRequestContextConfigList.NATIVE_LIBRARY_NAME,
-                         libName);
-    }
-
-    String libraryName() {
-        return mConfig.optString(
-                UrlRequestContextConfigList.NATIVE_LIBRARY_NAME, "cronet");
-    }
-
-    /**
-     * Sets whether <a href="https://www.chromium.org/quic">QUIC</a> protocol
-     * is enabled. Defaults to disabled.
-     * @return the config to facilitate chaining.
-     */
-    public UrlRequestContextConfig enableQUIC(boolean value) {
-        return putBoolean(UrlRequestContextConfigList.ENABLE_QUIC, value);
-    }
-
-    /**
-     * Sets whether <a href="https://tools.ietf.org/html/rfc7540">HTTP/2</a>
-     * protocol is enabled. Defaults to enabled.
-     * @return the config to facilitate chaining.
-     */
-    public UrlRequestContextConfig enableHTTP2(boolean value) {
-        return putBoolean(UrlRequestContextConfigList.ENABLE_SPDY, value);
-    }
-
-    /**
-     * Sets whether
-     * <a
-     * href="https://lists.w3.org/Archives/Public/ietf-http-wg/2008JulSep/att-0441/Shared_Dictionary_Compression_over_HTTP.pdf">
-     * SDCH</a> compression is enabled. Defaults to disabled.
-     * @return the config to facilitate chaining.
-     */
-    public UrlRequestContextConfig enableSDCH(boolean value) {
-        return putBoolean(UrlRequestContextConfigList.ENABLE_SDCH, value);
-    }
-
-    /**
-     * Enables
-     * <a href="https://developer.chrome.com/multidevice/data-compression">Data
-     * Reduction Proxy</a>. Defaults to disabled.
-     * @param key key to use when authenticating with the proxy.
-     * @return the config to facilitate chaining.
-     */
-    public UrlRequestContextConfig enableDataReductionProxy(String key) {
-        return (putString(
-                UrlRequestContextConfigList.DATA_REDUCTION_PROXY_KEY, key));
-    }
-
-    /**
-     * Overrides
-     * <a href="https://developer.chrome.com/multidevice/data-compression">
-     * Data Reduction Proxy</a> configuration parameters with a primary
-     * proxy name, fallback proxy name, and a secure proxy check URL. Proxies
-     * are specified as [scheme://]host[:port]. Used for testing.
-     * @param primaryProxy the primary data reduction proxy to use.
-     * @param fallbackProxy a fallback data reduction proxy to use.
-     * @param secureProxyCheckUrl a URL to fetch to determine if using a secure
-     * proxy is allowed.
-     * @return the config to facilitate chaining.
-     * @hide
-     */
-    public UrlRequestContextConfig setDataReductionProxyOptions(
-            String primaryProxy,
-            String fallbackProxy,
-            String secureProxyCheckUrl) {
-        if (primaryProxy.isEmpty() || fallbackProxy.isEmpty()
-                || secureProxyCheckUrl.isEmpty()) {
-            throw new IllegalArgumentException(
-                    "Primary and fallback proxies and check url must be set");
-        }
-        putString(UrlRequestContextConfigList.DATA_REDUCTION_PRIMARY_PROXY,
-                primaryProxy);
-        putString(UrlRequestContextConfigList.DATA_REDUCTION_FALLBACK_PROXY,
-                fallbackProxy);
-        putString(UrlRequestContextConfigList
-                .DATA_REDUCTION_SECURE_PROXY_CHECK_URL, secureProxyCheckUrl);
-        return this;
-    }
-
-    /**
-     * Setting to disable HTTP cache. Some data may still be temporarily stored in memory.
-     * Passed to {@link #enableHttpCache}.
-     */
-    public static final int HTTP_CACHE_DISABLED = 0;
-
-    /**
-     * Setting to enable in-memory HTTP cache, including HTTP data.
-     * Passed to {@link #enableHttpCache}.
-     */
-    public static final int HTTP_CACHE_IN_MEMORY = 1;
-
-    /**
-     * Setting to enable on-disk cache, excluding HTTP data.
-     * {@link #setStoragePath} must be called prior to passing this constant to
-     * {@link #enableHttpCache}.
-     */
-    public static final int HTTP_CACHE_DISK_NO_HTTP = 2;
-
-    /**
-     * Setting to enable on-disk cache, including HTTP data.
-     * {@link #setStoragePath} must be called prior to passing this constant to
-     * {@link #enableHttpCache}.
-     */
-    public static final int HTTP_CACHE_DISK = 3;
-
-    /**
-     * Enables or disables caching of HTTP data and other information like QUIC
-     * server information.
-     * @param cacheMode control location and type of cached data.
-     * @param maxSize maximum size used to cache data (advisory and maybe
-     * exceeded at times).
-     * @return the config to facilitate chaining.
-     */
-    public UrlRequestContextConfig enableHttpCache(int cacheMode, long maxSize) {
-        if (cacheMode == HTTP_CACHE_DISK || cacheMode == HTTP_CACHE_DISK_NO_HTTP) {
-            if (storagePath().isEmpty()) {
-                throw new IllegalArgumentException("Storage path must be set");
-            }
-        } else {
-            if (!storagePath().isEmpty()) {
-                throw new IllegalArgumentException(
-                        "Storage path must be empty");
-            }
-        }
-        putBoolean(UrlRequestContextConfigList.LOAD_DISABLE_CACHE,
-                cacheMode == HTTP_CACHE_DISABLED || cacheMode == HTTP_CACHE_DISK_NO_HTTP);
-        putLong(UrlRequestContextConfigList.HTTP_CACHE_MAX_SIZE, maxSize);
-
-        switch (cacheMode) {
-            case HTTP_CACHE_DISABLED:
-                return putString(UrlRequestContextConfigList.HTTP_CACHE,
-                        UrlRequestContextConfigList.HTTP_CACHE_DISABLED);
-            case HTTP_CACHE_DISK_NO_HTTP:
-            case HTTP_CACHE_DISK:
-                return putString(UrlRequestContextConfigList.HTTP_CACHE,
-                        UrlRequestContextConfigList.HTTP_CACHE_DISK);
-
-            case HTTP_CACHE_IN_MEMORY:
-                return putString(UrlRequestContextConfigList.HTTP_CACHE,
-                        UrlRequestContextConfigList.HTTP_CACHE_MEMORY);
-        }
-        return this;
-    }
-
-    /**
-     * Adds hint that {@code host} supports QUIC.
-     * Note that {@link #enableHttpCache enableHttpCache}
-     * ({@link HttpCache#DISK DISK}) is needed to take advantage of 0-RTT
-     * connection establishment between sessions.
-     *
-     * @param host hostname of the server that supports QUIC.
-     * @param port host of the server that supports QUIC.
-     * @param alternatePort alternate port to use for QUIC.
-     * @return the config to facilitate chaining.
-     */
-    public UrlRequestContextConfig addQuicHint(String host,
-            int port,
-            int alternatePort) {
-        if (host.contains("/")) {
-            throw new IllegalArgumentException("Illegal QUIC Hint Host: "
-                                               + host);
-        }
-        try {
-            JSONArray quicHints = mConfig.optJSONArray(
-                    UrlRequestContextConfigList.QUIC_HINTS);
-            if (quicHints == null) {
-                quicHints = new JSONArray();
-                mConfig.put(UrlRequestContextConfigList.QUIC_HINTS, quicHints);
-            }
-
-            JSONObject hint = new JSONObject();
-            hint.put(UrlRequestContextConfigList.QUIC_HINT_HOST, host);
-            hint.put(UrlRequestContextConfigList.QUIC_HINT_PORT, port);
-            hint.put(UrlRequestContextConfigList.QUIC_HINT_ALT_PORT,
-                     alternatePort);
-            quicHints.put(hint);
-        } catch (JSONException e) {
-            // Intentionally do nothing.
-        }
-        return this;
-    }
-
-    /**
-     * Sets experimental QUIC connection options, overwriting any pre-existing
-     * options. List of options is subject to change.
-     *
-     * @param quicConnectionOptions comma-separated QUIC options (for example
-     * "PACE,IW10") to use if QUIC is enabled.
-     * @return the config to facilitate chaining.
-     */
-    public UrlRequestContextConfig setExperimentalQuicConnectionOptions(
-            String quicConnectionOptions) {
-        return putString(UrlRequestContextConfigList.QUIC_OPTIONS,
-                         quicConnectionOptions);
-    }
-
-    /**
-     * Get JSON string representation of the config.
-     */
-    @Override
-    public String toString() {
-        return mConfig.toString();
-    }
-
-    /**
-     * Sets a boolean value in the config. Returns a reference to the same
-     * config object, so you can chain put calls together.
-     * @return the config to facilitate chaining.
-     */
-    private UrlRequestContextConfig putBoolean(String key, boolean value) {
-        try {
-            mConfig.put(key, value);
-        } catch (JSONException e) {
-            // Intentionally do nothing.
-        }
-        return this;
-    }
-
-    /**
-     * Sets a long value in the config. Returns a reference to the same
-     * config object, so you can chain put calls together.
-     * @return the config to facilitate chaining.
-     */
-    private UrlRequestContextConfig putLong(String key, long value)  {
-        try {
-            mConfig.put(key, value);
-        } catch (JSONException e) {
-            // Intentionally do nothing.
-        }
-        return this;
-    }
-
-    /**
-     * Sets a string value in the config. Returns a reference to the same
-     * config object, so you can chain put calls together.
-     * @return the config to facilitate chaining.
-     */
-    private UrlRequestContextConfig putString(String key, String value) {
-        try {
-            mConfig.put(key, value);
-        } catch (JSONException e) {
-            // Intentionally do nothing.
-        }
-        return this;
+        // Context will be passed in later when the ChromiumUrlRequestFactory
+        // or ChromiumUrlRequestContext is created.
+        super(null, json);
     }
 }