com.facebook.buck.apple.xcode.xcspec.SDKSettings.java Source code

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Here is the source code for com.facebook.buck.apple.xcode.xcspec.SDKSettings.java

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/*
 * Copyright 2014-present Facebook, Inc.
 *
 * 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.facebook.buck.apple.xcode.xcspec;

import com.dd.plist.NSDictionary;
import com.dd.plist.NSObject;
import com.dd.plist.NSString;
import com.dd.plist.PropertyListParser;
import com.google.common.collect.ImmutableMap;

import java.io.InputStream;

/**
 * Parsing logic for SDKSettings property list file that ships with Xcode.
 */
public final class SDKSettings {
    /**
     * Key into the default properties dictionary for the default compiler identifier.
     */
    public static final String DEFAULT_COMPILER_KEY = "DEFAULT_COMPILER";
    private static final String DEFAULT_PROPERTIES_KEY = "DefaultProperties";

    // Utility class. Do not instantiate.
    private SDKSettings() {
    }

    /**
     * Parses the contents of the provided SDKSettings.plist input stream
     * and extracts the dictionary of DefaultProperties values.
     */
    public static void parseDefaultPropertiesFromPlist(InputStream sdkSettingsPlist,
            ImmutableMap.Builder<String, String> defaultPropertiesBuilder) throws Exception {
        NSObject sdkSettings = PropertyListParser.parse(sdkSettingsPlist);
        if (!(sdkSettings instanceof NSDictionary)) {
            throw new RuntimeException(
                    "Unexpected SDKSettings.plist contents (expected NSDictionary, got " + sdkSettings + ")");
        }
        getDefaultPropertiesFromNSDictionary((NSDictionary) sdkSettings, defaultPropertiesBuilder);
    }

    private static void getDefaultPropertiesFromNSDictionary(NSDictionary sdkSettingsDict,
            ImmutableMap.Builder<String, String> defaultPropertiesBuilder) {
        NSObject defaultProperties = sdkSettingsDict.objectForKey(DEFAULT_PROPERTIES_KEY);
        if (!(defaultProperties instanceof NSDictionary)) {
            throw new RuntimeException("Unexpected " + DEFAULT_PROPERTIES_KEY
                    + " contents (expected NSDictionary, got " + defaultProperties + ")");
        }
        NSDictionary defaultPropertiesDict = (NSDictionary) defaultProperties;
        for (String key : defaultPropertiesDict.allKeys()) {
            NSObject value = defaultPropertiesDict.objectForKey(key);
            if (!(value instanceof NSString)) {
                throw new RuntimeException(
                        "Unexpected key " + key + " contents (expected NSString, got " + value + ")");
            }
            NSString stringValue = (NSString) value;
            defaultPropertiesBuilder.put(key, stringValue.toString());
        }
    }
}