com.facebook.buck.apple.xcode.ProjectParser.java Source code

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Here is the source code for com.facebook.buck.apple.xcode.ProjectParser.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;

import com.dd.plist.NSDictionary;
import com.dd.plist.NSObject;
import com.dd.plist.NSString;
import com.dd.plist.PropertyListParser;

import com.facebook.buck.util.HumanReadableException;

import com.google.common.collect.ImmutableMap;

import java.io.InputStream;
import java.io.IOException;

/**
 * Parser for xcode project files.
 */
public class ProjectParser {

    // Utility class; do not instantiate.
    private ProjectParser() {
    }

    /**
     * Given an input stream opened to a project.pbxproj file, extracts
     * all the objects and returns a dictionary of {GID: ObjectNSDictionary} pairs.
     */
    public static NSDictionary extractObjectsFromXcodeProject(InputStream projectInputStream) throws IOException {
        NSObject rootObject;
        try {
            rootObject = PropertyListParser.parse(projectInputStream);
        } catch (IOException e) {
            throw e;
        } catch (Exception e) {
            rootObject = null;
        }
        if (!(rootObject instanceof NSDictionary)) {
            throw new HumanReadableException("Malformed Xcode project");
        }
        NSDictionary rootDictionary = (NSDictionary) rootObject;
        NSObject objects = rootDictionary.objectForKey("objects");
        if (!(objects instanceof NSDictionary)) {
            throw new HumanReadableException("Malformed Xcode project");
        }
        return (NSDictionary) objects;
    }

    /**
     * Given a dictionary of {GID: ObjectNSDictionary} pairs and a
     * builder, writes into the builder the {TargetName: TargetGID}
     * pairs for all objects of PBXTarget subtype.
     */
    public static void extractTargetNameToGIDMap(NSDictionary objects,
            ImmutableMap.Builder<String, String> targetNamesToGIDs) {
        for (String gid : objects.allKeys()) {
            NSObject object = objects.objectForKey(gid);
            if (!(object instanceof NSDictionary)) {
                throw new HumanReadableException("Malformed Xcode project (non-dictionary object)");
            }
            NSDictionary objectDict = (NSDictionary) object;
            NSObject isa = objectDict.objectForKey("isa");
            if (!(isa instanceof NSString)) {
                throw new HumanReadableException("Malformed Xcode project (non-string isa)");
            }
            // No need really to cast here just to call toString().
            switch (isa.toString()) {
            case "PBXNativeTarget":
                // Fall through.
            case "PBXAggregateTarget": {
                NSObject name = objectDict.objectForKey("name");
                if (!(name instanceof NSString)) {
                    throw new HumanReadableException("Malformed Xcode project (non-string name)");
                }
                targetNamesToGIDs.put(name.toString(), gid);
                break;
            }
            }
        }
    }
}