com.sap.prd.mobile.ios.mios.EffectiveBuildSettings.java Source code

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Here is the source code for com.sap.prd.mobile.ios.mios.EffectiveBuildSettings.java

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package com.sap.prd.mobile.ios.mios;

/*
 * #%L
 * Xcode Maven Plugin
 * %%
 * Copyright (C) 2012 SAP AG
 * %%
 * 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.
 * #L%
 */

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.nio.charset.Charset;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.logging.LogManager;
import java.util.logging.Logger;

import org.apache.commons.io.IOUtils;

public class EffectiveBuildSettings implements IEffectiveBuildSettings {

    private final static Logger LOGGER = LogManager.getLogManager().getLogger(XCodePluginLogger.getLoggerName());

    private final static Map<IXCodeContext, Properties> buildSettings = new HashMap<IXCodeContext, Properties>();

    @Override
    public String getBuildSettingByKey(IXCodeContext context, String key) {
        try {
            return getBuildSetting(context, key);
        } catch (XCodeException e) {
            throw new IllegalStateException("Cannot obtain build setting for key '" + key + "' for configuration '"
                    + context.getConfiguration() + "' and sdk '" + context.getSDK() + "'.", e);
        }
    }

    public static String getBuildSetting(IXCodeContext context, String key) throws XCodeException {
        String buildSetting = getBuildSettings(context).getProperty(key);
        LOGGER.finer(
                "Build settings for context '" + context + "'. Key: '" + key + "' resolved to: " + buildSetting);
        return buildSetting;
    }

    private static synchronized Properties getBuildSettings(final IXCodeContext context) throws XCodeException {

        Properties _buildSettings = buildSettings.get(context);

        if (_buildSettings == null) {
            _buildSettings = extractBuildSettings(context);
            buildSettings.put(context, _buildSettings);
            LOGGER.info("Build settings for context: " + context + " loaded:" + toString(_buildSettings));
        } else {
            LOGGER.finer("Build settings for key: '" + context + " found in cache.");
        }

        return _buildSettings;
    }

    private static String toString(Properties buildSettings) {
        String ls = System.getProperty("line.separator");
        StringBuilder sb = new StringBuilder(ls);

        for (Map.Entry<?, ?> e : buildSettings.entrySet()) {
            sb.append(e.getKey()).append("=").append(e.getValue()).append(ls);
        }
        return sb.toString();
    }

    private static Properties extractBuildSettings(final IXCodeContext context) throws XCodeException {
        List<String> buildActions = Collections.emptyList();
        IOptions options = context.getOptions();
        Map<String, String> managedOptions = new HashMap<String, String>(options.getManagedOptions());
        managedOptions.put(Options.ManagedOption.SHOWBUILDSETTINGS.getOptionName(), null);

        XCodeContext showBuildSettingsContext = new XCodeContext(buildActions, context.getProjectRootDirectory(),
                context.getOut(),
                new Settings(context.getSettings().getUserSettings(), context.getSettings().getManagedSettings()),
                new Options(options.getUserOptions(), managedOptions));

        final CommandLineBuilder cmdLineBuilder = new CommandLineBuilder(showBuildSettingsContext);
        PrintStream out = null;
        ByteArrayOutputStream os = null;
        try {
            os = new ByteArrayOutputStream();
            out = new PrintStream(os, true, Charset.defaultCharset().name());

            final int returnValue = Forker.forkProcess(out, context.getProjectRootDirectory(),
                    cmdLineBuilder.createBuildCall());

            if (returnValue != 0) {
                if (out != null)
                    out.flush();
                throw new XCodeException(
                        "Could not execute xcodebuild -showBuildSettings command for configuration "
                                + context.getConfiguration() + " and sdk " + context.getSDK() + ": "
                                + new String(os.toByteArray(), Charset.defaultCharset().name()));
            }

            out.flush();
            Properties prop = new Properties();
            prop.load(new ByteArrayInputStream(os.toByteArray()));
            return prop;

        } catch (IOException ex) {
            throw new XCodeException("Cannot extract build properties: " + ex.getMessage(), ex);
        } finally {
            IOUtils.closeQuietly(out);
        }
    }
}