/*

 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package com.sun.tools.sjavac;

import java.io.*;

import java.net.URI;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

import java.util.Set;

import java.util.HashSet;

import java.util.Map;

import java.util.Properties;

import com.sun.tools.sjavac.options.Options;

import com.sun.tools.sjavac.server.Sjavac;

/**

 * The clean properties transform should not be necessary.

 * Eventually we will cleanup the property file sources in the OpenJDK instead.

 *

 *  <p><b>This is NOT part of any supported API.

 *  If you write code that depends on this, you do so at your own risk.

 *  This code and its internal interfaces are subject to change or

 *  deletion without notice.</b>

 */

public class CleanProperties implements Transformer {

    public void setExtra(String e) {

        // Any extra information is ignored for clean properties.

    }

    public void setExtra(Options a) {

        // Any extra information is ignored for clean properties.

    }

    public boolean transform(Sjavac sjavac,

                             Map<String,Set<URI>> pkgSrcs,

                             Set<URI>             visibleSrcs,

                             Map<URI,Set<String>> visibleClasses,

                             Map<String,Set<String>> oldPackageDependencies,

                             URI destRoot,

                             Map<String,Set<URI>>    packageArtifacts,

                             Map<String,Set<String>> packageDependencies,

                             Map<String,String>      packagePublicApis,

                             int debugLevel,

                             boolean incremental,

                             int numCores,

                             PrintStream out,

                             PrintStream err) {

        boolean rc = true;

        for (String pkgName : pkgSrcs.keySet()) {

            String pkgNameF = pkgName.replace('.',File.separatorChar);

            for (URI u : pkgSrcs.get(pkgName)) {

                File src = new File(u);

                boolean r = clean(pkgName, pkgNameF, src, new File(destRoot), debugLevel,

                                  packageArtifacts);

                if (r == false) {

                    rc = false;

                }

            }

        }

        return rc;

    }

    boolean clean(String pkgName,

                  String pkgNameF,

                  File src,

                  File destRoot,

                  int debugLevel,

                  Map<String,Set<URI>> packageArtifacts) {

        // Load the properties file.

        Properties p = new Properties();

        try {

            p.load(new FileInputStream(src));

        } catch (IOException e) {

            Log.error("Error reading file "+src.getPath());

            return false;

        }

        // Sort the properties in increasing key order.

        List<String> sortedKeys = new ArrayList<>();

        for (Object key : p.keySet()) {

            sortedKeys.add((String)key);

        }

        Collections.sort(sortedKeys);

        // Collect the properties into a string buffer.

        StringBuilder data = new StringBuilder();

        for (String key : sortedKeys) {

            data.append(CompileProperties.escape(key))

                .append(":")

                .append(CompileProperties.escape((String) p.get(key)))

                .append("\n");

        }

        String destFilename = destRoot.getPath()+File.separator+pkgNameF+File.separator+src.getName();

        File dest = new File(destFilename);

        // Make sure the dest directories exist.

        if (!dest.getParentFile().isDirectory()) {

            if (!dest.getParentFile().mkdirs()) {

                Log.error("Could not create the directory "+dest.getParentFile().getPath());

                return false;

            }

        }

        Set<URI> as = packageArtifacts.get(pkgName);

        if (as == null) {

            as = new HashSet<>();

            packageArtifacts.put(pkgName, as);

        }

        as.add(dest.toURI());

        if (dest.exists() && dest.lastModified() > src.lastModified()) {

            // A cleaned property file exists, and its timestamp is newer than the source.

            // Assume that we do not need to clean!

            // Thus we are done.

            return true;

        }

        Log.info("Cleaning property file "+pkgNameF+File.separator+src.getName());

        try (Writer writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(dest)))) {

            writer.write(data.toString());

        } catch ( IOException e ) {

            Log.error("Could not write file "+dest.getPath());

            return false;

        }

        return true;

    }

}