/*
 * Copyright 2003 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

package com.sun.java.util.jar.pack;

import java.util.*;
import java.util.jar.*;
import java.util.jar.Pack200;
import java.util.zip.*;
import java.io.*;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
/**
 * Control block for publishing Pack200 options to the other classes.
 */
class PropMap extends TreeMap {
    ArrayList _listeners = new ArrayList(1);

    void addListener(PropertyChangeListener listener) {
        _listeners.add(listener);
    }

    void removeListener(PropertyChangeListener listener) {
        _listeners.remove(listener);
    }

    void addListeners(ArrayList listeners) {
        _listeners.addAll(listeners);
    }

    void removeListeners(ArrayList listeners) {
        _listeners.removeAll(listeners);
    }

    // Override:
    public Object put(Object key, Object value) {
        Object oldValue = super.put(key, value);
        if (value != oldValue && _listeners.size() > 0) {
            // Post the property change event.
            PropertyChangeEvent event =
                new PropertyChangeEvent(this, (String) key,
                                        oldValue, value);
            for (Iterator i = _listeners.iterator(); i.hasNext(); ) {
                PropertyChangeListener listener =
                    (PropertyChangeListener) i.next();
                listener.propertyChange(event);
            }
        }
        return oldValue;
    }

    // All this other stuff is private to the current package.
    // Outide clients of Pack200 do not need to use it; they can
    // get by with generic SortedMap functionality.
    private static Map defaultProps;
    static {
        Properties props = new Properties();

        // Allow implementation selected via -Dpack.disable.native=true
        props.put(Utils.DEBUG_DISABLE_NATIVE,
                  String.valueOf(Boolean.getBoolean(Utils.DEBUG_DISABLE_NATIVE)));

        // Set the DEBUG_VERBOSE from system
        props.put(Utils.DEBUG_VERBOSE,
                  String.valueOf(Integer.getInteger(Utils.DEBUG_VERBOSE,0)));

        // Set the PACK_TIMEZONE_NO_UTC
        props.put(Utils.PACK_DEFAULT_TIMEZONE,
                  String.valueOf(Boolean.getBoolean(Utils.PACK_DEFAULT_TIMEZONE)));

        // Limit segment size to less than a megabyte.
        props.put(Pack200.Packer.SEGMENT_LIMIT, ""+(1*1000*1000));

        // Preserve file ordering by default.
        props.put(Pack200.Packer.KEEP_FILE_ORDER, Pack200.Packer.TRUE);

        // Preserve all modification times by default.
        props.put(Pack200.Packer.MODIFICATION_TIME, Pack200.Packer.KEEP);

        // Preserve deflation hints by default.
        props.put(Pack200.Packer.DEFLATE_HINT, Pack200.Packer.KEEP);

        // Pass through files with unrecognized attributes by default.
        props.put(Pack200.Packer.UNKNOWN_ATTRIBUTE, Pack200.Packer.PASS);

        // Default effort is 5, midway between 1 and 9.
        props.put(Pack200.Packer.EFFORT, "5");

        // Define certain attribute layouts by default.
        // Do this after the previous props are put in place,
        // to allow override if necessary.
        try {
            String propFile = "intrinsic.properties";
            InputStream propStr = PackerImpl.class.getResourceAsStream(propFile);
            props.load(new BufferedInputStream(propStr));
            propStr.close();
            for (Iterator i = props.entrySet().iterator(); i.hasNext(); ) {
                Map.Entry e = (Map.Entry) i.next();
                String key = (String) e.getKey();
                String val = (String) e.getValue();
                if (key.startsWith("attribute.")) {
                    e.setValue(Attribute.normalizeLayoutString(val));
                }
            }
        } catch (IOException ee) {
            throw new RuntimeException(ee);
        }

        defaultProps = (new HashMap(props));  // shrink to fit
    }

    PropMap() {
        putAll(defaultProps);
    }

    // Return a view of this map which includes only properties
    // that begin with the given prefix.  This is easy because
    // the map is sorted, and has a subMap accessor.
    SortedMap prefixMap(String prefix) {
        int len = prefix.length();
        if (len == 0)
            return this;
        char nextch = (char)(prefix.charAt(len-1) + 1);
        String limit = prefix.substring(0, len-1)+nextch;
        //System.out.println(prefix+" => "+subMap(prefix, limit));
        return subMap(prefix, limit);
    }

    String getProperty(String s) {
        return (String) get(s);
    }
    String getProperty(String s, String defaultVal) {
        String val = getProperty(s);
        if (val == null)
            return defaultVal;
        return val;
    }
    String setProperty(String s, String val) {
        return (String) put(s, val);
    }

    // Get sequence of props for "prefix", and "prefix.*".
    List getProperties(String prefix) {
        Collection values = prefixMap(prefix).values();
        ArrayList res = new ArrayList(values.size());
        res.addAll(values);
        while (res.remove(null));
        return res;
    }

    private boolean toBoolean(String val) {
        return Boolean.valueOf(val).booleanValue();
    }
    boolean getBoolean(String s) {
        return toBoolean(getProperty(s));
    }
    boolean setBoolean(String s, boolean val) {
        return toBoolean(setProperty(s, String.valueOf(val)));
    }

    int toInteger(String val) {
        if (val == null)  return 0;
        if (Pack200.Packer.TRUE.equals(val))   return 1;
        if (Pack200.Packer.FALSE.equals(val))  return 0;
        return Integer.parseInt(val);
    }
    int getInteger(String s) {
        return toInteger(getProperty(s));
    }
    int setInteger(String s, int val) {
        return toInteger(setProperty(s, String.valueOf(val)));
    }

    long toLong(String val) {
        try {
            return val == null ? 0 : Long.parseLong(val);
        } catch (java.lang.NumberFormatException nfe) {
            throw new IllegalArgumentException("Invalid value");
        }
    }
    long getLong(String s) {
        return toLong(getProperty(s));
    }
    long setLong(String s, long val) {
        return toLong(setProperty(s, String.valueOf(val)));
    }

    int getTime(String s) {
        String sval = getProperty(s, "0");
        if (Utils.NOW.equals(sval)) {
            return (int)((System.currentTimeMillis()+500)/1000);
        }
        long lval = toLong(sval);
        final long recentSecondCount = 1000000000;

        if (lval < recentSecondCount*10 && !"0".equals(sval))
            Utils.log.warning("Supplied modtime appears to be seconds rather than milliseconds: "+sval);

        return (int)((lval+500)/1000);
    }

    void list(PrintStream out) {
        PrintWriter outw = new PrintWriter(out);
        list(outw);
        outw.flush();
    }
    void list(PrintWriter out) {
        out.println("#"+Utils.PACK_ZIP_ARCHIVE_MARKER_COMMENT+"[");
        Set defaults = defaultProps.entrySet();
        for (Iterator i = entrySet().iterator(); i.hasNext(); ) {
            Map.Entry e = (Map.Entry) i.next();
            if (defaults.contains(e))  continue;
            out.println("  " + e.getKey() + " = " + e.getValue());
        }
        out.println("#]");
    }
}