path: root/NET/worlds/scape/Restorer.java

package NET.worlds.scape;

import NET.worlds.core.IniFile;
import NET.worlds.network.URL;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;

public class Restorer {
   private DataInput is;
   private boolean myFile;
   private Hashtable<Integer, Class<?>> classTable;
   private Hashtable<Object, Persister> objectTable;
   private Hashtable<Object, Integer> cookieTable;
   private URL reference;
   private int _version;
   private boolean _oldFlag;
   private int _dblevel = 0;
   private Integer _firstRead = null;

   public URL getReferenceURL() {
      return this.reference;
   }

   public final int version() {
      return this._version;
   }

   private Restorer(String fileName) throws IOException, BadFormatException, TooNewException {
      this(new DataInputStream(new FileInputStream(new File(fileName))));
      if (this._dblevel > 0) {
         System.out.println("Restoring from " + fileName);
      }

      this.myFile = true;
   }

   public Restorer(String fileName, URL url) throws IOException, BadFormatException, TooNewException {
      this(fileName);
      this.reference = url;
   }

   public Restorer(URL url) throws IOException, BadFormatException, TooNewException {
      this(url.unalias(), url);
   }

   public Restorer(DataInput is) throws IOException, BadFormatException, TooNewException {
      this.is = is;
      this._dblevel = IniFile.gamma().getIniInt("RESTORE_DEBUG", 0);
      String header = this.restoreString();
      if (header != null && header.equals("PERSISTER Worlds, Inc.")) {
         this._version = this.restoreInt();
         if (this._dblevel > 0) {
            System.out.println("Persister version " + this._version + " {");
         }

         if (this._version < 1) {
            throw new BadFormatException();
         } else if (this._version > Saver.version()) {
            throw new TooNewException();
         } else {
            this.classTable = new Hashtable<Integer, Class<?>>();
            this.objectTable = new Hashtable<Object, Persister>();
            this.cookieTable = new Hashtable<Object, Integer>();
         }
      } else {
         throw new BadFormatException();
      }
   }

   public Restorer(DataInput is, URL url) throws IOException, BadFormatException, TooNewException {
      this(is);
      this.reference = url;
   }

   public int restoreVersion(Object cookie) throws IOException {
      if (this._version == 1) {
         return 0;
      } else {
         Integer oldv = this.cookieTable.get(cookie);
         int v;
         if (oldv == null) {
            v = this.restoreInt();
            this.cookieTable.put(cookie, new Integer(v));
         } else {
            v = oldv;
         }

         return v;
      }
   }

   public Persister restore() throws IOException, TooNewException {
      return this.restore(true);
   }

   public Persister restore(boolean restoreContents) throws IOException, TooNewException {
      boolean firstCall = this._firstRead == null;
      Integer hc = new Integer(this.restoreInt());
      if (this._dblevel > 0) {
         System.out.print("Object:" + Integer.toString(hc, 16));
      }

      if (this.objectTable.containsKey(hc)) {
         Persister obj = this.objectTable.get(hc);
         if (this._dblevel > 0) {
            System.out.println(" - old: " + obj.getClass().getName() + " (" + Integer.toString(hc, 16) + ")");
         }

         return obj;
      } else {
         Persister p = null;

         try {
            Class<?> c = this.restoreClass(true);
            if (this._dblevel > 0) {
               System.out.println(" {");
            }

            try {
               p = (Persister)c.newInstance();
            } catch (NoSuchMethodError var7) {
               System.out.println(c);
               var7.printStackTrace(System.out);
               throw var7;
            }
         } catch (InstantiationException var8) {
            var8.printStackTrace(System.out);

            assert false;
         } catch (IllegalAccessException var9) {
            var9.printStackTrace(System.out);

            assert false;
         }

         this.objectTable.put(hc, p);
         if (restoreContents) {
            p.restoreState(this);
         }

         if (this._dblevel > 0) {
            System.out.println((restoreContents ? "} Done with: " : "} Created: ") + Integer.toString(hc, 16));
         }

         Persister obj = this.objectTable.get(hc);
         if (firstCall) {
            this._firstRead = hc;
         }

         return obj;
      }
   }

   public Vector<Object> restoreVectorMaybeNull() throws IOException, TooNewException {
      return this.restoreBoolean() ? this.restoreVector() : null;
   }

   public Persister restoreMaybeNull() throws IOException, TooNewException {
      if (this.restoreBoolean()) {
         if (this._dblevel > 0) {
            System.out.println("null");
         }

         return null;
      } else {
         return this.restore();
      }
   }

   public Class<?> restoreClass() throws IOException {
      return this.restoreClass(true);
   }

   public Class<?> restoreClass(boolean printdebug) throws IOException {
      Class<?> c = null;
      Integer classhc = new Integer(this.restoreInt());
      if (this.classTable.containsKey(classhc)) {
         c = this.classTable.get(classhc);
         if (this._dblevel > 0 && printdebug) {
            System.out.print("..." + c.getName() + " [" + Integer.toString(classhc, 16) + "]");
         }
      } else {
         String s = this.restoreString();
         if (this._dblevel > 0 && printdebug) {
            System.out.print("---" + s + " [" + Integer.toString(classhc, 16) + "]");
         }

         try {
            c = Class.forName(s);
         } catch (ClassNotFoundException var8) {
            try {
               if (s.equals("NET.worlds.network.World")) {
                  if (this._dblevel > 0) {
                     System.out.print(" (Converting NET.worlds.network.World to NET.worlds.scape.World)");
                  }

                  c = Class.forName("NET.worlds.scape.World");
               } else {
                  if (this._dblevel > 0) {
                     System.out.print(" (Converting " + s + " to NET.worlds.scape." + s + ")");
                  }

                  c = Class.forName("NET.worlds.scape." + s);
               }
            } catch (ClassNotFoundException var7) {
               throw new Error("Can't find class " + s);
            }
         }

         this.classTable.put(classhc, c);
      }

      return c;
   }

   private Object makeArray(Class<?> var1, int var2) {
      return java.lang.reflect.Array.newInstance(var1, var2);
   }

   public Persister[] restoreArray() throws IOException, TooNewException {
      Class<?> arrayclass = null;
      if (this._version > 4) {
         arrayclass = this.restoreClass(false);
      }

      int length = this.restoreInt();
      Persister[] pa = (Persister[])null;
      if (arrayclass == null) {
         if (this._dblevel > 0) {
            System.out.println("Array of " + Integer.toString(length, 16) + " items {");
         }

         pa = new Persister[length];
      } else {
         String classname = arrayclass.getName();

         assert classname.startsWith("[L");

         assert classname.endsWith(";");

         classname = classname.substring(2);
         classname = classname.substring(0, classname.length() - 1);
         if (this._dblevel > 0) {
            System.out.println("Array of " + Integer.toString(length, 16) + " " + classname + " {");
         }

         try {
            arrayclass = Class.forName(classname);
         } catch (ClassNotFoundException var6) {
            throw new Error("Can't find class " + classname.substring(1));
         }

         Object ob = this.makeArray(arrayclass, length);
         pa = (Persister[])ob;
      }

      for (int i = 0; i < length; i++) {
         pa[i] = this.restoreMaybeNull();
      }

      if (this._dblevel > 0) {
         System.out.println("} Done with array");
      }

      return pa;
   }

   public Vector<Object> restoreVector() throws IOException, TooNewException {
      int length = this.restoreInt();
      if (this._dblevel > 0) {
         System.out.println("Vector of " + Integer.toString(length, 16) + " items {");
      }

      Vector<Object> v = new Vector<Object>(length);

      for (int i = 0; i < length; i++) {
         v.addElement(this.restore());
      }

      if (this._dblevel > 0) {
         System.out.println("} Done with vector");
      }

      return v;
   }

   public Vector<SuperRoot> restoreVectorSuperRoot() throws IOException, TooNewException {
      int length = this.restoreInt();
      if (this._dblevel > 0) {
         System.out.println("Vector of " + Integer.toString(length, 16) + " items {");
      }

      Vector<SuperRoot> v = new Vector<SuperRoot>(length);

      for (int i = 0; i < length; i++) {
         v.addElement((SuperRoot)this.restore());
      }

      if (this._dblevel > 0) {
         System.out.println("} Done with vector");
      }

      return v;
   }

   public Vector<Action> restoreVectorActions() throws IOException, TooNewException {
      int length = this.restoreInt();
      if (this._dblevel > 0) {
         System.out.println("Vector of " + Integer.toString(length, 16) + " items {");
      }

      Vector<Action> v = new Vector<Action>(length);

      for (int i = 0; i < length; i++) {
         v.addElement((Action)this.restore());
      }

      if (this._dblevel > 0) {
         System.out.println("} Done with vector");
      }

      return v;
   }

   public String restoreString() throws IOException {
      return this.restoreBoolean() ? null : this.is.readUTF();
   }

   public boolean restoreBoolean() throws IOException {
      return this.is.readBoolean();
   }

   public byte restoreByte() throws IOException {
      return this.is.readByte();
   }

   public short restoreShort() throws IOException {
      return this.is.readShort();
   }

   public int restoreInt() throws IOException {
      return this.is.readInt();
   }

   public long restoreLong() throws IOException {
      return this.is.readLong();
   }

   public float restoreFloat() throws IOException {
      return this.is.readFloat();
   }

   public double restoreDouble() throws IOException {
      return this.is.readDouble();
   }

   public void done() throws IOException, Error {
      if (this._dblevel > 0) {
         System.out.println("Calling all postRestores");
      }

      Enumeration<Persister> e = this.objectTable.elements();

      while (e.hasMoreElements()) {
         Persister p = e.nextElement();
         p.postRestore(this._version);
      }

      e = this.objectTable.elements();

      while (e.hasMoreElements()) {
         Object obj = e.nextElement();
         if (obj != this.objectTable.get(this._firstRead) && obj instanceof SuperRoot) {
            SuperRoot s = (SuperRoot)obj;
            if (s.getOwner() == null) {
               System.out.println("Warning: " + s.getName() + " was not owned by any object.");
               s.finalize();
            }
         }
      }

      String trailer = this.restoreString();
      if (!trailer.equals("END PERSISTER")) {
         throw new Error("Format error in save file");
      } else {
         if (this.myFile) {
            ((DataInputStream)this.is).close();
         }

         this.classTable = null;
         this.objectTable = null;
         this.cookieTable = null;
         if (this._dblevel > 0) {
            System.out.println("} Done with persister");
         }
      }
   }

   public void setOldFlag() {
      this._oldFlag = true;
      if (this._dblevel > 0) {
         System.out.println("----OLD!----");
      }
   }

   public boolean oldFlag() {
      return this._oldFlag;
   }

   public void replace(Persister old, Persister replacement) {
      System.out.println("Converting a " + old.getClass().getName() + " to a " + replacement.getClass().getName());
      boolean found = false;
      Enumeration<Object> oe = this.objectTable.keys();

      while (oe.hasMoreElements()) {
         Object k = oe.nextElement();
         if (this.objectTable.get(k) == old) {
            this.objectTable.put(k, replacement);
            found = true;
            break;
         }
      }

      assert found;
   }
}