Songdb java version, source. only 1.5 compatible

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7101 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 81 insertions, 0 deletions

diff --git a/songdbj/RuntimeDatabase.java b/songdbj/RuntimeDatabase.java
new file mode 100644
index 0000000..e96e820
--- /dev/null
+++ b/songdbj/RuntimeDatabase.java
@@ -0,0 +1,81 @@
+import java.util.*;
+import java.io.*;
+import java.lang.reflect.Array;
+
+/*
+	TreeSet for runtimedatabase with entry hash used in compareto
+	fix commandline interface.
+*/
+
+public class RuntimeDatabase {
+	protected static RuntimeDatabase instance=null;
+	protected TreeMap entries;
+	protected int entrycount;
+	public static final int headersize = 8;
+	
+	protected RuntimeDatabase() {
+		entries=new TreeMap();
+	}
+	
+	public static RuntimeDatabase getInstance() {
+		if(instance==null)
+			instance=new RuntimeDatabase();
+		return instance;
+	}
+	
+  public RundbEntry getEntry(FileEntry file) {
+  	Integer key = new Integer(file.getHash());
+		if(!entries.containsKey(key)) {
+			RundbEntry e = new RundbEntry(file);
+		  entries.put(key,e);
+		  return e;
+		}
+		else
+		  return (RundbEntry)entries.get(key);
+	}
+
+	protected void calcOffsets() {
+	  Collection values = entries.values();
+		Iterator i;
+		int offset=headersize;
+		i=values.iterator();
+		while(i.hasNext()) {
+			Entry e = (Entry) i.next();
+			e.setOffset(offset);
+			offset+=RundbEntry.entrySize();
+		}
+		entrycount=values.size();
+	}
+
+	public int isDirty() {
+		return 0;
+	}
+
+	protected void writeHeader(DataOutputStream w) throws IOException {
+		w.write('R');
+		w.write('R');
+		w.write('D');
+		w.write(0x1);
+		w.writeInt(entrycount);
+	}
+
+	public void prepareWrite() {
+		System.out.println("Calculating Runtime Database Offsets..");
+		calcOffsets();
+	}
+
+	public void writeDatabase(File f) throws IOException {
+		int x;
+		Iterator i;
+		DataOutputStream w = new DataOutputStream(new FileOutputStream(f));
+		System.out.println("Writing runtime database..");
+		writeHeader(w);
+		i=entries.values().iterator();
+		while(i.hasNext()) {
+			Entry e = (Entry) i.next();
+			e.write(w);
+		}
+		w.flush();
+		w.close();
+	}
+}
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