drop the SG library completely.

3 files changed, 0 insertions, 120 deletions

diff --git a/src/runtime/java/org/grammaticalframework/sg/SG.java b/src/runtime/java/org/grammaticalframework/sg/SG.java
deleted file mode 100644
index 64dd6b511..000000000
--- a/src/runtime/java/org/grammaticalframework/sg/SG.java
+++ /dev/null
@@ -1,56 +0,0 @@
-package org.grammaticalframework.sg;
-
-import java.io.Closeable;
-import org.grammaticalframework.pgf.*;
-
-/** This class represents a connection to a semantic graph database.
- * The semantic graph is a graph represented as a set of tripples
- * of abstract expressions. The graph can be used for instance to store
- * semantic information for entities in a GF grammar.
- */
-public class SG implements Closeable {
-	/** Opens a new database file. */
-	public static native SG openSG(String path) throws SGError;
-	
-	/** Closes an already opened database. */
-	public native void close() throws SGError;
-
-	/** Reads a triple in the format <expr,expr,expr> and returns it as an array. */
-	public static native Expr[] readTriple(String s) throws PGFError;
-
-	/** Simple triple queries.
-	 * Each of the arguments subj, pred and obj could be null. 
-	 * A null argument is interpreted as a wild card.
-	 * If one of the arguments is not null then only triples with matching values
-	 * will be retrieved.  
-	 * 
-	 * @return An iterator over the matching triples.
-	 */
-	public native TripleResult queryTriple(Expr subj, Expr pred, Expr obj) throws SGError;
-
-	/** Starts a new transaction. */
-	public native void beginTrans() throws SGError;
-	
-	/** Commits the transaction. */
-	public native void commit() throws SGError;
-	
-	/** Rollbacks all changes made in the current transaction. */
-	public native void rollback() throws SGError;
-
-	/** Inserts a new triple.
-	 * @return an unique id that identifies this triple in the database
-	 */
-	public native long insertTriple(Expr subj, Expr pred, Expr obj) throws SGError;
-
-	//////////////////////////////////////////////////////////////////
-	// private stuff
-	private long ref;
-
-	private SG(long ref) {
-		this.ref  = ref;
-	}
-
-	static {
-		System.loadLibrary("jpgf");
-	}
-}
diff --git a/src/runtime/java/org/grammaticalframework/sg/SGError.java b/src/runtime/java/org/grammaticalframework/sg/SGError.java
deleted file mode 100644
index 8b03caab7..000000000
--- a/src/runtime/java/org/grammaticalframework/sg/SGError.java
+++ /dev/null
@@ -1,11 +0,0 @@
-package org.grammaticalframework.sg;
-
-/** This exception is thrown if an error occurs in the semantic graph.
- */
-public class SGError extends RuntimeException {
-	private static final long serialVersionUID = -6098784400143861939L;
-
-	public SGError(String message) {
-		super(message);
-	}
-}
diff --git a/src/runtime/java/org/grammaticalframework/sg/TripleResult.java b/src/runtime/java/org/grammaticalframework/sg/TripleResult.java
deleted file mode 100644
index 5570fd93b..000000000
--- a/src/runtime/java/org/grammaticalframework/sg/TripleResult.java
+++ /dev/null
@@ -1,53 +0,0 @@
-package org.grammaticalframework.sg;
-
-import java.io.Closeable;
-import org.grammaticalframework.pgf.Expr;
-
-/** This class is used to iterate over a list of triples.
- * To move to the next triple, call {@link TripleResult#hasNext}.
- * When you do not need the iterator anymore then call {@link TripleResult#close}
- * to release the allocated resources.
- */
-public class TripleResult implements Closeable {
-	public native boolean hasNext();
-	
-	/** Closes the iterator and releases the allocated resources. */
-	public native void close();
-
-	/** Each triple has an unique integer key. You can get the key for
-	 * the current triple by calling {@link TripleResult#getKey}.
-	 */
-	public long getKey() {
-		return key;
-	}
-
-	/** This is the first element of the current triple. */
-	public Expr getSubject() {
-		return subj;
-	}
-
-	/** This is the second element of the current triple. */
-	public Expr getPredicate() {
-		return pred;
-	}
-
-	/** This is the third element of the current triple. */
-	public Expr getObject() {
-		return obj;
-	}
-	
-	//////////////////////////////////////////////////////////////////
-	// private stuff
-	private long ref;
-	private long key;
-	private Expr subj;
-	private Expr pred;
-	private Expr obj;
-
-	private TripleResult(long ref, Expr subj, Expr pred, Expr obj) {
-		this.ref  = ref;
-		this.subj = subj;
-		this.pred = pred;
-		this.obj  = obj;
-	}
-}