X-Git-Url: http://git.megacz.com/?p=sbp.git;a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2FForest.java;h=e7c0be4394c23d4951fc03f03be26cb2b44a80b3;hp=abc5874b238c5d155257d3a5f6865f637e7722df;hb=5ea3b9182192a0fbb7a0bd86b919384ddaeff29a;hpb=d1d05695d453c1e2972cd5e9d3bee5d31ffcf842

diff --git a/src/edu/berkeley/sbp/Forest.java b/src/edu/berkeley/sbp/Forest.java
index abc5874..e7c0be4 100644
--- a/src/edu/berkeley/sbp/Forest.java
+++ b/src/edu/berkeley/sbp/Forest.java
@@ -7,12 +7,51 @@ import java.util.*;
 import java.lang.reflect.*;
 
 /** an efficient representation of a collection of trees (Tomita's shared packed parse forest) */
-public abstract class Forest<T> /*extends PrintableTree<Forest.MyBody<T>>*/ implements Visitable<Forest.Body<T>>, IntegerMappable {
+public abstract class Forest<T> /*extends PrintableTree<Forest.MyBody<T>>*/
+    implements Visitable<Forest.Body<T>>,
+               IntegerMappable,
+               GraphViz.ToGraphViz {
 
     private static int master_idx = 0;
     private final int idx = master_idx++;
     public int toInt() { return idx; }
 
+    public abstract void expand(TaskList tl, HashSet<Tree<T>> ht);
+    public abstract void gather(TaskList tl, HashSet<Tree<T>>[] ht, HashSet<Tree<T>> target);
+
+    public static class TaskList extends ArrayList<TaskList.Task> {
+        public interface Task {
+            public void perform();
+        }
+        public class ExpandTask implements Task {
+            private Forest f;
+            private HashSet hs;
+            public ExpandTask(Forest f, HashSet hs) { this.f = f; this.hs = hs; }
+            public void perform() { f.expand(TaskList.this, hs); }
+        }
+        public class GatherTask implements Task {
+            private Forest f;
+            private HashSet[] ht;
+            private HashSet hs;
+            public GatherTask(Forest f, HashSet<Tree<?>>[] ht, HashSet<Tree<?>> hs) { this.f = f; this.hs = hs; this.ht = ht;}
+            public void perform() { f.gather(TaskList.this, ht, hs); }
+        }
+        public void expand(Forest f, HashSet hs) {
+            add(new ExpandTask(f, hs));
+        }
+        public void gather(Forest f, HashSet[] ht, HashSet hs) {
+            add(new GatherTask(f, ht, hs));
+        }
+        public void run() {
+            while(true) {
+                if (isEmpty()) return;
+                Task task = get(size()-1);
+                remove(size()-1);
+                task.perform();
+            }
+        }
+    }
+
     /** assume that this forest contains exactly one tree and return it; otherwise throw an exception */
     public final Tree<T> expand1() throws Ambiguous, ParseFailed {
         try {
@@ -24,9 +63,11 @@ public abstract class Forest<T> /*extends PrintableTree<Forest.MyBody<T>>*/ impl
 
     /** expand this forest into a set of trees */
     public HashSet<Tree<T>> expand(boolean toss) {
-        //if (toss) scan();
-        final HashSetTreeConsumer<T> ret = new HashSetTreeConsumer<T>();
-        visit(new TreeMaker2<T>(toss, ret), null, null);
+        TaskList tl = new TaskList();
+        HashSet<Tree<T>> ret = new HashSet<Tree<T>>();
+        tl.expand(this, ret);
+        tl.run();
+
         if (toss && ret.size() > 1) throw new InnerAmbiguous(this);
         return ret;
     }
@@ -36,60 +77,93 @@ public abstract class Forest<T> /*extends PrintableTree<Forest.MyBody<T>>*/ impl
         public InnerAmbiguous(Forest<?> f) { this.f = f; }
     }
 
-    public static interface TreeConsumer<T> {
-        public void addTree(Tree<T> t);
-    }
-    public static class HashSetTreeConsumer<T> extends HashSet<Tree<T>> implements TreeConsumer<T> {
-        public void addTree(Tree<T> t) { super.add(t); }
-    }
-
-    static        <T> Forest<T> singleton(Input.Location loc, Position p) {
-        return create(loc, null, new Forest[] { }, false, true, p); }
-    static        <T> Forest<T> singleton(Input.Location loc, Forest<T> body, Position p) {
-        //return create(loc, null, new Forest[] { body },  false, true, p);
-        return body;
-    }
-    static        <T> Forest<T> leaf(Input.Location loc, T tag, Position p) { return create(loc, tag, null, false, false, p); }
-
-    public static <T> Forest<T> create(Input.Location loc, T tag, Forest<T>[] tokens, boolean unwrap, boolean singleton, Position p) {
-        return new MyBody<T>(loc, tag, tokens, unwrap, singleton, p);
+    static        <T> Forest<T> leaf(Input.Region loc, T tag) { return create(loc, tag, null, false); }
+    public static <T> Forest<T> create(Input.Region loc, T tag, Forest<T>[] tokens, boolean unwrap) {
+        return new MyBody<T>(loc, tag, tokens, unwrap);
     }
-
     // Body //////////////////////////////////////////////////////////////////////////////
 
-    protected static interface Body<T> {
-        void expand(int i, TreeMaker<T> h);
+    public /*protected*/ static interface Body<T> extends GraphViz.ToGraphViz {
+        void expand(int i, TreeBuilder<T> h);
     }
+    public abstract void edges(GraphViz.Node n);
+    public boolean ambiguous() { return false; }
+    public /*protected*/ static class MyBody<T> extends Forest<T> implements Body<T> /* extends PrintableTree<Forest<T>> implements */ {
 
-    protected static class MyBody<T> extends Forest<T> implements Body<T> /* extends PrintableTree<Forest<T>> implements */ {
+        public boolean isTransparent() { return false; }
+        public boolean isHidden() { return false; }
+        public GraphViz.Node toGraphViz(GraphViz gv) {
+            if (gv.hasNode(this)) return gv.createNode(this);
+            GraphViz.Node n = gv.createNode(this);
+            n.label = headToString()==null?"":headToString();
+            n.directed = true;
+            //n.comment = reduction==null?null:reduction+"";
+            edges(n);
+            return n;
+        }
+        boolean edges = false;
+        public void edges(GraphViz.Node n) {
+            if (edges) return;
+            edges = true;
+            for(int i=0; i<tokens.length; i++) {
+                if (i==tokens.length-1 && unwrap && !tokens[i].ambiguous()) {
+                    tokens[i].edges(n);
+                } else {
+                    n.edge(tokens[i], null);
+                }
+            }
+        }
 
         public <B,C> void visit(Invokable<Forest.Body<T>,B,C> ivbc, B b, C c) {
             ivbc.invoke(this, b, c);
         }
 
-        private final Input.Location    location;
+        private final Input.Region      location;
         private final T                 tag;
         private final Forest<T>[]       tokens;
         private final boolean           unwrap;
-        private final boolean           singleton;
-        private final Sequence.Position reduction;
 
-        private MyBody(Input.Location loc, T tag, Forest<T>[] tokens, boolean unwrap, boolean singleton, Position reduction) {
+        private MyBody(Input.Region loc, T tag, Forest<T>[] tokens, boolean unwrap) {
             this.location = loc;
             this.tag = tag;
             this.tokens = tokens==null ? emptyForestArray : new Forest[tokens.length];
             if (tokens != null) System.arraycopy(tokens, 0, this.tokens, 0, tokens.length);
             if (tokens != null) for(int i=0; i<tokens.length; i++) if (tokens[i]==null) throw new Error(i+"");
             this.unwrap = unwrap;
-            this.singleton = singleton;
-            this.reduction = reduction;
         }
-
-        public void expand(final int i, final TreeMaker<T> h) {
-            if (singleton) {
-                tokens[0].visit(h, null, i);
+        public void gather(TaskList tl, HashSet<Tree<T>>[] ht, HashSet<Tree<T>> target) {
+            gather(tl, ht, target, new Tree[ht.length], 0);
+        }
+        private void gather(TaskList tl, HashSet<Tree<T>>[] ht, HashSet<Tree<T>> target, Tree[] trees, int i) {
+            if (i==ht.length) {
+                target.add(new Tree<T>(location, tag, trees));
                 return;
             }
+            for(Tree<T> tree : ht[i]) {
+                if (unwrap && i==trees.length-1) {
+                    // I think this is wrong
+                    Tree[] trees2 = new Tree[trees.length - 1 + tree.numChildren()];
+                    System.arraycopy(trees, 0, trees2, 0, trees.length-1);
+                    for(int j=0; j<tree.numChildren(); j++)
+                        trees2[trees.length-1+j] = tree.child(j);
+                    target.add(new Tree<T>(location, tag, trees2));
+                } else {
+                    trees[i] = tree;
+                    gather(tl, ht, target, trees, i+1);
+                    trees[i] = null;
+                }
+            }
+        }
+        public void expand(TaskList tl, HashSet<Tree<T>> ht) {
+            HashSet<Tree<T>>[] children = new HashSet[tokens.length];
+            tl.gather(this, children, ht);
+            for(int i=0; i<children.length; i++) {
+                children[i] = new HashSet<Tree<T>>();
+                tl.expand(tokens[i], children[i]);
+            }
+        }
+
+        public void expand(final int i, final TreeBuilder<T> h) {
             if (i==0) h.start(tag, location);
 
             if (i==tokens.length) {
@@ -100,10 +174,10 @@ public abstract class Forest<T> /*extends PrintableTree<Forest.MyBody<T>>*/ impl
                     tokens[i].visit(h, null, 0);
 
             } else {
-                tokens[i].visit(new TreeMaker<T>(h.toss) {
-                    public void start(T head, Input.Location loc) { }
+                tokens[i].visit(new TreeBuilder<T>(h.toss) {
+                    public void start(T head, Input.Region loc) { }
                     public void addTree(Tree<T> t) { toks.add(t); }
-                    public void finish(T head, Input.Location loc) {
+                    public void finish(T head, Input.Region loc) {
                         int old = h.toks.size();
                         h.addTree(new Tree<T>(loc, head, toks.toArray(tree_hint)));
                         expand(i+1, h);
@@ -113,8 +187,8 @@ public abstract class Forest<T> /*extends PrintableTree<Forest.MyBody<T>>*/ impl
             }
         }
 
-        protected String  headToString()         { return null; }
-        protected String  headToJava()           { return null; }
+        protected String  headToString()         { return tag==null?null:tag.toString(); }
+        protected String  headToJava()           { return "null"; }
         protected String  left()                 { return "{"; }
         protected String  right()                { return "}"; }
         protected boolean ignoreSingleton()      { return false; }
@@ -129,6 +203,21 @@ public abstract class Forest<T> /*extends PrintableTree<Forest.MyBody<T>>*/ impl
      *  viewed, it becomes immutable
      */
     static class Ref<T> extends Forest<T> {
+        public void expand(TaskList tl, HashSet<Tree<T>> ht) {
+            for (Forest<T> f : hp) f.expand(tl, ht);
+        }
+        public void gather(TaskList tl, HashSet<Tree<T>>[] ht, HashSet<Tree<T>> target) {
+            throw new Error();
+        }
+        public HashSet<GSS.Phase.Node> parents = new HashSet<GSS.Phase.Node>();
+        public boolean contains(Forest f) {
+            return hp.contains(f);
+        }
+        public boolean ambiguous() {
+            if (hp.size()==0) return false;
+            if (hp.size()==1) return hp.iterator().next().ambiguous();
+            return true;
+        }
         private FastSet<Forest<T>> hp = new FastSet<Forest<T>>();
         public Ref() { }
         public int toInt() {
@@ -136,6 +225,24 @@ public abstract class Forest<T> /*extends PrintableTree<Forest.MyBody<T>>*/ impl
             return super.toInt();
         }
         public void merge(Forest p) { if (p!=this) hp.add(p, true); }
+
+        public boolean isTransparent() { return hp.size()==1; }
+        public boolean isHidden() { return hp.size()==0; }
+        public void edges(GraphViz.Node n) {
+            if (hp.size()==1) { hp.iterator().next().edges(n); return; }
+            for(Forest f : hp) f.edges(n);
+        }
+        public GraphViz.Node toGraphViz(GraphViz gv) {
+            //if (hp.size()==0) return null;
+            if (hp.size()==1) return hp.iterator().next().toGraphViz(gv);
+            if (gv.hasNode(this)) return gv.createNode(this);
+            GraphViz.Node n = gv.createNode(this);
+            n.label = "?";
+            n.color = "red";
+            for(Forest f : hp) n.edge(f, null);
+            return n;
+        }
+
         public <B,C> void visit(Invokable<Forest.Body<T>,B,C> ivbc, B b, C c) {
             if (hp==null) return;
             for(Forest<T> f : hp)
@@ -145,40 +252,15 @@ public abstract class Forest<T> /*extends PrintableTree<Forest.MyBody<T>>*/ impl
     }
 
     public abstract <B,C> void visit(Invokable<Forest.Body<T>,B,C> ivbc, B b, C c);
-    private static class TreeMaker2<T> extends TreeMaker<T> {
-        private TreeConsumer<T> tc;
-        public TreeMaker2(boolean toss, TreeConsumer<T> tc) { super(toss); this.tc = tc; }
-        public void finish(T head, Input.Location loc) { tc.addTree(new Tree<T>(loc, head, toks.toArray(tree_hint)));; }
-        public void start(T head, Input.Location loc) { }
-        public void addTree(Tree<T> t) { toks.add(t); }
-    }
-    private static abstract class TreeMaker<T> implements Invokable<Forest.Body<T>,Boolean,Integer>, TreeConsumer<T> {
-        public ArrayList<Tree<T>> toks = new ArrayList<Tree<T>>();
-        private boolean toss;
-        protected T head;
-        public TreeMaker(boolean toss) { this.toss = toss; }
-        public abstract void start(T head, Input.Location loc);
-        public abstract void finish(T head, Input.Location loc);
-        public abstract void addTree(Tree<T> t);
-        public void invoke(Forest.Body<T> bod, Boolean o, Integer i) {
-            if (i==null) {
-                ArrayList<Tree<T>> toks = this.toks;
-                this.toks = new ArrayList<Tree<T>>();
-                bod.expand(0, this);
-                this.toks = toks;
-            } else {
-                bod.expand(i, this);
-            }
-        }
-    }
 
     // Statics //////////////////////////////////////////////////////////////////////////////
 
     private static Tree[] tree_hint = new Tree[0];
+    private static String[] string_hint = new String[0];
     private static final Forest[] emptyForestArray = new Forest[0];
 
     protected String  headToString()    { return null; }
-    protected String  headToJava()      { return null; }
+    protected String  headToJava()      { return "null"; }
     protected String  left()            { return "<?"; }
     protected String  right()           { return "?>"; }
     protected boolean ignoreSingleton() { return true; }