1 files changed, 67 insertions, 0 deletions
diff --git a/container-search/src/main/java/com/yahoo/prelude/semantics/rule/ProductionList.java b/container-search/src/main/java/com/yahoo/prelude/semantics/rule/ProductionList.java
new file mode 100644
index 00000000000..3397a9ada1e
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+++ b/container-search/src/main/java/com/yahoo/prelude/semantics/rule/ProductionList.java
@@ -0,0 +1,67 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.prelude.semantics.rule;
+
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Set;
+
+import com.yahoo.prelude.semantics.engine.RuleEvaluation;
+
+/**
+ * A list of the productions of a rule
+ *
+ * @author <a href="mailto:bratseth@yahoo-inc.com">Jon S Bratseth</a>
+ */
+public class ProductionList {
+
+    private List<Production> productions =new java.util.ArrayList<>();
+
+    /** True to replace by the production, false to add it */
+    private boolean replacing=true;
+
+    public void addProduction(Production term) {
+        term.setReplacing(replacing);
+        term.setPosition(productions.size());
+        productions.add(term);
+    }
+
+    /** True to replace, false to add, default true */
+    void setReplacing(boolean replacing) {
+        for (Iterator<Production> i=productions.iterator(); i.hasNext(); ) {
+            Production production=i.next();
+            production.setReplacing(replacing);
+        }
+
+        this.replacing=replacing;
+    }
+
+    /** Returns an unmodifiable view of the productions in this */
+    public List<Production> productionList() { return Collections.unmodifiableList(productions); }
+
+    public int getTermCount() { return productions.size(); }
+
+    void addMatchReferences(Set<String> matchReferences) {
+        for (Iterator<Production> i=productions.iterator(); i.hasNext(); ) {
+            Production term=i.next();
+            term.addMatchReferences(matchReferences);
+        }
+    }
+
+    public void produce(RuleEvaluation e) {
+        for (int i=0; i<productions.size(); i++) {
+            productions.get(i).produce(e,i);
+        }
+    }
+
+    public String toString() {
+        StringBuilder buffer=new StringBuilder();
+        for (Iterator<Production> i=productions.iterator(); i.hasNext(); ) {
+            buffer.append(i.next().toString());
+            if (i.hasNext())
+                buffer.append(" ");
+        }
+        return buffer.toString();
+    }
+
+}