implement ll1-nonrecursive-descent-parser

src/main/java/parser/LL1ParsingTable.java

@@ -0,0 +1,52 @@
+package parser;
+
+import java.util.AbstractMap.SimpleEntry;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+public class LL1ParsingTable implements ILL1ParsingTable {
+
+    private final String start;
+    private final List<String> terminals;
+    private final List<String> nonterminals;
+    private final String epsilon;
+    private final Map<Entry<String, String>, ? extends List<String>> parsetable;
+
+    public LL1ParsingTable(List<String> nonterminals,
+                           List<String> terminals,
+                           String start,
+                           String epsilon,
+                           Map<Entry<String, String>, ? extends List<String>> parsetable) {
+        this.start = start;
+        this.terminals = terminals;
+        this.nonterminals = nonterminals;
+        this.epsilon = epsilon;
+        this.parsetable = parsetable;
+    }
+
+    @Override
+    public List<String> get(String nonterminal, String terminal) {
+        return this.parsetable.get(new SimpleEntry<>(nonterminal, terminal));
+    }
+
+    @Override
+    public String getStartSymbol() {
+        return this.start;
+    }
+
+    @Override
+    public List<String> getNonterminals() {
+        return this.nonterminals;
+    }
+
+    @Override
+    public List<String> getTerminals() {
+        return this.terminals;
+    }
+
+    @Override
+    public String getEpsilon() {
+        return this.epsilon;
+    }
+}