InitHEADmain

1 files changed, 70 insertions, 0 deletions

diff --git a/Homework/cs5300/project-three/parser/Action.java b/Homework/cs5300/project-three/parser/Action.java
new file mode 100644
index 0000000..040daab
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+++ b/Homework/cs5300/project-three/parser/Action.java
@@ -0,0 +1,70 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package parser;
+
+/**
+ *
+ * @author edwajohn
+ */
+public class Action {
+
+  enum Act {
+    SHIFT, REDUCE, ACCEPT
+  };
+
+  private final Act act;
+  private final Integer state;
+  private final Rule rule;
+
+  static Action createShift(Integer state) {
+    return new Action(Act.SHIFT, state, null);
+  }
+
+  static Action createReduce(Rule rule) {
+    return new Action(Act.REDUCE, null, rule);
+  }
+
+  static Action createAccept() {
+    return new Action(Act.ACCEPT, null, null);
+  }
+
+  private Action(Act act, Integer state, Rule rule) {
+    this.act = act;
+    this.state = state;
+    this.rule = rule;
+  }
+
+  public boolean isShift() {
+    return act == Act.SHIFT;
+  }
+
+  public boolean isReduce() {
+    return act == Act.REDUCE;
+  }
+
+  public boolean isAccept() {
+    return act == Act.ACCEPT;
+  }
+
+  public Integer getState() {
+    return state;
+  }
+
+  public Rule getRule() {
+    return rule;
+  }
+
+  @Override
+  public String toString() {
+    if (isShift()) {
+      return "S" + state;
+    }
+    if (isReduce()) {
+      return "R" + rule.getName();
+    }
+    return "acc";
+  }
+}