School Commit Init

2024-08-31 12:07:21 +03:00
commit 0b130ee18c
2801 changed files with 4720552 additions and 0 deletions
@@ -0,0 +1,60 @@
+package Models.Statements;
+
+import Exceptions.BaseException;
+import Models.Expressions.IExpression;
+import Models.Program.IDictionary;
+import Models.Program.IHeap;
+import Models.Program.ProgramState;
+import Models.Types.BooleanType;
+import Models.Types.IType;
+import Models.Values.BooleanValue;
+import Models.Values.IValue;
+
+
+public class IfStatement implements IStatement {
+    private IStatement thenStatement;
+    private IStatement elseStatement;
+    private IExpression condition;
+
+    public IfStatement(IExpression condition, IStatement thenStatement, IStatement elseStatement) {
+        this.condition = condition;
+        this.thenStatement = thenStatement;
+        this.elseStatement = elseStatement;
+    }
+
+    public String toString() {
+        return "(if(" + condition.toString() + ") then(" + thenStatement.toString() + ") else(" + elseStatement.toString() + "))";
+    }
+
+    public IStatement copy() {
+        return new IfStatement(condition.copy(), thenStatement.copy(), elseStatement.copy());
+    }
+
+    public ProgramState execute(ProgramState state) throws BaseException {
+        IDictionary<String, IValue> symbolTable = state.getSymbolTable();
+        IHeap heap = state.getHeap();
+        IValue conditionValue = condition.evaluate(symbolTable, heap);
+        if (conditionValue.getType().equals(new BooleanType())) {
+            boolean conditionBool = ((BooleanValue)conditionValue).getValue();
+            if (conditionBool) {
+                thenStatement.execute(state);
+            } else {
+                elseStatement.execute(state);
+            }
+        } else {
+            throw new BaseException("Condition is not a boolean!");
+        }
+        return null;
+    }
+
+    public IDictionary<String, IType> typeCheck(IDictionary<String, IType> typeTable) throws BaseException {
+        IType conditionType = condition.typeCheck(typeTable);
+        if (conditionType.equals(new BooleanType())) {
+            thenStatement.typeCheck(typeTable.copy());
+            elseStatement.typeCheck(typeTable.copy());
+            return typeTable;
+        } else {
+            throw new BaseException("Condition is not a boolean!");
+        }
+    }
+}