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lugtylugty
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‎pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>siadem.com</groupId>
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<artifactId>InterpreterLTY</artifactId>
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<version>1.5-SNAPSHOT</version>
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<properties>
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<junit.version>4.12</junit.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>${junit.version}</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.2</version>
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</plugin>
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<plugin>
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<groupId>org.jfrog.buildinfo</groupId>
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<artifactId>artifactory-maven-plugin</artifactId>
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<version>2.6.1</version>
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<inherited>false</inherited>
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<executions>
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<execution>
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<id>build-info</id>
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<goals>
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<goal>publish</goal>
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</goals>
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<configuration>
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<deployProperties>
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<gradle>awesome</gradle>
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<review.team>qa</review.team>
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</deployProperties>
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<publisher>
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<contextUrl>http://192.168.1.120:8081/artifactory</contextUrl>
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<username>lugty</username>
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<password>centinela77</password>
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<repoKey>libs-release-local</repoKey>
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<snapshotRepoKey>libs-snapshot-local</snapshotRepoKey>
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</publisher>
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</configuration>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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</project>

‎src/main/java/InterpreterLTY/interpreter/Interpreter.java‎

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package InterpreterLTY.interpreter;
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import InterpreterLTY.interpreter.parser.*;
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import InterpreterLTY.interpreter.util.TokenTypes;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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/**
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* Created by lugty on 4/19/17.
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*/
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public class Interpreter extends NodeVisitor {
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private HashMap<String, Double> GLOBAL_SCOPE = new HashMap<String, Double>();
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private AST tree;
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public Interpreter(AST tree)throws Exception{
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this.tree = tree;
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}
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public Interpreter(AST tree, HashMap<String, Double> varTable)throws Exception{
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this.tree = tree;
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this.GLOBAL_SCOPE = varTable;
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}
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public Double visitBinOp(AST nodeAST){
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BinOp node = (BinOp)nodeAST;
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if (node.getOp().getType() == TokenTypes.PLUS){
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Double dd = (Double)this.visit(node.getLeft()) + (Double)this.visit(node.getRight());
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return dd;
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} else if (node.getOp().getType() == TokenTypes.MINUS)
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return (Double)this.visit(node.getLeft()) - (Double)this.visit(node.getRight());
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else if (node.getOp().getType() == TokenTypes.MUL)
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return (Double)this.visit(node.getLeft()) * (Double)this.visit(node.getRight());
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else if (node.getOp().getType() == TokenTypes.DIV)
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return (Double)this.visit(node.getLeft()) / (Double)this.visit(node.getRight());
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return 0.0;
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}
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public Double visitNum(AST nodeAST){
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Num node = (Num)nodeAST;
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Object valueObj = node.getValue();
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if(valueObj instanceof Integer){
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Integer vInt = (Integer)valueObj;
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return vInt.doubleValue();
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}else if(valueObj instanceof Double){
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Double vDouble = (Double) valueObj;
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return vDouble;
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}
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return (Double) node.getValue();
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}
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public Double visitUnaryOp(AST node){
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UnaryOp unaryOp = (UnaryOp) node;
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TokenTypes typeOp = unaryOp.getOp().getType();
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if(typeOp == TokenTypes.PLUS){
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return +(Double)this.visit(unaryOp.getExpr());
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}else if(typeOp == TokenTypes.MINUS){
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return -(Double)this.visit(unaryOp.getExpr());
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}
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return 0.0;
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}
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public List<Object> visitCompound(AST nodesAST){
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Compound nodes = (Compound) nodesAST;
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List<Object> responses = new ArrayList();
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for(AST node: nodes.getChildren()){
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Object res = this.visit(node);
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responses.add(res);
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}
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return responses;
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}
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public void visitAssign(AST node){
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Assign nodeVar = (Assign) node;
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String varName = nodeVar.getLeft().getValue();
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Object value = this.visit(nodeVar.getRight());
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this.GLOBAL_SCOPE.put(varName, (Double)value);
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}
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public Object visitVar(AST node) throws Exception{
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Var varNode = (Var) node;
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String varName = varNode.getValue();
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Object nodeVarFound = this.GLOBAL_SCOPE.get(varName);
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if(nodeVarFound == null)
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throw new Exception();
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else
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return nodeVarFound;
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}
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public Object visitIfStatement(AST node) throws Exception{
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IfStatement ifNode = (IfStatement) node;
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Boolean status = (Boolean) this.visit(ifNode.getCondition());
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if(status){
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Object rest = this.visit(ifNode.getTrueStatement());
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return rest;
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}else{
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Object rest = this.visit(ifNode.getFalseStatement());
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return rest;
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}
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}
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public Boolean visitConditionalOp(AST node) throws Exception{
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ConditionalOp condNode = (ConditionalOp) node;
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Double valLeft = (Double) this.visit(condNode.getLeft());
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Double valRight = (Double) this.visit(condNode.getRight());
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if(condNode.getOp().getType() ==TokenTypes.EQUAL){
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if(valLeft != null && valRight != null){
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if(valLeft.doubleValue() == valRight.doubleValue()) return true; else return false;
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}else{
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if(valLeft == valRight) return true; else return false;
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}
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}else if(condNode.getOp().getType() ==TokenTypes.NOTEQUAL){
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if(valLeft != valRight) return true; else return false;
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}else if(condNode.getOp().getType() ==TokenTypes.GREATER){
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if(valLeft > valRight) return true; else return false;
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}else if(condNode.getOp().getType() ==TokenTypes.GREATEREQ){
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if(valLeft >= valRight) return true; else return false;
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}else if(condNode.getOp().getType() ==TokenTypes.LESS){
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if(valLeft < valRight) return true; else return false;
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}else if(condNode.getOp().getType() ==TokenTypes.LESSEQ){
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if(valLeft <= valRight) return true; else return false;
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}
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return false;
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}
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public void visitNoOp(AST node){}
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public Object interprete() throws Exception{
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if(this.tree == null)
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return "";
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return this.visit(tree);
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}
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}

‎src/main/java/InterpreterLTY/interpreter/NodeVisitor.java‎

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package InterpreterLTY.interpreter;
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import InterpreterLTY.interpreter.parser.AST;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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/**
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* Created by lugty on 4/20/17.
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*/
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public class NodeVisitor {
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public Object visit(AST node){
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try {
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String name = "visit"+node.getClass().getSimpleName();
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Class ctl = this.getClass();
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Method method = this.getClass().getMethod(name, AST.class);
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Object rst = method.invoke(this, node);
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return rst;
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} catch (NoSuchMethodException e) {
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e.printStackTrace();
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} catch (IllegalAccessException e) {
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e.printStackTrace();
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} catch (InvocationTargetException e) {
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e.printStackTrace();
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}
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return null;
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}
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public void genericVisit(AST node) throws Exception{
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throw new Exception("No visit" + node.getClass().getName() + "method");
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}
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}

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