ExpressionVisitorWrapper.java

package expvisitors;
// Wrapper of JSQL Parser
/**
 * 
 * @authors 
 * Saarthak Chandra
 * Shweta Srivastava
 * Vikas P Nelamangala
 *
 *  
 */
import error.SQLCustomErrorHandler;
import net.sf.jsqlparser.expression.AllComparisonExpression;
import net.sf.jsqlparser.expression.AnyComparisonExpression;
import net.sf.jsqlparser.expression.CaseExpression;
import net.sf.jsqlparser.expression.DateValue;
import net.sf.jsqlparser.expression.DoubleValue;
import net.sf.jsqlparser.expression.ExpressionVisitor;
import net.sf.jsqlparser.expression.Function;
import net.sf.jsqlparser.expression.InverseExpression;
import net.sf.jsqlparser.expression.JdbcParameter;
import net.sf.jsqlparser.expression.LongValue;
import net.sf.jsqlparser.expression.NullValue;
import net.sf.jsqlparser.expression.Parenthesis;
import net.sf.jsqlparser.expression.StringValue;
import net.sf.jsqlparser.expression.TimeValue;
import net.sf.jsqlparser.expression.TimestampValue;
import net.sf.jsqlparser.expression.WhenClause;
import net.sf.jsqlparser.expression.operators.arithmetic.Addition;
import net.sf.jsqlparser.expression.operators.arithmetic.BitwiseAnd;
import net.sf.jsqlparser.expression.operators.arithmetic.BitwiseOr;
import net.sf.jsqlparser.expression.operators.arithmetic.BitwiseXor;
import net.sf.jsqlparser.expression.operators.arithmetic.Concat;
import net.sf.jsqlparser.expression.operators.arithmetic.Division;
import net.sf.jsqlparser.expression.operators.arithmetic.Multiplication;
import net.sf.jsqlparser.expression.operators.arithmetic.Subtraction;
import net.sf.jsqlparser.expression.operators.conditional.AndExpression;
import net.sf.jsqlparser.expression.operators.conditional.OrExpression;
import net.sf.jsqlparser.expression.operators.relational.Between;
import net.sf.jsqlparser.expression.operators.relational.EqualsTo;
import net.sf.jsqlparser.expression.operators.relational.ExistsExpression;
import net.sf.jsqlparser.expression.operators.relational.GreaterThan;
import net.sf.jsqlparser.expression.operators.relational.GreaterThanEquals;
import net.sf.jsqlparser.expression.operators.relational.InExpression;
import net.sf.jsqlparser.expression.operators.relational.IsNullExpression;
import net.sf.jsqlparser.expression.operators.relational.LikeExpression;
import net.sf.jsqlparser.expression.operators.relational.Matches;
import net.sf.jsqlparser.expression.operators.relational.MinorThan;
import net.sf.jsqlparser.expression.operators.relational.MinorThanEquals;
import net.sf.jsqlparser.expression.operators.relational.NotEqualsTo;
import net.sf.jsqlparser.schema.Column;
import net.sf.jsqlparser.statement.select.SubSelect;

public class ExpressionVisitorWrapper implements ExpressionVisitor{

	long expressionValue=0;
	boolean expressionResult = false;
	
	public boolean getExpressionEvaluationResult(){
		return expressionResult;
	}
	
	@Override
	public void visit(NullValue arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(Function arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(InverseExpression arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(JdbcParameter arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(DoubleValue arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void visit(LongValue arg0) {
		expressionValue = arg0.getValue();
		
	}

	@Override
	public void visit(DateValue arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(TimeValue arg0) {
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(TimestampValue arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(Parenthesis arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(StringValue arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(Addition arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(Division arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(Multiplication arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(Subtraction arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(AndExpression arg0) {
		// TODO Auto-generated method stub
		arg0.getLeftExpression().accept(this);
		boolean leftChild = expressionResult;
		arg0.getRightExpression().accept(this);
		boolean rightChild = expressionResult;
		expressionResult = leftChild && rightChild;
		
	}

	@Override
	public void visit(OrExpression arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void visit(Between arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(EqualsTo arg0) {
		// TODO Auto-generated method stub
		arg0.getLeftExpression().accept(this);
		double leftChild = expressionValue;
		arg0.getRightExpression().accept(this);
		double rightChild = expressionValue;
		if(leftChild == rightChild)
			expressionResult=true;
		else
			expressionResult = false;
		
	}

	@Override
	public void visit(GreaterThan arg0) {
		// TODO Auto-generated method stub
		arg0.getLeftExpression().accept(this);
		double leftChild = expressionValue;
		arg0.getRightExpression().accept(this);
		double rightChild = expressionValue;
		if(leftChild > rightChild)
			expressionResult=true;
		else
			expressionResult = false;
	}

	@Override
	public void visit(GreaterThanEquals arg0) {
		// TODO Auto-generated method stub
		arg0.getLeftExpression().accept(this);
		double leftChild = expressionValue;
		arg0.getRightExpression().accept(this);
		double rightChild = expressionValue;
		if(leftChild >= rightChild)
			expressionResult=true;
		else
			expressionResult = false;
	}

	@Override
	public void visit(InExpression arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(IsNullExpression arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(LikeExpression arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(MinorThan arg0) {
		// TODO Auto-generated method stub
		arg0.getLeftExpression().accept(this);
		double leftChild = expressionValue;
		arg0.getRightExpression().accept(this);
		double rightChild = expressionValue;
		if(leftChild < rightChild)
			expressionResult=true;
		else
			expressionResult = false;
		
	}

	@Override
	public void visit(MinorThanEquals arg0) {
		// TODO Auto-generated method stub
		arg0.getLeftExpression().accept(this);
		double leftChild = expressionValue;
		arg0.getRightExpression().accept(this);
		double rightChild = expressionValue;
		if(leftChild <= rightChild)
			expressionResult=true;
		else
			expressionResult = false;
		
	}

	@Override
	public void visit(NotEqualsTo arg0) {
		// TODO Auto-generated method stub
		arg0.getLeftExpression().accept(this);
		double leftChild = expressionValue;
		arg0.getRightExpression().accept(this);
		double rightChild = expressionValue;
		if(leftChild != rightChild)
			expressionResult=true;
		else
			expressionResult = false;
		
		
	}

	@Override
	public void visit(Column arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(SubSelect arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(CaseExpression arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(WhenClause arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(ExistsExpression arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(AllComparisonExpression arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(AnyComparisonExpression arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(Concat arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(Matches arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(BitwiseAnd arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(BitwiseOr arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}

	@Override
	public void visit(BitwiseXor arg0) {
		// TODO Auto-generated method stub
		throw new UnsupportedOperationException("Unsupported Operation");
	}
}