com.ibm.bi.dml.parser.python.PydmlSyntacticValidatorHelper.java Source code

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Here is the source code for com.ibm.bi.dml.parser.python.PydmlSyntacticValidatorHelper.java

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/**
 * (C) Copyright IBM Corp. 2010, 2015
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
*/

package com.ibm.bi.dml.parser.python;

import java.util.ArrayList;
import java.util.List;

import org.antlr.v4.runtime.Token;

import com.ibm.bi.dml.parser.DMLProgram;
import com.ibm.bi.dml.parser.python.PydmlParser.FunctionCallAssignmentStatementContext;
import com.ibm.bi.dml.parser.python.PydmlParser.ParameterizedExpressionContext;
import com.ibm.bi.dml.parser.python.PydmlSyntacticErrorListener.CustomDmlErrorListener;

public class PydmlSyntacticValidatorHelper {

    private CustomDmlErrorListener _errorListener = null;

    public PydmlSyntacticValidatorHelper(CustomDmlErrorListener errorListener) {
        this._errorListener = errorListener;
    }

    public void notifyErrorListeners(String message, int line, int charPositionInLine) {
        this._errorListener.validationError(line, charPositionInLine, message);
    }

    public void notifyErrorListeners(String message, Token op) {
        this._errorListener.validationError(op.getLine(), op.getCharPositionInLine(), message);
    }

    public String getCurrentFileName() {
        return _errorListener.peekFileName();
    }

    // Returns list of two elements <namespace, function names>, else null
    public ArrayList<String> getQualifiedNames(String fullyQualifiedFunctionName) {
        String[] fnNames = fullyQualifiedFunctionName.split("\\."); // instead of ::
        String functionName = "";
        String namespace = "";
        if (fnNames.length == 1) {
            namespace = DMLProgram.DEFAULT_NAMESPACE;
            functionName = fnNames[0].trim();
        } else if (fnNames.length == 2) {
            namespace = fnNames[0].trim();
            functionName = fnNames[1].trim();
        } else
            return null;

        ArrayList<String> retVal = new ArrayList<String>();
        retVal.add(namespace);
        retVal.add(functionName);
        return retVal;
    }

    //   public static void setInfoForArithmeticOp(com.ibm.bi.dml.parser.Expression current, 
    //         com.ibm.bi.dml.parser.Expression left, 
    //         com.ibm.bi.dml.parser.Expression right, String opStr) {
    //      try {
    //         // PLUS, MINUS, MULT, DIV, MODULUS, INTDIV, MATMULT, POW, INVALID
    //         com.ibm.bi.dml.parser.Expression.BinaryOp bop = com.ibm.bi.dml.parser.Expression.getBinaryOp(opStr);
    //         current = new com.ibm.bi.dml.parser.BinaryExpression(bop);
    //         ((com.ibm.bi.dml.parser.BinaryExpression)current).setLeft(left);
    //         ((com.ibm.bi.dml.parser.BinaryExpression)current).setRight(right);
    //         ((com.ibm.bi.dml.parser.BinaryExpression)current).setFilename(DmlSyntacticErrorListener.currentFileName.peek());
    //      }
    //      catch(Exception e) {
    //         System.out.println("In setInfoForArithmeticOp>>");
    //         e.printStackTrace();
    //      }
    //   }

    //   public static void setInfoForBooleanOp(com.ibm.bi.dml.parser.Expression current, 
    //         com.ibm.bi.dml.parser.Expression left, 
    //         com.ibm.bi.dml.parser.Expression right, String opStr) {
    //      com.ibm.bi.dml.parser.Expression.BooleanOp bop = com.ibm.bi.dml.parser.Expression.getBooleanOp(opStr);
    //      current = new com.ibm.bi.dml.parser.BooleanExpression(bop);
    //      ((com.ibm.bi.dml.parser.BooleanExpression)current).setLeft(left);
    //      ((com.ibm.bi.dml.parser.BooleanExpression)current).setRight(right);
    //      ((com.ibm.bi.dml.parser.BooleanExpression)current).setFilename(DmlSyntacticErrorListener.currentFileName.peek());
    //   }

    public boolean validateBuiltinFunctions(FunctionCallAssignmentStatementContext ctx) {
        String functionName = ctx.name.getText().replaceAll(" ", "").trim();
        if (functionName.compareTo("write") == 0
                || functionName.compareTo(DMLProgram.DEFAULT_NAMESPACE + ".write") == 0) {
            return validateBuiltinWriteFunction(ctx);
        }
        return true;
    }

    private boolean validateBuiltinWriteFunction(FunctionCallAssignmentStatementContext ctx) {

        return true;
    }

    public ArrayList<com.ibm.bi.dml.parser.ParameterExpression> getParameterExpressionList(
            List<ParameterizedExpressionContext> paramExprs) {
        ArrayList<com.ibm.bi.dml.parser.ParameterExpression> retVal = new ArrayList<com.ibm.bi.dml.parser.ParameterExpression>();
        for (ParameterizedExpressionContext ctx : paramExprs) {
            String paramName = null;
            if (ctx.paramName != null && ctx.paramName.getText() != null && !ctx.paramName.getText().isEmpty()) {
                paramName = ctx.paramName.getText();
            }
            com.ibm.bi.dml.parser.ParameterExpression myArg = new com.ibm.bi.dml.parser.ParameterExpression(
                    paramName, ctx.paramVal.info.expr);
            retVal.add(myArg);
        }
        return retVal;
    }
}