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 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
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package com.oracle.graal.python.nodes.literal;

import com.oracle.graal.python.builtins.modules.BuiltinFunctions;
import com.oracle.graal.python.builtins.modules.BuiltinFunctionsFactory;
import com.oracle.graal.python.lib.PyObjectAsciiNode;
import com.oracle.graal.python.lib.PyObjectReprAsJavaStringNode;
import com.oracle.graal.python.lib.PyObjectStrAsJavaStringNode;
import com.oracle.graal.python.nodes.expression.ExpressionNode;
import com.oracle.graal.python.parser.sst.StringLiteralSSTNode;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.frame.VirtualFrame;

public class FormatStringExpressionNode extends LiteralNode {

    /**
     * This is the expression itself
     */
    @Child private ExpressionNode expression;
    /**
     * In current implementation can be the specifier defined via FormatStringLiteralNode. It can be
     * null, if there is now specifier.
     */
    @Child private ExpressionNode specifier;

    private final StringLiteralSSTNode.FormatStringConversionType conversionType;

    @Child private BuiltinFunctions.FormatNode formatNode;
    @Child private PyObjectStrAsJavaStringNode strNode;
    @Child private PyObjectReprAsJavaStringNode reprNode;
    @Child private PyObjectAsciiNode asciiNode;

    public FormatStringExpressionNode(ExpressionNode expression, ExpressionNode specifier, StringLiteralSSTNode.FormatStringConversionType conversionType) {
        this.expression = expression;
        this.specifier = specifier;
        this.conversionType = conversionType;
    }

    @Override
    public Object execute(VirtualFrame frame) {
        Object result = expression.execute(frame);
        if (null != conversionType) {
            switch (conversionType) {
                case STR_CONVERTION:
                    result = getStrNode().execute(frame, result);
                    break;
                case REPR_CONVERSION:
                    result = getReprNode().execute(frame, result);
                    break;
                case ASCII_CONVERSION:
                    result = getAsciiNode().execute(frame, result);
                    break;
                default:
                    break;
            }
        }
        Object specifierObject = specifier == null ? "" : specifier.execute(frame);
        result = getFormatNode().execute(frame, result, specifierObject);
        return result;
    }

    private PyObjectAsciiNode getAsciiNode() {
        if (asciiNode == null) {
            CompilerDirectives.transferToInterpreterAndInvalidate();
            asciiNode = insert(PyObjectAsciiNode.create());
        }
        return asciiNode;
    }

    private BuiltinFunctions.FormatNode getFormatNode() {
        if (formatNode == null) {
            CompilerDirectives.transferToInterpreterAndInvalidate();
            formatNode = insert(BuiltinFunctionsFactory.FormatNodeFactory.create());
        }
        return formatNode;
    }

    private PyObjectStrAsJavaStringNode getStrNode() {
        if (strNode == null) {
            CompilerDirectives.transferToInterpreterAndInvalidate();
            strNode = insert(PyObjectStrAsJavaStringNode.create());
        }
        return strNode;
    }

    private PyObjectReprAsJavaStringNode getReprNode() {
        if (reprNode == null) {
            CompilerDirectives.transferToInterpreterAndInvalidate();
            reprNode = insert(PyObjectReprAsJavaStringNode.create());
        }
        return reprNode;
    }

}
