net.sourceforge.pmd.lang.ecmascript.ast.ASTNumberLiteral Maven / Gradle / Ivy
/*
* BSD-style license; for more info see http://pmd.sourceforge.net/license.html
*/
package net.sourceforge.pmd.lang.ecmascript.ast;
import java.math.BigDecimal;
import org.mozilla.javascript.ast.NumberLiteral;
public final class ASTNumberLiteral extends AbstractEcmascriptNode {
ASTNumberLiteral(NumberLiteral numberLiteral) {
super(numberLiteral);
}
@Override
protected R acceptJsVisitor(EcmascriptVisitor visitor, P data) {
return visitor.visit(this, data);
}
public String getNormalizedImage() {
String image = getValue();
image = image.replaceAll("_", "");
image = normalizeHexIntegerLiteral(image);
image = normalizeBinaryLiteral(image);
image = normalizeOctalLiteral(image);
image = image.replace('e', 'E');
if (image.indexOf('.') == -1 && image.indexOf('E') == -1) {
image = image + ".0";
}
return image;
}
private String normalizeHexIntegerLiteral(String image) {
if (image.startsWith("0x") || image.startsWith("0X")) {
return String.valueOf(Integer.parseInt(image.substring(2), 16));
}
return image;
}
private String normalizeBinaryLiteral(String image) {
if (image.startsWith("0b") || image.startsWith("0B")) {
return String.valueOf(Integer.parseInt(image.substring(2), 2));
}
return image;
}
private String normalizeOctalLiteral(String image) {
if (image.startsWith("0o") || image.startsWith("0O")) {
return String.valueOf(Integer.parseInt(image.substring(2), 8));
}
return image;
}
public double getNumber() {
return node.getNumber();
}
public String getValue() {
return node.getValue();
}
/**
* Checks if this number literal cannot be represented exactly without loss as
* a JavaScript Number. The number is either too big or uses too many decimal places.
* @return {@code true} if the literal is inaccurate.
* @since 7.4.0
*/
public boolean isInaccurate() {
BigDecimal bigDecimal = new BigDecimal(getNormalizedImage());
BigDecimal converted = BigDecimal.valueOf(bigDecimal.doubleValue());
return bigDecimal.compareTo(converted) != 0;
}
}