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/*
* Copyright (C) 2007-2010 Júlio Vilmar Gesser.
* Copyright (C) 2011, 2013-2023 The JavaParser Team.
*
* This file is part of JavaParser.
*
* JavaParser can be used either under the terms of
* a) the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* b) the terms of the Apache License
*
* You should have received a copy of both licenses in LICENCE.LGPL and
* LICENCE.APACHE. Please refer to those files for details.
*
* JavaParser is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*/
package com.github.javaparser.ast.expr;
import com.github.javaparser.TokenRange;
import com.github.javaparser.ast.AllFieldsConstructor;
import com.github.javaparser.ast.Generated;
import com.github.javaparser.ast.visitor.CloneVisitor;
import com.github.javaparser.ast.visitor.GenericVisitor;
import com.github.javaparser.ast.visitor.VoidVisitor;
import com.github.javaparser.metamodel.JavaParserMetaModel;
import com.github.javaparser.metamodel.LongLiteralExprMetaModel;
import java.math.BigInteger;
import java.util.Objects;
import java.util.Optional;
import java.util.function.Consumer;
import static com.github.javaparser.utils.Utils.hasUnaryMinusAsParent;
/**
* All ways to specify a long literal.
*
*
* - {@code 8934l}
* - {@code 0x01L}
* - {@code 022l}
* - {@code 0B10101010L}
* - {@code 99999999L}
*
*
* @author Julio Vilmar Gesser
*/
public class LongLiteralExpr extends LiteralStringValueExpr {
public static final String MAX_63_BIT_UNSIGNED_VALUE_AS_STRING = "9223372036854775808L";
public static final BigInteger MAX_63_BIT_UNSIGNED_VALUE_AS_BIG_INTEGER = new BigInteger("9223372036854775808");
public LongLiteralExpr() {
this(null, "0");
}
@AllFieldsConstructor
public LongLiteralExpr(final String value) {
this(null, value);
}
/**
* This constructor is used by the parser and is considered private.
*/
@Generated("com.github.javaparser.generator.core.node.MainConstructorGenerator")
public LongLiteralExpr(TokenRange tokenRange, String value) {
super(tokenRange, value);
customInitialization();
}
/**
* @deprecated This function is deprecated in favor of {@link #LongLiteralExpr(String)}. Please refer to the {@link
* #asNumber()} function for valid formats and how to construct literals holding negative values.
*/
@Deprecated
public LongLiteralExpr(final long value) {
this(null, String.valueOf(value));
}
@Override
@Generated("com.github.javaparser.generator.core.node.AcceptGenerator")
public R accept(final GenericVisitor v, final A arg) {
return v.visit(this, arg);
}
@Override
@Generated("com.github.javaparser.generator.core.node.AcceptGenerator")
public void accept(final VoidVisitor v, final A arg) {
v.visit(this, arg);
}
/**
* @return the literal value as an long while respecting different number representations
* @deprecated This function has issues with corner cases, such as 9223372036854775808L, so please use {@link
* LongLiteralExpr#asNumber()}. It will be made private or merged with {@link LongLiteralExpr#asNumber()} in future
* releases
*/
@Deprecated
public long asLong() {
String result = value.replaceAll("_", "");
char lastChar = result.charAt(result.length() - 1);
if (lastChar == 'l' || lastChar == 'L') {
result = result.substring(0, result.length() - 1);
}
if (result.startsWith("0x") || result.startsWith("0X")) {
return Long.parseUnsignedLong(result.substring(2), 16);
}
if (result.startsWith("0b") || result.startsWith("0B")) {
return Long.parseUnsignedLong(result.substring(2), 2);
}
if (result.length() > 1 && result.startsWith("0")) {
return Long.parseUnsignedLong(result.substring(1), 8);
}
return Long.parseLong(result);
}
/**
* This function returns a representation of the literal value as a number. This will return a long, except for the
* case when the literal has the value {@code 9223372036854775808L}. This special literal is only allowed in
* the expression {@code -9223372036854775808L} which represents Long.MIN_VALUE). However
* 9223372036854775808 (2^63) is out of range of long, which is -(2^63) to (2^63)-1 and thus a BigInteger must be
* returned.
*
* Note, that this function will NOT return a negative number if the literal was specified in decimal, since
* according to the language specification (chapter 3.10.1) an expression such as {@code -1L} is represented by
* a unary * expression with a minus operator and the literal {@code 1L}. It is however possible to represent
* negative * numbers in a literal directly, i.e. by using the binary or hexadecimal representation. For example
* {@code 0xffff_ffff_ffff_ffffL} represents the value -1L.
*
* @return the literal value as a number while respecting different number representations
*/
public Number asNumber() {
if (Objects.equals(value, MAX_63_BIT_UNSIGNED_VALUE_AS_STRING) && hasUnaryMinusAsParent(this)) {
return MAX_63_BIT_UNSIGNED_VALUE_AS_BIG_INTEGER;
}
return asLong();
}
/**
* @deprecated This function is deprecated in favor of {@link #setValue(String)}. Please refer to the {@link
* #asNumber()} function for valid formats and how to construct literals holding negative values.
*/
@Deprecated
public LongLiteralExpr setLong(long value) {
this.value = String.valueOf(value);
return this;
}
@Override
@Generated("com.github.javaparser.generator.core.node.CloneGenerator")
public LongLiteralExpr clone() {
return (LongLiteralExpr) accept(new CloneVisitor(), null);
}
@Override
@Generated("com.github.javaparser.generator.core.node.GetMetaModelGenerator")
public LongLiteralExprMetaModel getMetaModel() {
return JavaParserMetaModel.longLiteralExprMetaModel;
}
@Override
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public boolean isLongLiteralExpr() {
return true;
}
@Override
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public LongLiteralExpr asLongLiteralExpr() {
return this;
}
@Override
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public void ifLongLiteralExpr(Consumer action) {
action.accept(this);
}
@Override
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public Optional toLongLiteralExpr() {
return Optional.of(this);
}
}