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/*
* Copyright (C) 2015-2019 The Project Lombok Authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package lombok.javac.handlers.singulars;
import static lombok.javac.Javac.*;
import static lombok.javac.handlers.JavacHandlerUtil.*;
import com.sun.tools.javac.tree.JCTree.JCCase;
import com.sun.tools.javac.tree.JCTree.JCExpression;
import com.sun.tools.javac.tree.JCTree.JCStatement;
import com.sun.tools.javac.util.List;
import com.sun.tools.javac.util.ListBuffer;
import com.sun.tools.javac.util.Name;
import lombok.javac.JavacNode;
import lombok.javac.JavacTreeMaker;
import lombok.javac.handlers.JavacSingularsRecipes.JavacSingularizer;
import lombok.javac.handlers.JavacSingularsRecipes.SingularData;
abstract class JavacJavaUtilSingularizer extends JavacSingularizer {
protected List<JCStatement> createJavaUtilSetMapInitialCapacitySwitchStatements(JavacTreeMaker maker, SingularData data, JavacNode builderType, boolean mapMode, String emptyCollectionMethod, String singletonCollectionMethod, String targetType, JavacNode source, String builderVariable) {
List<JCExpression> jceBlank = List.nil();
ListBuffer<JCCase> cases = new ListBuffer<JCCase>();
if (emptyCollectionMethod != null) { // case 0: (empty); break;
JCStatement assignStat; {
// pluralName = java.util.Collections.emptyCollectionMethod();
JCExpression invoke = maker.Apply(jceBlank, chainDots(builderType, "java", "util", "Collections", emptyCollectionMethod), jceBlank);
assignStat = maker.Exec(maker.Assign(maker.Ident(data.getPluralName()), invoke));
}
JCStatement breakStat = maker.Break(null);
JCCase emptyCase = maker.Case(maker.Literal(CTC_INT, 0), List.of(assignStat, breakStat));
cases.append(emptyCase);
}
if (singletonCollectionMethod != null) { // case 1: (singleton); break;
JCStatement assignStat; {
// !mapMode: pluralName = java.util.Collections.singletonCollectionMethod(this.pluralName.get(0));
// mapMode: pluralName = java.util.Collections.singletonCollectionMethod(this.pluralName$key.get(0), this.pluralName$value.get(0));
JCExpression zeroLiteral = maker.Literal(CTC_INT, 0);
JCExpression arg = maker.Apply(jceBlank, chainDots(builderType, builderVariable, data.getPluralName() + (mapMode ? "$key" : ""), "get"), List.of(zeroLiteral));
List<JCExpression> args;
if (mapMode) {
JCExpression zeroLiteralClone = maker.Literal(CTC_INT, 0);
JCExpression arg2 = maker.Apply(jceBlank, chainDots(builderType, builderVariable, data.getPluralName() + (mapMode ? "$value" : ""), "get"), List.of(zeroLiteralClone));
args = List.of(arg, arg2);
} else {
args = List.of(arg);
}
JCExpression invoke = maker.Apply(jceBlank, chainDots(builderType, "java", "util", "Collections", singletonCollectionMethod), args);
assignStat = maker.Exec(maker.Assign(maker.Ident(data.getPluralName()), invoke));
}
JCStatement breakStat = maker.Break(null);
JCCase singletonCase = maker.Case(maker.Literal(CTC_INT, 1), List.of(assignStat, breakStat));
cases.append(singletonCase);
}
{ // default:
List<JCStatement> statements = createJavaUtilSimpleCreationAndFillStatements(maker, data, builderType, mapMode, false, true, emptyCollectionMethod == null, targetType, source, builderVariable);
JCCase defaultCase = maker.Case(null, statements);
cases.append(defaultCase);
}
JCStatement switchStat = maker.Switch(getSize(maker, builderType, mapMode ? builderType.toName(data.getPluralName() + "$key") : data.getPluralName(), true, false, builderVariable), cases.toList());
JCExpression localShadowerType = chainDotsString(builderType, data.getTargetFqn());
localShadowerType = addTypeArgs(mapMode ? 2 : 1, false, builderType, localShadowerType, data.getTypeArgs(), source);
JCStatement varDefStat = maker.VarDef(maker.Modifiers(0L), data.getPluralName(), localShadowerType, null);
return List.of(varDefStat, switchStat);
}
protected JCStatement createConstructBuilderVarIfNeeded(JavacTreeMaker maker, SingularData data, JavacNode builderType, boolean mapMode, JavacNode source) {
List<JCExpression> jceBlank = List.nil();
Name v1Name = mapMode ? builderType.toName(data.getPluralName() + "$key") : data.getPluralName();
Name v2Name = mapMode ? builderType.toName(data.getPluralName() + "$value") : null;
JCExpression thisDotField = maker.Select(maker.Ident(builderType.toName("this")), v1Name);
JCExpression cond = maker.Binary(CTC_EQUAL, thisDotField, maker.Literal(CTC_BOT, null));
thisDotField = maker.Select(maker.Ident(builderType.toName("this")), v1Name);
JCExpression v1Type = chainDots(builderType, "java", "util", "ArrayList");
v1Type = addTypeArgs(1, false, builderType, v1Type, data.getTypeArgs(), source);
JCExpression constructArrayList = maker.NewClass(null, jceBlank, v1Type, jceBlank, null);
JCStatement initV1 = maker.Exec(maker.Assign(thisDotField, constructArrayList));
JCStatement thenPart;
if (mapMode) {
thisDotField = maker.Select(maker.Ident(builderType.toName("this")), v2Name);
JCExpression v2Type = chainDots(builderType, "java", "util", "ArrayList");
List<JCExpression> tArgs = data.getTypeArgs();
if (tArgs != null && tArgs.tail != null) tArgs = tArgs.tail;
else tArgs = List.nil();
v2Type = addTypeArgs(1, false, builderType, v2Type, tArgs, source);
constructArrayList = maker.NewClass(null, jceBlank, v2Type, jceBlank, null);
JCStatement initV2 = maker.Exec(maker.Assign(thisDotField, constructArrayList));
thenPart = maker.Block(0, List.of(initV1, initV2));
} else {
thenPart = initV1;
}
return maker.If(cond, thenPart, null);
}
protected List<JCStatement> createJavaUtilSimpleCreationAndFillStatements(JavacTreeMaker maker, SingularData data, JavacNode builderType, boolean mapMode, boolean defineVar, boolean addInitialCapacityArg, boolean nullGuard, String targetType, JavacNode source, String builderVariable) {
List<JCExpression> jceBlank = List.nil();
Name thisName = builderType.toName(builderVariable);
JCStatement createStat; {
// pluralName = new java.util.TargetType(initialCap);
List<JCExpression> constructorArgs = List.nil();
if (addInitialCapacityArg) {
Name varName = mapMode ? builderType.toName(data.getPluralName() + "$key") : data.getPluralName();
// this.varName.size() < MAX_POWER_OF_2 ? 1 + this.varName.size() + (this.varName.size() - 3) / 3 : Integer.MAX_VALUE;
// lessThanCutOff = this.varName.size() < MAX_POWER_OF_2
JCExpression lessThanCutoff = maker.Binary(CTC_LESS_THAN, getSize(maker, builderType, varName, nullGuard, true, builderVariable), maker.Literal(CTC_INT, 0x40000000));
JCExpression integerMaxValue = genJavaLangTypeRef(builderType, "Integer", "MAX_VALUE");
JCExpression sizeFormulaLeft = maker.Binary(CTC_PLUS, maker.Literal(CTC_INT, 1), getSize(maker, builderType, varName, nullGuard, true, builderVariable));
JCExpression sizeFormulaRightLeft = maker.Parens(maker.Binary(CTC_MINUS, getSize(maker, builderType, varName, nullGuard, true, builderVariable), maker.Literal(CTC_INT, 3)));
JCExpression sizeFormulaRight = maker.Binary(CTC_DIV, sizeFormulaRightLeft, maker.Literal(CTC_INT, 3));
JCExpression sizeFormula = maker.Binary(CTC_PLUS, sizeFormulaLeft, sizeFormulaRight);
constructorArgs = List.<JCExpression>of(maker.Conditional(lessThanCutoff, sizeFormula, integerMaxValue));
}
JCExpression targetTypeExpr = chainDots(builderType, "java", "util", targetType);
targetTypeExpr = addTypeArgs(mapMode ? 2 : 1, false, builderType, targetTypeExpr, data.getTypeArgs(), source);
JCExpression constructorCall = maker.NewClass(null, jceBlank, targetTypeExpr, constructorArgs, null);
if (defineVar) {
JCExpression localShadowerType = chainDotsString(builderType, data.getTargetFqn());
localShadowerType = addTypeArgs(mapMode ? 2 : 1, false, builderType, localShadowerType, data.getTypeArgs(), source);
createStat = maker.VarDef(maker.Modifiers(0L), data.getPluralName(), localShadowerType, constructorCall);
} else {
createStat = maker.Exec(maker.Assign(maker.Ident(data.getPluralName()), constructorCall));
}
}
JCStatement fillStat; {
if (mapMode) {
// for (int $i = 0; $i < this.pluralname$key.size(); i++) pluralname.put(this.pluralname$key.get($i), this.pluralname$value.get($i));
Name ivar = builderType.toName("$i");
Name keyVarName = builderType.toName(data.getPluralName() + "$key");
JCExpression pluralnameDotPut = maker.Select(maker.Ident(data.getPluralName()), builderType.toName("put"));
JCExpression arg1 = maker.Apply(jceBlank, chainDots(builderType, builderVariable, data.getPluralName() + "$key", "get"), List.<JCExpression>of(maker.Ident(ivar)));
JCExpression arg2 = maker.Apply(jceBlank, chainDots(builderType, builderVariable, data.getPluralName() + "$value", "get"), List.<JCExpression>of(maker.Ident(ivar)));
// [jdk9] We add an unneccessary (V) cast here. Not doing so gives an error in javac (build 9-ea+156-jigsaw-nightly-h6072-20170212):
// error: method put in interface Map<K#2,V#2> cannot be applied to given types;
arg2 = maker.TypeCast(createTypeArgs(2, false, builderType, data.getTypeArgs(), source).get(1), arg2);
JCStatement putStatement = maker.Exec(maker.Apply(jceBlank, pluralnameDotPut, List.of(arg1, arg2)));
JCStatement forInit = maker.VarDef(maker.Modifiers(0L), ivar, maker.TypeIdent(CTC_INT), maker.Literal(CTC_INT, 0));
JCExpression checkExpr = maker.Binary(CTC_LESS_THAN, maker.Ident(ivar), getSize(maker, builderType, keyVarName, nullGuard, true, builderVariable));
JCExpression incrementExpr = maker.Unary(CTC_POSTINC, maker.Ident(ivar));
fillStat = maker.ForLoop(List.of(forInit), checkExpr, List.of(maker.Exec(incrementExpr)), putStatement);
} else {
// pluralname.addAll(this.pluralname);
JCExpression thisDotPluralName = maker.Select(maker.Ident(thisName), data.getPluralName());
fillStat = maker.Exec(maker.Apply(jceBlank, maker.Select(maker.Ident(data.getPluralName()), builderType.toName("addAll")), List.of(thisDotPluralName)));
}
if (nullGuard) {
JCExpression thisDotField = maker.Select(maker.Ident(thisName), mapMode ? builderType.toName(data.getPluralName() + "$key") : data.getPluralName());
JCExpression nullCheck = maker.Binary(CTC_NOT_EQUAL, thisDotField, maker.Literal(CTC_BOT, null));
fillStat = maker.If(nullCheck, fillStat, null);
}
}
JCStatement unmodifiableStat; {
// pluralname = Collections.unmodifiableInterfaceType(pluralname);
JCExpression arg = maker.Ident(data.getPluralName());
JCExpression invoke = maker.Apply(jceBlank, chainDots(builderType, "java", "util", "Collections", "unmodifiable" + data.getTargetSimpleType()), List.of(arg));
unmodifiableStat = maker.Exec(maker.Assign(maker.Ident(data.getPluralName()), invoke));
}
return List.of(createStat, fillStat, unmodifiableStat);
}
}
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