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Spice up your java: Automatic Resource Management, automatic generation of getters, setters, equals, hashCode and toString, and more!
/*
* Copyright (C) 2015 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 org.mangosdk.spi.ProviderFor;
import lombok.core.LombokImmutableList;
import lombok.javac.JavacNode;
import lombok.javac.JavacTreeMaker;
import lombok.javac.handlers.JavacSingularsRecipes.JavacSingularizer;
import lombok.javac.handlers.JavacSingularsRecipes.SingularData;
import com.sun.tools.javac.tree.JCTree;
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;
@ProviderFor(JavacSingularizer.class)
public class JavacJavaUtilListSingularizer extends JavacJavaUtilListSetSingularizer {
@Override public LombokImmutableList getSupportedTypes() {
return LombokImmutableList.of("java.util.List", "java.util.Collection", "java.lang.Iterable");
}
@Override public void appendBuildCode(SingularData data, JavacNode builderType, JCTree source, ListBuffer statements, Name targetVariableName, String builderVariable) {
if (useGuavaInstead(builderType)) {
guavaListSetSingularizer.appendBuildCode(data, builderType, source, statements, targetVariableName, builderVariable);
return;
}
JavacTreeMaker maker = builderType.getTreeMaker();
List jceBlank = List.nil();
ListBuffer cases = new ListBuffer();
/* case 0: (empty); break; */ {
JCStatement assignStat; {
// pluralName = java.util.Collections.emptyList();
JCExpression invoke = maker.Apply(jceBlank, chainDots(builderType, "java", "util", "Collections", "emptyList"), 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);
}
/* case 1: (singletonList); break; */ {
JCStatement assignStat; {
// pluralName = java.util.Collections.singletonList(this.pluralName.get(0));
JCExpression zeroLiteral = maker.Literal(CTC_INT, 0);
JCExpression arg = maker.Apply(jceBlank, chainDots(builderType, builderVariable, data.getPluralName().toString(), "get"), List.of(zeroLiteral));
List args = List.of(arg);
JCExpression invoke = maker.Apply(jceBlank, chainDots(builderType, "java", "util", "Collections", "singletonList"), 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: Create with right size, then addAll */ {
List defStats = createListCopy(maker, data, builderType, source, builderVariable);
JCCase defaultCase = maker.Case(null, defStats);
cases.append(defaultCase);
}
JCStatement switchStat = maker.Switch(getSize(maker, builderType, data.getPluralName(), true, false, builderVariable), cases.toList());
JCExpression localShadowerType = chainDotsString(builderType, data.getTargetFqn());
localShadowerType = addTypeArgs(1, false, builderType, localShadowerType, data.getTypeArgs(), source);
JCStatement varDefStat = maker.VarDef(maker.Modifiers(0), data.getPluralName(), localShadowerType, null);
statements.append(varDefStat);
statements.append(switchStat);
}
private List createListCopy(JavacTreeMaker maker, SingularData data, JavacNode builderType, JCTree source, String builderVariable) {
List jceBlank = List.nil();
Name thisName = builderType.toName(builderVariable);
JCExpression argToUnmodifiable; {
// new java.util.ArrayList(this.pluralName);
List constructorArgs = List.nil();
JCExpression thisDotPluralName = maker.Select(maker.Ident(thisName), data.getPluralName());
constructorArgs = List.of(thisDotPluralName);
JCExpression targetTypeExpr = chainDots(builderType, "java", "util", "ArrayList");
targetTypeExpr = addTypeArgs(1, false, builderType, targetTypeExpr, data.getTypeArgs(), source);
argToUnmodifiable = maker.NewClass(null, jceBlank, targetTypeExpr, constructorArgs, null);
}
JCStatement unmodifiableStat; {
// pluralname = Collections.unmodifiableInterfaceType(-newlist-);
JCExpression invoke = maker.Apply(jceBlank, chainDots(builderType, "java", "util", "Collections", "unmodifiableList"), List.of(argToUnmodifiable));
unmodifiableStat = maker.Exec(maker.Assign(maker.Ident(data.getPluralName()), invoke));
}
return List.of(unmodifiableStat);
}
}