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javac's HandleData now makes equals methods.

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Reinier Zwitserloot committed 2009-06-25 05:34:01 +02:00
1 parent dec4be3738
commit 19fec30bc1
2 files changed
+145 -1
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src/lombok/javac/handlers/HandleData.java
+131 -1
View File
@@ -12,10 +12,15 @@ import lombok.javac.JavacAST.Node;
import org.mangosdk.spi.ProviderFor;
import com.sun.tools.javac.code.BoundKind;
import com.sun.tools.javac.code.Flags;
import com.sun.tools.javac.code.TypeTags;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.TreeMaker;
import com.sun.tools.javac.tree.JCTree.JCAnnotation;
import com.sun.tools.javac.tree.JCTree.JCArrayTypeTree;
import com.sun.tools.javac.tree.JCTree.JCAssign;
import com.sun.tools.javac.tree.JCTree.JCBinary;
import com.sun.tools.javac.tree.JCTree.JCBlock;
import com.sun.tools.javac.tree.JCTree.JCClassDecl;
import com.sun.tools.javac.tree.JCTree.JCExpression;
@@ -23,12 +28,14 @@ import com.sun.tools.javac.tree.JCTree.JCFieldAccess;
import com.sun.tools.javac.tree.JCTree.JCIdent;
import com.sun.tools.javac.tree.JCTree.JCMethodDecl;
import com.sun.tools.javac.tree.JCTree.JCModifiers;
import com.sun.tools.javac.tree.JCTree.JCPrimitiveTypeTree;
import com.sun.tools.javac.tree.JCTree.JCReturn;
import com.sun.tools.javac.tree.JCTree.JCStatement;
import com.sun.tools.javac.tree.JCTree.JCTypeApply;
import com.sun.tools.javac.tree.JCTree.JCTypeParameter;
import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
import com.sun.tools.javac.util.List;
import com.sun.tools.javac.util.Name;
@ProviderFor(JavacAnnotationHandler.class)
public class HandleData implements JavacAnnotationHandler<Data> {
@@ -71,10 +78,133 @@ public class HandleData implements JavacAnnotationHandler<Data> {
injectMethod(typeNode, staticConstructor);
}
//TODO hashCode, equals, toString.
if ( methodExists("equals", typeNode) == MethodExistsResult.NOT_EXISTS ) {
JCMethodDecl method = createEquals(typeNode, nodesForEquality);
injectMethod(typeNode, method);
}
//TODO hashCode, toString.
return true;
}
private JCMethodDecl createEquals(Node typeNode, List<Node> fields) {
TreeMaker maker = typeNode.getTreeMaker();
JCClassDecl type = (JCClassDecl) typeNode.get();
Name oName = typeNode.toName("o");
Name otherName = typeNode.toName("other");
Name thisName = typeNode.toName("this");
JCModifiers mods = maker.Modifiers(Flags.PUBLIC);
JCExpression objectType = maker.Type(typeNode.getSymbolTable().objectType);
JCExpression returnType = maker.TypeIdent(TypeTags.BOOLEAN);
List<JCStatement> statements = List.nil();
List<JCVariableDecl> params = List.of(maker.VarDef(maker.Modifiers(0), oName, objectType, null));
/* if ( o == this ) return true; */ {
statements = statements.append(
maker.If(maker.Binary(JCTree.EQ, maker.Ident(oName), maker.Ident(thisName)), returnBool(maker, true), null));
}
/* if ( o == null ) return false; */ {
statements = statements.append(
maker.If(maker.Binary(JCTree.EQ, maker.Ident(oName), maker.Literal(TypeTags.BOT, null)), returnBool(maker, false), null));
}
/* if ( o.getClass() != this.getClass() ) return false; */ {
Name getClass = typeNode.toName("getClass");
List<JCExpression> exprNil = List.nil();
JCExpression oGetClass = maker.Apply(exprNil, maker.Select(maker.Ident(oName), getClass), exprNil);
JCExpression thisGetClass = maker.Apply(exprNil, maker.Select(maker.Ident(thisName), getClass), exprNil);
statements = statements.append(
maker.If(maker.Binary(JCTree.NE, oGetClass, thisGetClass), returnBool(maker, false), null));
}
/* MyType<?> other = (MyType<?>) o; */ {
final JCExpression selfType1, selfType2;
List<JCExpression> wildcards1 = List.nil();
List<JCExpression> wildcards2 = List.nil();
for ( int i = 0 ; i < type.typarams.length() ; i++ ) {
wildcards1 = wildcards1.append(maker.Wildcard(maker.TypeBoundKind(BoundKind.UNBOUND), null));
wildcards2 = wildcards2.append(maker.Wildcard(maker.TypeBoundKind(BoundKind.UNBOUND), null));
}
if ( type.typarams.isEmpty() ) {
selfType1 = maker.Ident(type.name);
selfType2 = maker.Ident(type.name);
} else {
selfType1 = maker.TypeApply(maker.Ident(type.name), wildcards1);
selfType2 = maker.TypeApply(maker.Ident(type.name), wildcards2);
}
statements = statements.append(
maker.VarDef(maker.Modifiers(Flags.FINAL), otherName, selfType1, maker.TypeCast(selfType2, maker.Ident(oName))));
}
for ( Node fieldNode : fields ) {
JCVariableDecl field = (JCVariableDecl) fieldNode.get();
JCExpression fType = field.vartype;
JCExpression thisDotField = maker.Select(maker.Ident(thisName), field.name);
JCExpression otherDotField = maker.Select(maker.Ident(otherName), field.name);
if ( fType instanceof JCPrimitiveTypeTree ) {
switch ( ((JCPrimitiveTypeTree)fType).getPrimitiveTypeKind() ) {
case FLOAT:
/* if ( Float.compare(this.fieldName, other.fieldName) != 0 ) return false; */
statements = statements.append(generateCompareFloatOrDouble(thisDotField, otherDotField, maker, typeNode, false));
break;
case DOUBLE:
/* if ( Double(this.fieldName, other.fieldName) != 0 ) return false; */
statements = statements.append(generateCompareFloatOrDouble(thisDotField, otherDotField, maker, typeNode, true));
break;
default:
/* if ( this.fieldName != other.fieldName ) return false; */
statements = statements.append(
maker.If(maker.Binary(JCTree.NE, thisDotField, otherDotField), returnBool(maker, false), null));
break;
}
} else if ( fType instanceof JCArrayTypeTree ) {
/* if ( !java.util.Arrays.deepEquals(this.fieldName, other.fieldName) ) return false; //use equals for primitive arrays. */
boolean multiDim = ((JCArrayTypeTree)fType).elemtype instanceof JCArrayTypeTree;
boolean primitiveArray = ((JCArrayTypeTree)fType).elemtype instanceof JCPrimitiveTypeTree;
boolean useDeepEquals = multiDim || !primitiveArray;
JCExpression eqMethod = chainDots(maker, typeNode, "java", "util", "Arrays", useDeepEquals ? "deepEquals" : "equals");
List<JCExpression> args = List.of(thisDotField, otherDotField);
statements = statements.append(maker.If(maker.Unary(JCTree.NOT,
maker.Apply(List.<JCExpression>nil(), eqMethod, args)), returnBool(maker, false), null));
} else /* objects */ {
/* if ( this.fieldName == null ? other.fieldName != null : !this.fieldName.equals(other.fieldName) ) return false; */
JCExpression thisEqualsNull = maker.Binary(JCTree.EQ, thisDotField, maker.Literal(TypeTags.BOT, null));
JCExpression otherNotEqualsNull = maker.Binary(JCTree.NE, otherDotField, maker.Literal(TypeTags.BOT, null));
JCExpression thisEqualsThat = maker.Apply(
List.<JCExpression>nil(), maker.Select(thisDotField, typeNode.toName("equals")), List.of(otherDotField));
JCExpression fieldsAreNotEqual = maker.Conditional(thisEqualsNull, otherNotEqualsNull, maker.Unary(JCTree.NOT, thisEqualsThat));
statements = statements.append(maker.If(fieldsAreNotEqual, returnBool(maker, false), null));
}
}
/* return true; */ {
statements = statements.append(returnBool(maker, true));
}
JCBlock body = maker.Block(0, statements);
return maker.MethodDef(mods, typeNode.toName("equals"), returnType, List.<JCTypeParameter>nil(), params, List.<JCExpression>nil(), body, null);
}
private JCStatement generateCompareFloatOrDouble(JCExpression thisDotField, JCExpression otherDotField, TreeMaker maker, Node node, boolean isDouble) {
/* if ( Float.compare(fieldName, other.fieldName) != 0 ) return false; */
JCExpression clazz = chainDots(maker, node, "java", "lang", isDouble ? "Double" : "Float");
List<JCExpression> args = List.of(thisDotField, otherDotField);
JCBinary compareCallEquals0 = maker.Binary(JCTree.NE, maker.Apply(
List.<JCExpression>nil(), maker.Select(clazz, node.toName("compare")), args), maker.Literal(0));
return maker.If(compareCallEquals0, returnBool(maker, false), null);
}
private JCStatement returnBool(TreeMaker maker, boolean bool) {
return maker.Return(maker.Literal(TypeTags.BOOLEAN, bool ? 1 : 0));
}
private JCMethodDecl createConstructor(boolean isPublic, Node typeNode, List<Node> fields) {
TreeMaker maker = typeNode.getTreeMaker();
JCClassDecl type = (JCClassDecl) typeNode.get();
src/lombok/javac/handlers/PKG.java
+14
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@@ -4,7 +4,9 @@ import java.lang.reflect.Modifier;
import com.sun.tools.javac.code.Flags;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.TreeMaker;
import com.sun.tools.javac.tree.JCTree.JCClassDecl;
import com.sun.tools.javac.tree.JCTree.JCExpression;
import com.sun.tools.javac.tree.JCTree.JCMethodDecl;
import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
import com.sun.tools.javac.util.List;
@@ -123,4 +125,16 @@ class PKG {
}
return out;
}
static JCExpression chainDots(TreeMaker maker, JavacAST.Node node, String... elems) {
assert elems != null;
assert elems.length > 0;
JCExpression e = maker.Ident(node.toName(elems[0]));
for ( int i = 1 ; i < elems.length ; i++ ) {
e = maker.Select(e, node.toName(elems[i]));
}
return e;
}
}