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XbaseCompiler.java
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XbaseCompiler.java
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/*******************************************************************************
* Copyright (c) 2010, 2022 itemis AG (http://www.itemis.eu) and others.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package org.eclipse.xtext.xbase.compiler;
import static com.google.common.collect.Sets.*;
import static org.eclipse.xtext.util.JavaVersion.*;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.common.util.TreeIterator;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.xtext.EcoreUtil2;
import org.eclipse.xtext.GrammarUtil;
import org.eclipse.xtext.Keyword;
import org.eclipse.xtext.common.types.JvmConstructor;
import org.eclipse.xtext.common.types.JvmDeclaredType;
import org.eclipse.xtext.common.types.JvmEnumerationLiteral;
import org.eclipse.xtext.common.types.JvmFormalParameter;
import org.eclipse.xtext.common.types.JvmGenericType;
import org.eclipse.xtext.common.types.JvmIdentifiableElement;
import org.eclipse.xtext.common.types.JvmOperation;
import org.eclipse.xtext.common.types.JvmSynonymTypeReference;
import org.eclipse.xtext.common.types.JvmType;
import org.eclipse.xtext.common.types.JvmTypeParameter;
import org.eclipse.xtext.common.types.JvmTypeReference;
import org.eclipse.xtext.common.types.TypesPackage;
import org.eclipse.xtext.generator.trace.ILocationData;
import org.eclipse.xtext.nodemodel.ICompositeNode;
import org.eclipse.xtext.nodemodel.INode;
import org.eclipse.xtext.nodemodel.util.NodeModelUtils;
import org.eclipse.xtext.util.JavaVersion;
import org.eclipse.xtext.util.Tuples;
import org.eclipse.xtext.xbase.XAbstractFeatureCall;
import org.eclipse.xtext.xbase.XAssignment;
import org.eclipse.xtext.xbase.XBasicForLoopExpression;
import org.eclipse.xtext.xbase.XBlockExpression;
import org.eclipse.xtext.xbase.XCasePart;
import org.eclipse.xtext.xbase.XCastedExpression;
import org.eclipse.xtext.xbase.XCatchClause;
import org.eclipse.xtext.xbase.XClosure;
import org.eclipse.xtext.xbase.XCollectionLiteral;
import org.eclipse.xtext.xbase.XConstructorCall;
import org.eclipse.xtext.xbase.XDoWhileExpression;
import org.eclipse.xtext.xbase.XExpression;
import org.eclipse.xtext.xbase.XFeatureCall;
import org.eclipse.xtext.xbase.XForLoopExpression;
import org.eclipse.xtext.xbase.XIfExpression;
import org.eclipse.xtext.xbase.XInstanceOfExpression;
import org.eclipse.xtext.xbase.XListLiteral;
import org.eclipse.xtext.xbase.XMemberFeatureCall;
import org.eclipse.xtext.xbase.XNullLiteral;
import org.eclipse.xtext.xbase.XReturnExpression;
import org.eclipse.xtext.xbase.XSetLiteral;
import org.eclipse.xtext.xbase.XSwitchExpression;
import org.eclipse.xtext.xbase.XSynchronizedExpression;
import org.eclipse.xtext.xbase.XThrowExpression;
import org.eclipse.xtext.xbase.XTryCatchFinallyExpression;
import org.eclipse.xtext.xbase.XVariableDeclaration;
import org.eclipse.xtext.xbase.XWhileExpression;
import org.eclipse.xtext.xbase.XbasePackage;
import org.eclipse.xtext.xbase.annotations.xAnnotations.XAnnotation;
import org.eclipse.xtext.xbase.annotations.xAnnotations.XAnnotationElementValuePair;
import org.eclipse.xtext.xbase.annotations.xAnnotations.XAnnotationsPackage;
import org.eclipse.xtext.xbase.compiler.output.ITreeAppendable;
import org.eclipse.xtext.xbase.featurecalls.IdentifiableSimpleNameProvider;
import org.eclipse.xtext.xbase.lib.CollectionLiterals;
import org.eclipse.xtext.xbase.lib.Exceptions;
import org.eclipse.xtext.xbase.lib.IterableExtensions;
import org.eclipse.xtext.xbase.lib.ObjectExtensions;
import org.eclipse.xtext.xbase.lib.Pair;
import org.eclipse.xtext.xbase.typesystem.IResolvedTypes;
import org.eclipse.xtext.xbase.typesystem.internal.FeatureLinkHelper;
import org.eclipse.xtext.xbase.typesystem.override.BottomResolvedOperation;
import org.eclipse.xtext.xbase.typesystem.override.OverrideTester;
import org.eclipse.xtext.xbase.typesystem.references.CompoundTypeReference;
import org.eclipse.xtext.xbase.typesystem.references.FunctionTypeReference;
import org.eclipse.xtext.xbase.typesystem.references.ITypeReferenceOwner;
import org.eclipse.xtext.xbase.typesystem.references.LightweightMergedBoundTypeArgument;
import org.eclipse.xtext.xbase.typesystem.references.LightweightTypeReference;
import org.eclipse.xtext.xbase.typesystem.util.DeclaratorTypeArgumentCollector;
import org.eclipse.xtext.xbase.typesystem.util.StandardTypeParameterSubstitutor;
import org.eclipse.xtext.xbase.util.XSwitchExpressionCompilationState;
import org.eclipse.xtext.xbase.util.XSwitchExpressions;
import org.eclipse.xtext.xbase.util.XbaseUsageCrossReferencer;
import com.google.common.base.Objects;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import com.google.inject.Inject;
/**
* @author Sven Efftinge - Initial contribution and API
* @author Sebastian Zarnekow
* @author Jan Koehnlein
* @author Anton Kosyakov
* @author Miro Spoenemann
* @author Moritz Eysholdt
* @author Dennis Huebner
* @author Lorenzo Bettini
* @author Christian Dientrich - bug#493900
* @author Karsten Thoms - bug#501975
* @author Stephane Galland
* @author Eva Poell - support for try with resources
*/
public class XbaseCompiler extends FeatureCallCompiler {
@Inject
private XSwitchExpressions switchExpressions;
@Inject
private FeatureLinkHelper featureLinkHelper;
@Inject
private OverrideTester overrideTester;
/**
* @param isReferenced unused in this context but necessary for dispatch signature
*/
protected void _toJavaStatement(XListLiteral literal, ITreeAppendable b, boolean isReferenced) {
for(XExpression element: literal.getElements())
internalToJavaStatement(element, b, true);
}
/**
* @param isReferenced unused in this context but necessary for dispatch signature
*/
protected void _toJavaStatement(final XSetLiteral literal, ITreeAppendable b, boolean isReferenced) {
for(XExpression element: literal.getElements())
internalToJavaStatement(element, b, true);
}
protected boolean isType(XExpression element, Class<?> clazz) {
return resolveType(element, clazz) != null;
}
/* @Nullable */
protected LightweightTypeReference resolveType(XExpression element, Class<?> clazz) {
LightweightTypeReference elementType = batchTypeResolver.resolveTypes(element).getActualType(element);
return elementType != null && elementType.isType(clazz) ? elementType : null;
}
protected LightweightTypeReference getCollectionElementType(XCollectionLiteral literal) {
LightweightTypeReference type = getLightweightType(literal);
if (type == null)
throw new IllegalStateException();
if(type.isArray()) {
LightweightTypeReference result = type.getComponentType();
if (result == null)
throw new IllegalStateException();
return result;
}
else if(type.isSubtypeOf(Collection.class) && type.hasTypeArguments()) {
return type.getTypeArguments().get(0).getInvariantBoundSubstitute();
}
return type.getOwner().newReferenceToObject();
}
protected void _toJavaExpression(XListLiteral literal, ITreeAppendable b) {
LightweightTypeReference literalType = batchTypeResolver.resolveTypes(literal).getActualType(literal);
if (literalType == null) {
b.append("error - couldn't compute type for literal : "+literal);
return;
}
if (literalType.isArray()) {
LightweightTypeReference expectedType = batchTypeResolver.resolveTypes(literal).getExpectedType(literal);
boolean skipTypeName = false;
if (expectedType != null && expectedType.isArray()) {
if (canUseArrayInitializer(literal, b)) {
skipTypeName = true;
}
}
if (!skipTypeName) {
if (literalType instanceof CompoundTypeReference) {
for (LightweightTypeReference c : literalType.getMultiTypeComponents()) {
if (c.isArray()) {
b.append("new ")
.append(c.getType()) // append raw type since we cannot create generic arrays
.append(" ");
break;
}
}
} else {
b.append("new ")
.append(literalType.getType()) // append raw type since we cannot create generic arrays
.append(" ");
}
}
if (literal.getElements().isEmpty()) {
b.append("{}");
} else {
b.append("{ ");
boolean isFirst = true;
for(XExpression element: literal.getElements()) {
if(!isFirst)
b.append(", ");
isFirst = false;
internalToJavaExpression(element, b);
}
b.append(" }");
}
return;
} else {
appendImmutableCollectionExpression(literal, b, "unmodifiableList", CollectionLiterals.class, "newArrayList");
}
}
protected void _toJavaExpression(XSetLiteral literal, ITreeAppendable b) {
LightweightTypeReference literalType = batchTypeResolver.resolveTypes(literal).getActualType(literal);
if (literalType == null) {
b.append("error - couldn't compute type for literal : "+literal);
return;
}
if (literalType.isType(Map.class)) {
LightweightTypeReference keyType = literalType.getTypeArguments().get(0);
LightweightTypeReference valueType = literalType.getTypeArguments().get(1);
b.append(Collections.class)
.append(".<").append(keyType).append(", ").append(valueType)
.append(">unmodifiableMap(");
b.append(CollectionLiterals.class).append(".<").append(keyType).append(", ").append(valueType).append(">newHashMap(");
Iterator<XExpression> elements = literal.getElements().iterator();
while(elements.hasNext()) {
XExpression element = elements.next();
internalToJavaExpression(element, b);
if (elements.hasNext()) {
b.append(", ");
}
}
b.append("))");
} else {
appendImmutableCollectionExpression(literal, b, "unmodifiableSet", CollectionLiterals.class, "newHashSet");
}
}
protected void appendImmutableCollectionExpression(XCollectionLiteral literal,
ITreeAppendable b, String collectionsMethod, Class<?> guavaHelper, String guavaHelperMethod) {
LightweightTypeReference collectionElementType = getCollectionElementType(literal);
b.append(Collections.class);
b.append(".<").append(collectionElementType).append(">").append(collectionsMethod).append("(");
b.append(guavaHelper).append(".<").append(collectionElementType).append(">").append(guavaHelperMethod).append("(");
boolean isFirst = true;
for(XExpression element: literal.getElements()) {
if(!isFirst)
b.append(", ");
isFirst = false;
if(element instanceof XNullLiteral) {
b.append("(").append(collectionElementType).append(")");
}
internalToJavaExpression(element, b);
}
b.append("))");
return;
}
protected boolean canUseArrayInitializer(XListLiteral literal, ITreeAppendable appendable) {
if (literal.eContainingFeature() == XbasePackage.Literals.XVARIABLE_DECLARATION__RIGHT
|| literal.eContainingFeature() == XAnnotationsPackage.Literals.XANNOTATION_ELEMENT_VALUE_PAIR__VALUE
|| literal.eContainingFeature() == XAnnotationsPackage.Literals.XANNOTATION__VALUE
) {
return canUseArrayInitializerImpl(literal, appendable);
}
return false;
}
protected boolean canUseArrayInitializerImpl(XListLiteral literal, ITreeAppendable appendable) {
for(XExpression element: literal.getElements()) {
if (isVariableDeclarationRequired(element, appendable, true))
return false;
}
return true;
}
@Override
protected List<XExpression> getActualArguments(XAbstractFeatureCall featureCall) {
EList<XExpression> actualArguments = featureCall.getActualArguments();
List<XExpression> normalizedArguments = normalizeBlockExpression(actualArguments);
return normalizedArguments;
}
@Override
protected ITreeAppendable appendTypeArguments(XAbstractFeatureCall call, ITreeAppendable original) {
if (!call.getTypeArguments().isEmpty()) {
return super.appendTypeArguments(call, original);
}
ILocationData completeLocationData = getLocationWithTypeArguments(call);
ITreeAppendable completeFeatureCallAppendable = completeLocationData != null ? original.trace(completeLocationData) : original;
IResolvedTypes resolvedTypes = batchTypeResolver.resolveTypes(call);
List<LightweightTypeReference> typeArguments = resolvedTypes.getActualTypeArguments(call);
if (!typeArguments.isEmpty()) {
for(LightweightTypeReference typeArgument: typeArguments) {
if (typeArgument.isWildcard()) {
return completeFeatureCallAppendable;
}
}
completeFeatureCallAppendable.append("<");
for (int i = 0; i < typeArguments.size(); i++) {
if (i != 0) {
completeFeatureCallAppendable.append(", ");
}
completeFeatureCallAppendable.append(typeArguments.get(i));
}
completeFeatureCallAppendable.append(">");
}
return completeFeatureCallAppendable;
}
@Override
protected void internalToConvertedExpression(XExpression obj, ITreeAppendable appendable) {
if (obj instanceof XBlockExpression) {
_toJavaExpression((XBlockExpression) obj, appendable);
} else if (obj instanceof XCastedExpression) {
_toJavaExpression((XCastedExpression) obj, appendable);
} else if (obj instanceof XClosure) {
_toJavaExpression((XClosure) obj, appendable);
} else if (obj instanceof XAnnotation) {
_toJavaExpression((XAnnotation) obj, appendable);
} else if (obj instanceof XConstructorCall) {
_toJavaExpression((XConstructorCall) obj, appendable);
} else if (obj instanceof XIfExpression) {
_toJavaExpression((XIfExpression) obj, appendable);
} else if (obj instanceof XInstanceOfExpression) {
_toJavaExpression((XInstanceOfExpression) obj, appendable);
} else if (obj instanceof XSwitchExpression) {
_toJavaExpression((XSwitchExpression) obj, appendable);
} else if (obj instanceof XTryCatchFinallyExpression) {
_toJavaExpression((XTryCatchFinallyExpression) obj, appendable);
} else if (obj instanceof XListLiteral) {
_toJavaExpression((XListLiteral) obj, appendable);
} else if (obj instanceof XSetLiteral) {
_toJavaExpression((XSetLiteral) obj, appendable);
} else if (obj instanceof XSynchronizedExpression) {
_toJavaExpression((XSynchronizedExpression) obj, appendable);
} else if (obj instanceof XReturnExpression) {
_toJavaExpression((XReturnExpression) obj, appendable);
} else if (obj instanceof XThrowExpression) {
_toJavaExpression((XThrowExpression) obj, appendable);
} else {
super.internalToConvertedExpression(obj, appendable);
}
}
@Override
protected void doInternalToJavaStatement(XExpression obj, ITreeAppendable appendable, boolean isReferenced) {
if (obj instanceof XBlockExpression) {
_toJavaStatement((XBlockExpression) obj, appendable, isReferenced);
} else if (obj instanceof XCastedExpression) {
_toJavaStatement((XCastedExpression) obj, appendable, isReferenced);
} else if (obj instanceof XClosure) {
_toJavaStatement((XClosure) obj, appendable, isReferenced);
} else if (obj instanceof XConstructorCall) {
_toJavaStatement((XConstructorCall) obj, appendable, isReferenced);
} else if (obj instanceof XDoWhileExpression) {
_toJavaStatement((XDoWhileExpression) obj, appendable, isReferenced);
} else if (obj instanceof XForLoopExpression) {
_toJavaStatement((XForLoopExpression) obj, appendable, isReferenced);
} else if (obj instanceof XBasicForLoopExpression) {
_toJavaStatement((XBasicForLoopExpression) obj, appendable, isReferenced);
} else if (obj instanceof XIfExpression) {
_toJavaStatement((XIfExpression) obj, appendable, isReferenced);
} else if (obj instanceof XInstanceOfExpression) {
_toJavaStatement((XInstanceOfExpression) obj, appendable, isReferenced);
} else if (obj instanceof XReturnExpression) {
_toJavaStatement((XReturnExpression) obj, appendable, isReferenced);
} else if (obj instanceof XSwitchExpression) {
_toJavaStatement((XSwitchExpression) obj, appendable, isReferenced);
} else if (obj instanceof XThrowExpression) {
_toJavaStatement((XThrowExpression) obj, appendable, isReferenced);
} else if (obj instanceof XTryCatchFinallyExpression) {
_toJavaStatement((XTryCatchFinallyExpression) obj, appendable, isReferenced);
} else if (obj instanceof XVariableDeclaration) {
_toJavaStatement((XVariableDeclaration) obj, appendable, isReferenced);
} else if (obj instanceof XWhileExpression) {
_toJavaStatement((XWhileExpression) obj, appendable, isReferenced);
} else if (obj instanceof XListLiteral) {
_toJavaStatement((XListLiteral) obj, appendable, isReferenced);
} else if (obj instanceof XSetLiteral) {
_toJavaStatement((XSetLiteral) obj, appendable, isReferenced);
} else if (obj instanceof XSynchronizedExpression) {
_toJavaStatement((XSynchronizedExpression) obj, appendable, isReferenced);
} else {
super.doInternalToJavaStatement(obj, appendable, isReferenced);
}
}
protected void _toJavaStatement(XBlockExpression expr, ITreeAppendable b, boolean isReferenced) {
b = b.trace(expr, false);
if (expr.getExpressions().isEmpty())
return;
if (expr.getExpressions().size()==1) {
internalToJavaStatement(expr.getExpressions().get(0), b, isReferenced);
return;
}
if (isReferenced)
declareSyntheticVariable(expr, b);
boolean needsBraces = isReferenced || !bracesAreAddedByOuterStructure(expr);
if (needsBraces) {
b.newLine().append("{").increaseIndentation();
b.openPseudoScope();
}
final EList<XExpression> expressions = expr.getExpressions();
for (int i = 0; i < expressions.size(); i++) {
XExpression ex = expressions.get(i);
if (i < expressions.size() - 1) {
internalToJavaStatement(ex, b, false);
} else {
internalToJavaStatement(ex, b, isReferenced);
if (isReferenced) {
b.newLine().append(getVarName(expr, b)).append(" = ");
internalToConvertedExpression(ex, b, getLightweightType(expr));
b.append(";");
}
}
}
if (needsBraces) {
b.closeScope();
b.decreaseIndentation().newLine().append("}");
}
}
protected boolean bracesAreAddedByOuterStructure(XExpression expression) {
EObject container = expression.eContainer();
if (container instanceof XTryCatchFinallyExpression
|| container instanceof XIfExpression
|| container instanceof XClosure
|| container instanceof XSynchronizedExpression) {
return true;
}
if (container instanceof XBlockExpression) {
XBlockExpression blockExpression = (XBlockExpression) container;
EList<XExpression> expressions = blockExpression.getExpressions();
if (expressions.size() == 1 && expressions.get(0) == expression) {
return bracesAreAddedByOuterStructure(blockExpression);
}
}
if (!(container instanceof XExpression)) {
return true;
}
return false;
}
protected void _toJavaExpression(XBlockExpression expr, ITreeAppendable b) {
if (expr.getExpressions().isEmpty()) {
b.append("null");
return;
}
if (expr.getExpressions().size()==1) {
// conversion was already performed for single expression blocks
internalToConvertedExpression(expr.getExpressions().get(0), b, null);
return;
}
b = b.trace(expr, false);
b.append(getVarName(expr, b));
}
protected void _toJavaStatement(XTryCatchFinallyExpression expr, ITreeAppendable outerAppendable, boolean isReferenced) {
ITreeAppendable b = outerAppendable.trace(expr, false);
// If Java 7 or better: use Java's try-with-resources
boolean nativeTryWithResources = isAtLeast(b, JAVA7);
List<XVariableDeclaration> resources = expr.getResources();
Map<String, LightweightTypeReference> resourceMap = new HashMap<String, LightweightTypeReference>();
boolean isTryWithResources = !resources.isEmpty();
if (isReferenced && !isPrimitiveVoid(expr)) {
declareSyntheticVariable(expr, b);
}
String throwablesStore = b.declareSyntheticVariable(Tuples.pair(expr, "_caughtThrowables"), "_ts");
if (isTryWithResources && !nativeTryWithResources) {
// The try block and/or invoking the close method later on might
// throw. Hence, we collect those Throwables and propagate them
// later on.
b.newLine().append(List.class);
b.append("<").append(Throwable.class).append("> ");
b.append(throwablesStore);
b.append(" = new ");
b.append(ArrayList.class);
b.append("<").append(Throwable.class).append(">();");
}
b.openPseudoScope();
// Resources declared before the try-statement, for java versions < 7
if (isTryWithResources && !nativeTryWithResources) {
for (XVariableDeclaration res : resources) {
b.newLine();
// resource has to be declared and initialized with null before
// try and with real AutoClosable implementation within try
// has to be var not val (final)
res.setWriteable(true);
LightweightTypeReference type = appendVariableTypeAndName(res, b);
resourceMap.put(res.getName(), type);
b.append(" = null;");
}
}
// Try
b.newLine().append("try ");
// Resources for java versions >= 7
// constructed with Java's try with resources
if (isTryWithResources && nativeTryWithResources) {
int isLast = resources.size();
int i = 0;
b.append("(");
for (XVariableDeclaration res : resources) {
LightweightTypeReference type = appendVariableTypeAndName(res, b);
b.append(" = ");
compileAsJavaExpression(res.getRight(), b, type);
if (++i < isLast)
b.append("; ");
}
b.append(") ");
}
b.append("{").increaseIndentation();
// Resources for java versions < 7
// constructed at the beginning of try-statement
if (isTryWithResources && !nativeTryWithResources) {
for (XVariableDeclaration res : resources) {
b.newLine();
b.append(getVarName(res, b));
b.append(" = ");
LightweightTypeReference type = resourceMap.get(res.getName());
compileAsJavaExpression(res.getRight(), b, type);
b.append(";");
}
}
// Expression
final boolean canBeReferenced = isReferenced && !isPrimitiveVoid(expr.getExpression());
internalToJavaStatement(expr.getExpression(), b, canBeReferenced);
if (canBeReferenced) {
b.newLine().append(getVarName(expr, b)).append(" = ");
internalToConvertedExpression(expr.getExpression(), b, getLightweightType(expr));
b.append(";");
}
b.decreaseIndentation().newLine().append("}");
// Catch and Finally
appendCatchAndFinally(expr, b, isReferenced);
b.closeScope();
}
protected void appendCatchAndFinally(XTryCatchFinallyExpression expr, ITreeAppendable b, boolean isReferenced) {
final EList<XCatchClause> catchClauses = expr.getCatchClauses();
final XExpression finallyExp = expr.getFinallyExpression();
boolean isTryWithResources = !expr.getResources().isEmpty();
// If Java 7 or better: use Java's try-with-resources
boolean nativeTryWithResources = isAtLeast(b, JAVA7);
final String throwablesStore = b.getName(Tuples.pair(expr, "_caughtThrowables"));
// Catch
if (!catchClauses.isEmpty()) {
String variable = b.declareSyntheticVariable(Tuples.pair(expr, "_caughtThrowable"), "_t");
b.append(" catch (final Throwable ").append(variable).append(") ");
b.append("{").increaseIndentation().newLine();
Iterator<XCatchClause> iterator = catchClauses.iterator();
while (iterator.hasNext()) {
XCatchClause catchClause = iterator.next();
ITreeAppendable catchClauseAppendable = b.trace(catchClause);
appendCatchClause(catchClause, isReferenced, variable, catchClauseAppendable);
if (iterator.hasNext()) {
b.append(" else ");
}
}
b.append(" else {");
b.increaseIndentation().newLine();
if (isTryWithResources && !nativeTryWithResources) {
b.append(throwablesStore + ".add(" + variable + ");").newLine();
}
appendSneakyThrow(expr, b, variable);
closeBlock(b);
closeBlock(b);
}
// Finally
if (finallyExp != null || (!nativeTryWithResources && isTryWithResources)) {
b.append(" finally {").increaseIndentation();
if (finallyExp != null)
internalToJavaStatement(finallyExp, b, false);
if (!nativeTryWithResources && isTryWithResources)
appendFinallyWithResources(expr, b);
b.decreaseIndentation().newLine().append("}");
}
}
protected void appendSneakyThrow(XTryCatchFinallyExpression expr, ITreeAppendable b, String variable) {
final JvmType sneakyThrowType = findKnownTopLevelType(Exceptions.class, expr);
if (sneakyThrowType == null) {
b.append("COMPILE ERROR : '" + Exceptions.class.getCanonicalName()
+ "' could not be found on the classpath!");
} else {
b.append("throw ");
b.append(sneakyThrowType);
b.append(".sneakyThrow(");
b.append(variable);
b.append(");");
}
}
protected void appendCatchClause(XCatchClause catchClause, boolean parentIsReferenced, String parentVariable,
ITreeAppendable appendable) {
JvmTypeReference type = catchClause.getDeclaredParam().getParameterType();
final String declaredParamName = makeJavaIdentifier(catchClause.getDeclaredParam().getName());
final String name = appendable.declareVariable(catchClause.getDeclaredParam(), declaredParamName);
appendable.append("if (");
JvmTypeReference typeToUse = type;
if (type instanceof JvmSynonymTypeReference) {
List<JvmTypeReference> references = ((JvmSynonymTypeReference) type).getReferences();
Iterator<JvmTypeReference> iter = references.iterator();
while(iter.hasNext()) {
appendable.append(parentVariable).append(" instanceof ");
serialize(iter.next(), catchClause, appendable);
if (iter.hasNext()) {
appendable.append(" || ");
}
}
typeToUse = resolveSynonymType((JvmSynonymTypeReference) type, catchClause);
} else {
appendable.append(parentVariable).append(" instanceof ");
serialize(type, catchClause, appendable);
}
appendable.append(") ").append("{");
appendable.increaseIndentation();
ITreeAppendable withDebugging = appendable.trace(catchClause, true);
if (!XbaseUsageCrossReferencer.find(catchClause.getDeclaredParam(), catchClause.getExpression()).isEmpty()) {
ITreeAppendable parameterAppendable = withDebugging.trace(catchClause.getDeclaredParam());
appendCatchClauseParameter(catchClause, typeToUse, name, parameterAppendable.newLine());
withDebugging.append(" = (");
serialize(typeToUse, catchClause, withDebugging);
withDebugging.append(")").append(parentVariable).append(";");
}
final boolean canBeReferenced = parentIsReferenced && ! isPrimitiveVoid(catchClause.getExpression());
internalToJavaStatement(catchClause.getExpression(), withDebugging, canBeReferenced);
if (canBeReferenced) {
appendable.newLine().append(getVarName(catchClause.eContainer(), appendable)).append(" = ");
internalToConvertedExpression(catchClause.getExpression(), appendable, getLightweightType((XExpression) catchClause.eContainer()));
appendable.append(";");
}
closeBlock(appendable);
}
protected void appendCatchClauseParameter(XCatchClause catchClause, JvmTypeReference parameterType, final String parameterName, ITreeAppendable appendable) {
appendable.append("final ");
serialize(parameterType, catchClause, appendable);
appendable.append(" ");
appendable.trace(catchClause.getDeclaredParam(), TypesPackage.Literals.JVM_FORMAL_PARAMETER__NAME, 0).append(parameterName);
}
protected JvmTypeReference resolveSynonymType(JvmSynonymTypeReference reference, EObject context) {
LightweightTypeReference lightweight = toLightweight(reference, context);
LightweightTypeReference superType = lightweight.getOwner().getServices().getTypeConformanceComputer().getCommonSuperType(lightweight.getMultiTypeComponents(), lightweight.getOwner());
return superType.toJavaCompliantTypeReference();
}
/**
* @since 2.18
*/
protected void appendFinallyWithResources(XTryCatchFinallyExpression expr, ITreeAppendable b) {
final String throwablesStore = b.getName(Tuples.pair(expr, "_caughtThrowables"));
List<XVariableDeclaration> resources = expr.getResources();
if (!resources.isEmpty()) {
for (int i = resources.size() - 1; i >= 0; i--) {
b.openPseudoScope();
XVariableDeclaration res = resources.get(i);
String resName = getVarName(res, b);
b.newLine().append("if (" + resName + " != null) {");
b.increaseIndentation();
b.newLine().append("try {");
b.increaseIndentation();
b.newLine().append(resName + ".close();");
// close inner try
closeBlock(b);
String throwable = b.declareSyntheticVariable(Tuples.pair(res, "_caughtThrowable"), "_t");
b.append(" catch (").append(Throwable.class).append(" " + throwable + ") {");
b.increaseIndentation();
b.newLine().append(throwablesStore);
b.append(".add(" + throwable + ");");
// close inner catch
closeBlock(b);
// close if != null check
closeBlock(b);
b.closeScope();
}
b.newLine().append("if(!");
b.append(throwablesStore);
b.append(".isEmpty()) ");
appendSneakyThrow(expr, b, throwablesStore + ".get(0)");
}
}
/**
* @since 2.18
*/
protected boolean isAtLeast(ITreeAppendable b, JavaVersion version) {
GeneratorConfig config = b.getGeneratorConfig();
return config != null && config.getJavaSourceVersion().isAtLeast(version);
}
protected void _toJavaExpression(XTryCatchFinallyExpression expr, ITreeAppendable b) {
b.trace(expr, false).append(getVarName(expr, b));
}
/**
* @param isReferenced unused in this context but necessary for dispatch signature
*/
protected void _toJavaStatement(XThrowExpression expr, ITreeAppendable b, boolean isReferenced) {
internalToJavaStatement(expr.getExpression(), b, true);
b.newLine().append("throw ");
internalToConvertedExpression(expr.getExpression(), b, null);
b.append(";");
}
protected void _toJavaExpression(XInstanceOfExpression expr, ITreeAppendable b) {
b.append("(");
internalToJavaExpression(expr.getExpression(), b);
b.append(" instanceof ");
serialize(expr.getType(), expr, b);
b.append(")");
}
/**
* @param isReferenced unused in this context but necessary for dispatch signature
*/
protected void _toJavaStatement(XInstanceOfExpression expr, ITreeAppendable b, boolean isReferenced) {
internalToJavaStatement(expr.getExpression(), b, true);
}
/**
* @param isReferenced unused in this context but necessary for dispatch signature
*/
protected void _toJavaStatement(XVariableDeclaration varDeclaration, ITreeAppendable b, boolean isReferenced) {
if (varDeclaration.getRight() != null) {
internalToJavaStatement(varDeclaration.getRight(), b, true);
}
b.newLine();
LightweightTypeReference type = appendVariableTypeAndName(varDeclaration, b);
b.append(" = ");
if (varDeclaration.getRight() != null) {
internalToConvertedExpression(varDeclaration.getRight(), b, type);
} else {
appendDefaultLiteral(b, type);
}
b.append(";");
}
protected LightweightTypeReference appendVariableTypeAndName(XVariableDeclaration varDeclaration, ITreeAppendable appendable) {
if (!varDeclaration.isWriteable()) {
appendable.append("final ");
}
LightweightTypeReference type = null;
if (varDeclaration.getType() != null) {
serialize(varDeclaration.getType(), varDeclaration, appendable);
type = getLightweightType((JvmIdentifiableElement) varDeclaration);
} else {
type = getLightweightType(varDeclaration.getRight());
if (type.isAny()) {
type = getTypeForVariableDeclaration(varDeclaration.getRight());
}
appendable.append(type);
}
appendable.append(" ");
appendable.append(appendable.declareVariable(varDeclaration, makeJavaIdentifier(varDeclaration.getName())));
return type;
}
/**
* @param isReferenced unused in this context but necessary for dispatch signature
*/
protected void _toJavaStatement(XWhileExpression expr, ITreeAppendable b, boolean isReferenced) {
boolean needsStatement = !canCompileToJavaExpression(expr.getPredicate(), b);
String varName = null;
if (needsStatement) {
internalToJavaStatement(expr.getPredicate(), b, true);
varName = b.declareSyntheticVariable(expr, "_while");
b.newLine().append("boolean ").append(varName).append(" = ");
internalToJavaExpression(expr.getPredicate(), b);
b.append(";");
}
b.newLine().append("while (");
if (needsStatement) {
b.append(varName);
} else {
internalToJavaExpression(expr.getPredicate(), b);
}
b.append(") {").increaseIndentation();
b.openPseudoScope();
internalToJavaStatement(expr.getBody(), b, false);
if (needsStatement && !isEarlyExit(expr.getBody())) {
internalToJavaStatement(expr.getPredicate(), b, true);
b.newLine();
b.append(varName).append(" = ");
internalToJavaExpression(expr.getPredicate(), b);
b.append(";");
}
b.closeScope();
b.decreaseIndentation().newLine().append("}");
}
/**
* @param isReferenced unused in this context but necessary for dispatch signature
*/
protected void _toJavaStatement(XDoWhileExpression expr, ITreeAppendable b, boolean isReferenced) {
boolean needsStatement = !canCompileToJavaExpression(expr.getPredicate(), b);
String variable = null;
if (needsStatement) {
variable = b.declareSyntheticVariable(expr, "_dowhile");
b.newLine().append("boolean ").append(variable).append(" = false;");
}
b.newLine().append("do {").increaseIndentation();
internalToJavaStatement(expr.getBody(), b, false);
if (needsStatement && !isEarlyExit(expr.getBody())) {
internalToJavaStatement(expr.getPredicate(), b, true);
b.newLine();
b.append(variable).append(" = ");
internalToJavaExpression(expr.getPredicate(), b);
b.append(";");
}
b.decreaseIndentation().newLine().append("} while(");
if (needsStatement) {
b.append(variable);
} else {
internalToJavaExpression(expr.getPredicate(), b);
}
b.append(");");
}
protected void _toJavaStatement(XBasicForLoopExpression expr, ITreeAppendable b, boolean isReferenced) {
if (canCompileToJavaBasicForStatement(expr, b)) {
toJavaBasicForStatement(expr, b, isReferenced);
} else {
toJavaWhileStatement(expr, b, isReferenced);
}
}
protected boolean canCompileToJavaBasicForStatement(XBasicForLoopExpression expr, ITreeAppendable b) {
EList<XExpression> initExpressions = expr.getInitExpressions();
XExpression firstInitExpression = IterableExtensions.head(initExpressions);
if (initExpressions.size() == 1 && firstInitExpression instanceof XVariableDeclaration) {
XVariableDeclaration variableDeclaration = (XVariableDeclaration) firstInitExpression;
XExpression right = variableDeclaration.getRight();
if (right != null && !canCompileToJavaExpression(right, b)) {
return false;
}
} else {
for (XExpression expression : initExpressions) {
if (!canCompileToJavaExpression(expression, b)) {
return false;
}
}
}
XExpression predicate = expr.getExpression();
if (predicate != null && !canCompileToJavaExpression(predicate, b)) {
return false;
}
for (XExpression expression : expr.getUpdateExpressions()) {
if (!canCompileToJavaExpression(expression, b)) {
return false;
}
}
return true;
}
/**
* @param isReferenced unused in this context but necessary for dispatch signature
*/
protected void toJavaBasicForStatement(XBasicForLoopExpression expr, ITreeAppendable b, boolean isReferenced) {
ITreeAppendable loopAppendable = b.trace(expr);
loopAppendable.openPseudoScope();
loopAppendable.newLine().append("for (");
EList<XExpression> initExpressions = expr.getInitExpressions();
XExpression firstInitExpression = IterableExtensions.head(initExpressions);
if (firstInitExpression instanceof XVariableDeclaration) {
XVariableDeclaration variableDeclaration = (XVariableDeclaration) firstInitExpression;
LightweightTypeReference type = appendVariableTypeAndName(variableDeclaration, loopAppendable);
loopAppendable.append(" = ");
if (variableDeclaration.getRight() != null) {
compileAsJavaExpression(variableDeclaration.getRight(), loopAppendable, type);
} else {
appendDefaultLiteral(loopAppendable, type);
}
} else {
for (int i = 0; i < initExpressions.size(); i++) {
if (i != 0) {
loopAppendable.append(", ");
}
XExpression initExpression = initExpressions.get(i);
compileAsJavaExpression(initExpression, loopAppendable, getLightweightType(initExpression));
}
}
loopAppendable.append(";");
XExpression expression = expr.getExpression();
if (expression != null) {
loopAppendable.append(" ");
internalToJavaExpression(expression, loopAppendable);
}
loopAppendable.append(";");
EList<XExpression> updateExpressions = expr.getUpdateExpressions();
for (int i = 0; i < updateExpressions.size(); i++) {
if (i != 0) {
loopAppendable.append(",");
}
loopAppendable.append(" ");
XExpression updateExpression = updateExpressions.get(i);
internalToJavaExpression(updateExpression, loopAppendable);
}
loopAppendable.append(") {").increaseIndentation();
XExpression eachExpression = expr.getEachExpression();
internalToJavaStatement(eachExpression, loopAppendable, false);
loopAppendable.decreaseIndentation().newLine().append("}");
loopAppendable.closeScope();
}
protected void toJavaWhileStatement(XBasicForLoopExpression expr, ITreeAppendable b, boolean isReferenced) {
ITreeAppendable loopAppendable = b.trace(expr);
boolean needBraces = !bracesAreAddedByOuterStructure(expr);
if (needBraces) {
loopAppendable.newLine().increaseIndentation().append("{");
loopAppendable.openPseudoScope();
}
EList<XExpression> initExpressions = expr.getInitExpressions();
for (int i = 0; i < initExpressions.size(); i++) {
XExpression initExpression = initExpressions.get(i);
if (i < initExpressions.size() - 1) {
internalToJavaStatement(initExpression, loopAppendable, false);
} else {
internalToJavaStatement(initExpression, loopAppendable, isReferenced);
if (isReferenced) {
loopAppendable.newLine().append(getVarName(expr, loopAppendable)).append(" = (");
internalToConvertedExpression(initExpression, loopAppendable, getLightweightType(expr));
loopAppendable.append(");");
}
}
}
final String varName = loopAppendable.declareSyntheticVariable(expr, "_while");
XExpression expression = expr.getExpression();
if (expression != null) {
internalToJavaStatement(expression, loopAppendable, true);
loopAppendable.newLine().append("boolean ").append(varName).append(" = ");
internalToJavaExpression(expression, loopAppendable);
loopAppendable.append(";");
} else {
loopAppendable.newLine().append("boolean ").append(varName).append(" = true;");
}
loopAppendable.newLine();
loopAppendable.append("while (");
loopAppendable.append(varName);
loopAppendable.append(") {").increaseIndentation();
loopAppendable.openPseudoScope();
XExpression eachExpression = expr.getEachExpression();
internalToJavaStatement(eachExpression, loopAppendable, false);
EList<XExpression> updateExpressions = expr.getUpdateExpressions();
if (!updateExpressions.isEmpty()) {
for (XExpression updateExpression : updateExpressions) {
internalToJavaStatement(updateExpression, loopAppendable, false);
}
}
if (!isEarlyExit(eachExpression)) {
if (expression != null) {
internalToJavaStatement(expression, loopAppendable, true);
loopAppendable.newLine().append(varName).append(" = ");
internalToJavaExpression(expression, loopAppendable);
loopAppendable.append(";");
} else {
loopAppendable.newLine().append(varName).append(" = true;");
}
}
loopAppendable.closeScope();
loopAppendable.decreaseIndentation().newLine().append("}");
if (needBraces) {
loopAppendable.closeScope();
loopAppendable.decreaseIndentation().newLine().append("}");