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[lang] Create compiler for inline calls with variadic paremeters.
Signed-off-by: Stéphane Galland <galland@arakhne.org>
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plugins/io.sarl.lang/src/io/sarl/lang/compiler/SarlCompiler.java
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| /* | ||
| * $Id$ | ||
| * | ||
| * SARL is an general-purpose agent programming language. | ||
| * More details on http://www.sarl.io | ||
| * | ||
| * Copyright (C) 2014-2015 the original authors or authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package io.sarl.lang.compiler; | ||
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| import java.util.List; | ||
| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
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| import com.google.common.collect.Lists; | ||
| import com.google.inject.Inject; | ||
| import org.eclipse.xtend.core.compiler.XtendCompiler; | ||
| import org.eclipse.xtext.common.types.JvmAnnotationReference; | ||
| import org.eclipse.xtext.common.types.JvmAnnotationValue; | ||
| import org.eclipse.xtext.common.types.JvmExecutable; | ||
| import org.eclipse.xtext.common.types.JvmFormalParameter; | ||
| import org.eclipse.xtext.common.types.JvmIdentifiableElement; | ||
| import org.eclipse.xtext.common.types.JvmStringAnnotationValue; | ||
| import org.eclipse.xtext.common.types.JvmTypeAnnotationValue; | ||
| import org.eclipse.xtext.common.types.JvmTypeReference; | ||
| import org.eclipse.xtext.xbase.XAbstractFeatureCall; | ||
| import org.eclipse.xtext.xbase.XExpression; | ||
| import org.eclipse.xtext.xbase.compiler.output.ITreeAppendable; | ||
| import org.eclipse.xtext.xbase.typesystem.IBatchTypeResolver; | ||
| import org.eclipse.xtext.xbase.typesystem.IResolvedTypes; | ||
| import org.eclipse.xtext.xbase.typesystem.references.LightweightTypeReference; | ||
| import org.eclipse.xtext.xbase.util.XExpressionHelper; | ||
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| /** The compiler from SARL to the target language. | ||
| * | ||
| * <p>This compiler provide a specific support for inline annotations. Indeed, the Xbase inline evaluation does | ||
| * not support variadic parameters. This SARL compiler provides a support for variadic feature calls. | ||
| * | ||
| * @author $Author: sgalland$ | ||
| * @version $FullVersion$ | ||
| * @mavengroupid $GroupId$ | ||
| * @mavenartifactid $ArtifactId$ | ||
| * @since 0.4 | ||
| */ | ||
| public class SarlCompiler extends XtendCompiler { | ||
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| private static final String INLINE_VARIABLE_PREFIX = "$"; //$NON-NLS-1$ | ||
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| private static final String INLINE_VALUE_NAME = "value"; //$NON-NLS-1$ | ||
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| private static final String INLINE_IMPORTED_NAME = "imported"; //$NON-NLS-1$ | ||
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| private static final Pattern INLINE_VARIABLE_PATTERN = Pattern.compile("\\" + INLINE_VARIABLE_PREFIX //$NON-NLS-1$ | ||
| + "(\\" + INLINE_VARIABLE_PREFIX + "|[0-9]+)"); //$NON-NLS-1$ //$NON-NLS-2$ | ||
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| @Inject | ||
| private XExpressionHelper expressionHelper; | ||
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| @Inject | ||
| private IBatchTypeResolver batchTypeResolver; | ||
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| @Override | ||
| @SuppressWarnings({"checkstyle:cyclomaticcomplexity", "checkstyle:npathcomplexity"}) | ||
| protected synchronized void appendInlineFeatureCall(XAbstractFeatureCall call, ITreeAppendable target) { | ||
| final JvmAnnotationReference inlineAnnotation = this.expressionHelper.findInlineAnnotation(call); | ||
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| String formatString = null; | ||
| final List<JvmTypeReference> importedTypes = Lists.newArrayListWithCapacity(2); | ||
| for (JvmAnnotationValue annotationValue: inlineAnnotation.getValues()) { | ||
| if (INLINE_VALUE_NAME.equals(annotationValue.getValueName())) { | ||
| formatString = ((JvmStringAnnotationValue) annotationValue).getValues().get(0); | ||
| } else if (INLINE_IMPORTED_NAME.equals(annotationValue.getValueName())) { | ||
| JvmTypeAnnotationValue typeAnnotationValue = (JvmTypeAnnotationValue) annotationValue; | ||
| importedTypes.addAll(typeAnnotationValue.getValues()); | ||
| } | ||
| } | ||
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| if (formatString == null) { | ||
| throw new IllegalStateException(); | ||
| } | ||
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| final IResolvedTypes resolvedTypes = this.batchTypeResolver.resolveTypes(call); | ||
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| final List<XExpression> arguments = getActualArguments(call); | ||
| final JvmIdentifiableElement calledFeature = call.getFeature(); | ||
| int numberVariadicParameter = 0; | ||
| final int numberFormalParameters; | ||
| JvmFormalParameter formalVariadicParameter = null; | ||
| if (calledFeature instanceof JvmExecutable) { | ||
| JvmExecutable jvmexec = (JvmExecutable) calledFeature; | ||
| numberFormalParameters = jvmexec.getParameters().size(); | ||
| formalVariadicParameter = jvmexec.getParameters().get(numberFormalParameters - 1); | ||
| if (jvmexec.isVarArgs()) { | ||
| numberVariadicParameter = 1; | ||
| } | ||
| } else { | ||
| numberFormalParameters = arguments.size(); | ||
| } | ||
| final Matcher matcher = INLINE_VARIABLE_PATTERN.matcher(formatString); | ||
| int prevEnd = 0; | ||
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| while (matcher.find()) { | ||
| final int start = matcher.start(); | ||
| if (start != prevEnd) { | ||
| target.append(formatString.substring(prevEnd, start)); | ||
| } | ||
| final String indexOrDollar = matcher.group(1); | ||
| if (INLINE_VARIABLE_PREFIX.equals(indexOrDollar)) { | ||
| target.append(INLINE_VARIABLE_PREFIX); | ||
| } else { | ||
| final int index = Integer.parseInt(indexOrDollar) - 1; | ||
| final int numberImports = importedTypes.size(); | ||
| final int numberFormalParametersImports = numberFormalParameters + numberImports; | ||
| if (numberVariadicParameter != 0 && index < arguments.size() && index == (numberFormalParameters - 1)) { | ||
| XExpression argument = arguments.get(index); | ||
| appendArgument(argument, target, index > 0); | ||
| for (int i = index + 1; i < arguments.size(); ++i) { | ||
| target.append(", "); //$NON-NLS-1$ | ||
| argument = arguments.get(i); | ||
| appendArgument(argument, target, true); | ||
| } | ||
| } else if (index > numberFormalParametersImports) { | ||
| final List<LightweightTypeReference> typeArguments = resolvedTypes.getActualTypeArguments(call); | ||
| final LightweightTypeReference typeArgument = typeArguments.get(index - numberFormalParametersImports - 1); | ||
| serialize(typeArgument.getRawTypeReference().toTypeReference(), call, target); | ||
| } else if (index >= numberFormalParameters && index < numberFormalParametersImports) { | ||
| serialize(importedTypes.get(index - numberFormalParameters), call, target); | ||
| } else if (index == numberFormalParametersImports) { | ||
| appendTypeArguments(call, target); | ||
| } else if (index < arguments.size()) { | ||
| final XExpression argument = arguments.get(index); | ||
| appendArgument(argument, target, index > 0); | ||
| } else if (formalVariadicParameter != null) { | ||
| appendNullValue(formalVariadicParameter.getParameterType(), calledFeature, target); | ||
| } else { | ||
| throw new IllegalStateException(); | ||
| } | ||
| } | ||
| prevEnd = matcher.end(); | ||
| } | ||
| if (prevEnd != formatString.length()) { | ||
| target.append(formatString.substring(prevEnd)); | ||
| } | ||
| } | ||
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| } |
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