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A packaging of the IntelliJ Community Edition groovy-psi library.
This is release number 1 of trunk branch 142.
The newest version!
/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* 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.
*/
package org.jetbrains.plugins.groovy.lang.psi.typeEnhancers;
import com.intellij.psi.CommonClassNames;
import com.intellij.psi.PsiPrimitiveType;
import com.intellij.psi.PsiType;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.plugins.groovy.lang.psi.GroovyPsiElement;
import org.jetbrains.plugins.groovy.lang.psi.api.auxiliary.GrListOrMap;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrVariable;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrAssignmentExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.literals.GrLiteral;
import org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.ConversionResult;
import org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.TypesUtil;
public class GrCharConverter extends GrTypeConverter {
@Override
public boolean isApplicableTo(@NotNull ApplicableTo position) {
return position == ApplicableTo.EXPLICIT_CAST || position == ApplicableTo.ASSIGNMENT || position == ApplicableTo.RETURN_VALUE;
}
@Nullable
@Override
public ConversionResult isConvertibleEx(@NotNull PsiType lType,
@NotNull PsiType rType,
@NotNull GroovyPsiElement context,
@NotNull ApplicableTo currentPosition) {
if (PsiType.CHAR != TypesUtil.unboxPrimitiveTypeWrapper(lType)) return null;
if (PsiType.CHAR == TypesUtil.unboxPrimitiveTypeWrapper(rType)) return ConversionResult.OK;
// can cast and assign numeric types to char
if (TypesUtil.isNumericType(rType)) {
if (rType instanceof PsiPrimitiveType ||
currentPosition != ApplicableTo.EXPLICIT_CAST && TypesUtil.unboxPrimitiveTypeWrapper(rType) instanceof PsiPrimitiveType) {
return PsiType.CHAR == lType ? ConversionResult.OK : ConversionResult.ERROR;
}
else {
// BigDecimal && BigInteger
return ConversionResult.ERROR;
}
}
{ // special case 'c = []' will throw RuntimeError
final GrExpression rValue;
if (context instanceof GrAssignmentExpression) {
final GrAssignmentExpression assignmentExpression = (GrAssignmentExpression)context;
rValue = assignmentExpression.getRValue();
}
else if (context instanceof GrVariable) {
final GrVariable assignmentExpression = (GrVariable)context;
rValue = assignmentExpression.getInitializerGroovy();
}
else {
rValue = null;
}
if (rValue instanceof GrListOrMap && ((GrListOrMap)rValue).isEmpty()) {
return ConversionResult.WARNING;
}
}
if (PsiType.BOOLEAN == TypesUtil.unboxPrimitiveTypeWrapper(rType)) {
switch (currentPosition) {
case EXPLICIT_CAST:
return ConversionResult.ERROR;
case ASSIGNMENT:
case RETURN_VALUE:
return ConversionResult.WARNING;
default:
return null;
}
}
// one-symbol string-to-char conversion doesn't work with return value
if (currentPosition == ApplicableTo.RETURN_VALUE) {
return null;
}
// can cast and assign one-symbol strings to char
if (!TypesUtil.isClassType(rType, CommonClassNames.JAVA_LANG_STRING)) return null;
final GrLiteral literal = getLiteral(context);
final Object value = literal == null ? null : literal.getValue();
return value == null ? null : value.toString().length() == 1 ? ConversionResult.OK : ConversionResult.ERROR;
}
}