IndexedExpressionConversionPredicate.java

/*
 * Copyright 2000-2017 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.
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package org.jetbrains.plugins.groovy.intentions.conversions;

import com.intellij.psi.PsiElement;
import com.intellij.psi.tree.IElementType;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.plugins.groovy.intentions.base.PsiElementPredicate;
import org.jetbrains.plugins.groovy.lang.lexer.GroovyTokenTypes;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.arguments.GrArgumentList;
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.path.GrIndexProperty;
import org.jetbrains.plugins.groovy.lang.psi.util.ErrorUtil;


class IndexedExpressionConversionPredicate implements PsiElementPredicate {
    @Override
    public boolean satisfiedBy(@NotNull PsiElement element) {
        if (!(element instanceof GrIndexProperty)) return false;

        if (ErrorUtil.containsError(element)) return false;

        final GrIndexProperty arrayIndexExpression = (GrIndexProperty) element;
        final PsiElement lastChild = arrayIndexExpression.getLastChild();
        if (!(lastChild instanceof GrArgumentList)) return false;

        final GrArgumentList argList = (GrArgumentList) lastChild;

        final GrExpression[] arguments = argList.getExpressionArguments();
        if (arguments.length != 1) return false;

        final PsiElement parent = element.getParent();
        if (!(parent instanceof GrAssignmentExpression)) {
            return true;
        }
        final GrAssignmentExpression assignmentExpression = (GrAssignmentExpression) parent;
        final GrExpression rvalue = assignmentExpression.getRValue();
        if (rvalue == null) return false;

        if (rvalue.equals(element)) return true;

        final IElementType operator = assignmentExpression.getOperationTokenType();
        return GroovyTokenTypes.mASSIGN.equals(operator);
    }

}