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/*
* 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.codeInspection.control;
import com.intellij.psi.PsiElement;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.plugins.groovy.codeInspection.BaseInspection;
import org.jetbrains.plugins.groovy.codeInspection.BaseInspectionVisitor;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrIfStatement;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrStatement;
public class GroovyIfStatementWithTooManyBranchesInspectionBase extends BaseInspection {
private static final int DEFAULT_BRANCH_LIMIT = 3;
/**
* @noinspection PublicField,WeakerAccess
*/
public int m_limit = DEFAULT_BRANCH_LIMIT; //this is public for the DefaultJDOMExternalizer thingy
private static int calculateNumBranches(GrIfStatement statement) {
final GrStatement branch = statement.getElseBranch();
if (branch == null) {
return 1;
}
if (!(branch instanceof GrIfStatement)) {
return 2;
}
return 1 + calculateNumBranches((GrIfStatement) branch);
}
@Override
@NotNull
public String getDisplayName() {
return "If statement with too many branches";
}
@Override
@NotNull
public String getGroupDisplayName() {
return CONTROL_FLOW;
}
private int getLimit() {
return m_limit;
}
@Override
protected String buildErrorString(Object... args) {
final GrIfStatement statement = (GrIfStatement) args[0];
final int branches = calculateNumBranches(statement);
return "'#ref' statement with too many branches (" + branches + ") #loc";
}
@Override
public BaseInspectionVisitor buildVisitor() {
return new Visitor();
}
private class Visitor extends BaseInspectionVisitor {
@Override
public void visitIfStatement(@NotNull GrIfStatement statement) {
super.visitIfStatement(statement);
final PsiElement parent = statement.getParent();
if (parent instanceof GrIfStatement) {
final GrIfStatement parentStatement = (GrIfStatement) parent;
final GrStatement elseBranch = parentStatement.getElseBranch();
if (statement.equals(elseBranch)) {
return;
}
}
final int branches = calculateNumBranches(statement);
if (branches <= getLimit()) {
return;
}
registerStatementError(statement, statement);
}
}
}
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