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/*
* Copyright 2010-2013 Bas Leijdekkers
*
* 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 com.siyeh.ig.psiutils;
import com.intellij.psi.*;
import com.intellij.psi.util.PsiTreeUtil;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.Nullable;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
public class FormatUtils {
/**
* @noinspection StaticCollection
*/
@NonNls
public static final Set<String> formatMethodNames = new HashSet<String>(2);
/**
* @noinspection StaticCollection
*/
public static final Set<String> formatClassNames = new HashSet<String>(4);
static {
formatMethodNames.add("format");
formatMethodNames.add("printf");
formatClassNames.add("java.io.PrintWriter");
formatClassNames.add("java.io.PrintStream");
formatClassNames.add("java.util.Formatter");
formatClassNames.add(CommonClassNames.JAVA_LANG_STRING);
}
private FormatUtils() {}
public static boolean isFormatCall(PsiMethodCallExpression expression) {
return isFormatCall(expression, Collections.<String>emptyList(), Collections.<String>emptyList());
}
public static boolean isFormatCall(PsiMethodCallExpression expression, List<String> optionalMethods, List<String> optionalClasses) {
final PsiReferenceExpression methodExpression = expression.getMethodExpression();
final String name = methodExpression.getReferenceName();
if (!formatMethodNames.contains(name) && !optionalMethods.contains(name)) {
return false;
}
final PsiMethod method = expression.resolveMethod();
if (method == null) {
return false;
}
final PsiClass containingClass = method.getContainingClass();
if (containingClass == null) {
return false;
}
final String className = containingClass.getQualifiedName();
return formatClassNames.contains(className) || optionalClasses.contains(className);
}
public static boolean isFormatCallArgument(PsiElement element) {
final PsiExpressionList expressionList =
PsiTreeUtil.getParentOfType(element, PsiExpressionList.class, true, PsiCodeBlock.class, PsiStatement.class, PsiClass.class);
if (expressionList == null) {
return false;
}
final PsiElement parent = expressionList.getParent();
return parent instanceof PsiMethodCallExpression && isFormatCall((PsiMethodCallExpression)parent);
}
@Nullable
public static PsiExpression getFormatArgument(PsiExpressionList argumentList) {
final PsiExpression[] arguments = argumentList.getExpressions();
if (arguments.length == 0) {
return null;
}
final PsiExpression firstArgument = arguments[0];
final PsiType type = firstArgument.getType();
if (type == null) {
return null;
}
final int formatArgumentIndex;
if ("java.util.Locale".equals(type.getCanonicalText()) && arguments.length > 1) {
formatArgumentIndex = 1;
}
else {
formatArgumentIndex = 0;
}
return arguments[formatArgumentIndex];
}
}
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