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do not allocate list until it is really needed

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Maxim.Mossienko
2014-08-06 22:32:08 +02:00
parent b6f47a3ca8
commit 62e62eba57
1 changed files with 9 additions and 10 deletions
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19
java/java-structure-view/src/com/intellij/ide/structureView/impl/java/PsiMethodTreeElement.java
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@@ -31,10 +31,7 @@ import com.intellij.util.Function;
import com.intellij.util.ui.UIUtil;
import org.jetbrains.annotations.NotNull;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.*;
import static com.intellij.psi.util.PsiFormatUtilBase.*;
@@ -47,20 +44,22 @@ public class PsiMethodTreeElement extends JavaClassTreeElementBase<PsiMethod> im
@Override
@NotNull
public Collection<StructureViewTreeElement> getChildrenBase() {
final ArrayList<StructureViewTreeElement> result = new ArrayList<StructureViewTreeElement>();
final List<StructureViewTreeElement> emptyResult = Collections.emptyList();
final PsiMethod element = getElement();
if (element == null || element instanceof SyntheticElement) return result;
if (element == null || element instanceof SyntheticElement) return emptyResult;
final PsiFile psiFile = element.getContainingFile();
if (psiFile == null || psiFile instanceof PsiCompiledElement) return result;
if (psiFile == null || psiFile instanceof PsiCompiledElement) return emptyResult;
final TextRange range = element.getTextRange();
if (range == null) return result;
if (range == null) return emptyResult;
final String fileText = psiFile.getText();
if (fileText == null) return result;
if (fileText == null) return emptyResult;
if (!range.substring(fileText).contains(PsiKeyword.CLASS)) return result;
if (!range.substring(fileText).contains(PsiKeyword.CLASS)) return emptyResult;
final ArrayList<StructureViewTreeElement> result = new ArrayList<StructureViewTreeElement>();
element.accept(new JavaRecursiveElementWalkingVisitor(){
@Override public void visitClass(PsiClass aClass) {