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more friendly find-methods

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This commit is contained in:
Max Medvedev
2015-01-20 13:38:57 +03:00
parent bc619a322b
commit 5cb55dc809
1 changed files with 8 additions and 9 deletions
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platform/core-impl/src/com/intellij/extapi/psi/ASTDelegatePsiElement.java
+8 -9
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@@ -176,18 +176,17 @@ public abstract class ASTDelegatePsiElement extends PsiElementBase {
}
@Nullable
protected PsiElement findChildByType(IElementType type) {
protected <T extends PsiElement> T findChildByType(IElementType type) {
ASTNode node = getNode().findChildByType(type);
return node == null ? null : node.getPsi();
return node == null ? null : (T)node.getPsi();
}
@Nullable
protected PsiElement findLastChildByType(IElementType type) {
protected <T extends PsiElement> T findLastChildByType(IElementType type) {
PsiElement child = getLastChild();
while (child != null) {
final ASTNode node = child.getNode();
if (node != null && node.getElementType() == type) return child;
if (node != null && node.getElementType() == type) return (T)child;
child = child.getPrevSibling();
}
return null;
@@ -196,14 +195,14 @@ public abstract class ASTDelegatePsiElement extends PsiElementBase {
@NotNull
protected PsiElement findNotNullChildByType(IElementType type) {
return notNullChild(findChildByType(type));
protected <T extends PsiElement> T findNotNullChildByType(IElementType type) {
return notNullChild(this.<T>findChildByType(type));
}
@Nullable
protected PsiElement findChildByType(TokenSet type) {
protected <T extends PsiElement> T findChildByType(TokenSet type) {
ASTNode node = getNode().findChildByType(type);
return node == null ? null : node.getPsi();
return node == null ? null : (T)node.getPsi();
}
@NotNull