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[java-api] LanguageLevel#getLevel

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GitOrigin-RevId: e79c14ea061a1dbf5a291bfd6b8d030c1fb935ee
This commit is contained in:
Tagir Valeev
2023-12-18 11:53:22 +01:00
committed by intellij-monorepo-bot
parent 26511f7ed1
commit de78307927
1 changed files with 20 additions and 3 deletions
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23
java/java-frontback-psi-api/src/com/intellij/pom/java/LanguageLevel.java
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@@ -4,14 +4,18 @@ package com.intellij.pom.java;
import com.intellij.core.JavaPsiBundle;
import com.intellij.openapi.projectRoots.JavaSdkVersion;
import com.intellij.openapi.util.Key;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.util.lang.JavaVersion;
import org.jetbrains.annotations.ApiStatus;
import org.jetbrains.annotations.Nls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Map;
import java.util.Objects;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.Stream;
/**
* Represents a language level (i.e. features available) of a Java code.
@@ -50,7 +54,7 @@ public enum LanguageLevel {
// Unsupported
// Marked as obsolete to draw attention, as they should not be normally used in code or in tests,
// except the tests that explicitly test the obsolete levels
@ApiStatus.Obsolete
JDK_17_PREVIEW(17, JDK_20_PREVIEW),
@ApiStatus.Obsolete
@@ -68,6 +72,9 @@ public enum LanguageLevel {
private final JavaVersion myVersion;
private final boolean myPreview;
private final @Nullable LanguageLevel myAlias;
private static final Map<Integer, LanguageLevel> ourStandardVersions =
Stream.of(values()).filter(ver -> !ver.isPreview())
.collect(Collectors.toMap(ver -> ver.myVersion.feature, Function.identity()));
LanguageLevel(Supplier<@Nls String> presentableTextSupplier, int major) {
this(presentableTextSupplier, major, null);
@@ -127,7 +134,7 @@ public enum LanguageLevel {
*/
public @NotNull LanguageLevel getNonPreviewLevel() {
if (!myPreview) return this;
return valueOf(StringUtil.substringBefore(name(), "_PREVIEW"));
return Objects.requireNonNull(ourStandardVersions.get(myVersion.feature));
}
@NotNull
@@ -161,5 +168,15 @@ public enum LanguageLevel {
return null;
}
/**
* @param feature major Java language level number
* @return a {@link LanguageLevel} constant that correspond to the specified level (non-preview).
* Returns null for unknown/unsupported input. May return {@link #JDK_X} if language level is one level
* higher than maximal supported.
*/
public static @Nullable LanguageLevel forFeature(int feature) {
return ourStandardVersions.get(feature);
}
public static final Key<LanguageLevel> FILE_LANGUAGE_LEVEL_KEY = Key.create("FORCE_LANGUAGE_LEVEL");
}