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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| package com.fizzed.jne; | ||
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| /*- | ||
| * #%L | ||
| * jne | ||
| * %% | ||
| * Copyright (C) 2016 - 2023 Fizzed, Inc | ||
| * %% | ||
| * 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. | ||
| * #L% | ||
| */ | ||
|
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| import java.util.*; | ||
| import java.util.stream.Collectors; | ||
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| public class JavaHomeFinder { | ||
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| static public final JavaDistribution[] DEFAULT_PREFERRED_DISTRIBUTIONS = new JavaDistribution[] { | ||
| JavaDistribution.ZULU, | ||
| JavaDistribution.LIBERICA, | ||
| JavaDistribution.NITRO, | ||
| JavaDistribution.TEMURIN, | ||
| JavaDistribution.MICROSOFT, | ||
| JavaDistribution.CORRETTO | ||
| }; | ||
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| private JavaImageType imageType; | ||
| private Integer minVersion; | ||
| private Integer maxVersion; | ||
| private JavaDistribution distribution; | ||
| private JavaDistribution[] preferredDistributions; | ||
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| public JavaImageType getImageType() { | ||
| return imageType; | ||
| } | ||
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| public JavaHomeFinder jdk() { | ||
| this.imageType = JavaImageType.JDK; | ||
| return this; | ||
| } | ||
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| public JavaHomeFinder jre() { | ||
| this.imageType = JavaImageType.JRE; | ||
| return this; | ||
| } | ||
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| public JavaHomeFinder nik() { | ||
| this.imageType = JavaImageType.NIK; | ||
| return this; | ||
| } | ||
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| public JavaHomeFinder imageType(JavaImageType imageType) { | ||
| this.imageType = imageType; | ||
| return this; | ||
| } | ||
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| public Integer getMinVersion() { | ||
| return minVersion; | ||
| } | ||
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| public JavaHomeFinder minVersion(Integer minVersion) { | ||
| this.minVersion = minVersion; | ||
| return this; | ||
| } | ||
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| public Integer getMaxVersion() { | ||
| return maxVersion; | ||
| } | ||
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| public JavaHomeFinder maxVersion(Integer maxVersion) { | ||
| this.maxVersion = maxVersion; | ||
| return this; | ||
| } | ||
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| public JavaHomeFinder version(Integer version) { | ||
| this.maxVersion = version; | ||
| this.minVersion = version; | ||
| return this; | ||
| } | ||
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| public JavaDistribution getDistribution() { | ||
| return distribution; | ||
| } | ||
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| public JavaHomeFinder distribution(JavaDistribution distribution) { | ||
| this.distribution = distribution; | ||
| return this; | ||
| } | ||
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| public JavaDistribution[] getPreferredDistributions() { | ||
| return preferredDistributions; | ||
| } | ||
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| public JavaHomeFinder preferredDistributions() { | ||
| this.preferredDistributions = DEFAULT_PREFERRED_DISTRIBUTIONS; | ||
| return this; | ||
| } | ||
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| public JavaHomeFinder preferredDistributions(JavaDistribution... preferredDistributions) { | ||
| this.preferredDistributions = preferredDistributions; | ||
| return this; | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return "imageType=" + imageType + | ||
| ", minVersion=" + minVersion + | ||
| ", maxVersion=" + maxVersion + | ||
| ", distribution=" + distribution + | ||
| ", preferredDistributions=" + Arrays.toString(preferredDistributions) + | ||
| '}'; | ||
| } | ||
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| public JavaHome find() throws ResourceNotFoundException { | ||
| final List<JavaHome> javaHomes; | ||
| try { | ||
| javaHomes = JavaHomes.detect(); | ||
| } catch (Exception e) { | ||
| throw new ResourceNotFoundException("Unable to find Java", e); | ||
| } | ||
| return this.find(javaHomes); | ||
| } | ||
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| public JavaHome find(List<JavaHome> javaHomes) throws ResourceNotFoundException { | ||
| return this.tryFind(javaHomes) | ||
| .orElseThrow(() -> new ResourceNotFoundException("Unable to find Java with criteria " + this.toString())); | ||
| } | ||
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| public Optional<JavaHome> tryFind() { | ||
| final List<JavaHome> javaHomes; | ||
| try { | ||
| javaHomes = JavaHomes.detect(); | ||
| } catch (Exception e) { | ||
| return Optional.empty(); | ||
| } | ||
| return this.tryFind(javaHomes); | ||
| } | ||
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| public Optional<JavaHome> tryFind(List<JavaHome> javaHomes) { | ||
| if (javaHomes == null || javaHomes.isEmpty()) { | ||
| return Optional.empty(); | ||
| } | ||
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| // filter our list down by image type, version, etc. (concrete criteria) | ||
| final List<JavaHome> filteredJavaHomes = javaHomes.stream() | ||
| .filter(v -> this.minVersion == null || v.getVersion().getMajor() >= this.minVersion) | ||
| .filter(v -> this.maxVersion == null || v.getVersion().getMajor() <= this.maxVersion) | ||
| .filter(v -> this.imageType == null || v.getImageType() == this.imageType) | ||
| .filter(v -> this.distribution == null || v.getDistribution() == this.distribution) | ||
| .collect(Collectors.toList()); | ||
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| // now, we'll sort what's left by the most recent version (descending) | ||
| filteredJavaHomes.sort((a, b) -> b.getVersion().compareTo(a.getVersion())); | ||
|
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| // by preferred now? | ||
| if (this.preferredDistributions != null) { | ||
| for (JavaDistribution d : this.preferredDistributions) { | ||
| for (JavaHome javaHome : filteredJavaHomes) { | ||
| if (javaHome.getDistribution() == d) { | ||
| return Optional.of(javaHome); | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| // otherwise, return the first | ||
| return filteredJavaHomes.stream().findFirst(); | ||
| } | ||
|
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| } |
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