refactor: introduced Resolver

Author: quintesse

src/main/java/org/codejive/jpm/Jpm.java

@@ -91,7 +91,7 @@ public Jpm build() {
      */
     public SyncStats copy(String[] artifactNames, boolean sync)
             throws IOException, DependencyResolutionException {
-        List<Path> files = ResolverUtils.resolveArtifactPaths(artifactNames);
+        List<Path> files = Resolver.create(artifactNames).resolvePaths();
         return FileUtils.syncArtifacts(files, directory, noLinks, !sync);
     }
 
@@ -134,7 +134,7 @@ public SyncStats install(String[] artifactNames)
         AppInfo appInfo = AppInfo.read();
         String[] artifacts = getArtifacts(artifactNames, appInfo);
         if (artifacts.length > 0) {
-            List<Path> files = ResolverUtils.resolveArtifactPaths(artifacts);
+            List<Path> files = Resolver.create(artifacts).resolvePaths();
             SyncStats stats = FileUtils.syncArtifacts(files, directory, noLinks, true);
             if (artifactNames.length > 0) {
                 for (String dep : artifactNames) {
@@ -165,7 +165,7 @@ public List<Path> path(String[] artifactNames)
         AppInfo appInfo = AppInfo.read();
         String[] deps = getArtifacts(artifactNames, appInfo);
         if (deps.length > 0) {
-            return ResolverUtils.resolveArtifactPaths(deps);
+            return Resolver.create(deps).resolvePaths();
         } else {
             return Collections.emptyList();
         }

src/main/java/org/codejive/jpm/Main.java

@@ -1,10 +1,10 @@
 // spotless:off Dependencies for JBang
-//DEPS eu.maveniverse.maven.mima:context:2.4.15 eu.maveniverse.maven.mima.runtime:standalone-static:2.4.15
-//DEPS info.picocli:picocli:4.7.6
-//DEPS org.yaml:snakeyaml:2.3
-//DEPS org.jline:jline-console-ui:3.29.0 org.jline:jline-terminal-jni:3.29.0
-//DEPS org.slf4j:slf4j-api:2.0.13 org.slf4j:slf4j-simple:2.0.13
-//SOURCES Jpm.java json/AppInfo.java util/FileUtils.java util/ResolverUtils.java util/ScriptUtils.java
+//DEPS eu.maveniverse.maven.mima:context:2.4.34 eu.maveniverse.maven.mima.runtime:standalone-static:2.4.34
+//DEPS info.picocli:picocli:4.7.7
+//DEPS org.yaml:snakeyaml:2.4
+//DEPS org.jline:jline-console-ui:3.30.5 org.jline:jline-terminal-jni:3.30.5
+//DEPS org.slf4j:slf4j-api:2.0.17 org.slf4j:slf4j-simple:2.0.17
+//SOURCES Jpm.java json/AppInfo.java util/FileUtils.java util/Resolver.java util/ScriptUtils.java
 //SOURCES util/SearchResult.java util/SearchUtils.java util/SyncStats.java util/Version.java
 // spotless:on
 

src/main/java/org/codejive/jpm/util/ResolverUtils.java renamed to src/main/java/org/codejive/jpm/util/Resolver.java

@@ -4,10 +4,6 @@
 import eu.maveniverse.maven.mima.context.ContextOverrides;
 import eu.maveniverse.maven.mima.context.Runtime;
 import eu.maveniverse.maven.mima.context.Runtimes;
-import java.nio.file.Path;
-import java.util.Arrays;
-import java.util.List;
-import java.util.stream.Collectors;
 import org.eclipse.aether.artifact.Artifact;
 import org.eclipse.aether.artifact.DefaultArtifact;
 import org.eclipse.aether.collection.CollectRequest;
@@ -18,22 +14,34 @@
 import org.eclipse.aether.resolution.DependencyResult;
 import org.eclipse.aether.util.artifact.JavaScopes;
 
-/** Utility class for resolving Maven artifacts. */
-public class ResolverUtils {
-    /**
-     * Resolves the paths of the given artifacts. Handles parsing and resolving of artifacts and
-     * extracts their paths.
-     *
-     * @param artifactNames the artifacts to resolve as an array of strings in the format
-     *     "groupId:artifactId:version"
-     * @return the paths of the resolved artifacts
-     * @throws DependencyResolutionException if an error occurs while resolving the artifacts
-     */
-    public static List<Path> resolveArtifactPaths(String[] artifactNames)
-            throws DependencyResolutionException {
-        List<Artifact> artifacts = parseArtifacts(artifactNames);
-        List<ArtifactResult> resolvedArtifacts = resolveArtifacts(artifacts);
-        return resolvedArtifacts.stream()
+import java.nio.file.Path;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class Resolver {
+    private final List<Artifact> artifacts;
+
+    private List<ArtifactResult> resolvedArtifacts;
+
+    public static Resolver create(String[] artifactNames) {
+        return new Resolver(artifactNames);
+    }
+
+    private Resolver(String[] artifactNames) {
+        artifacts = parseArtifacts(artifactNames);
+    }
+
+    public List<ArtifactResult> resolve() throws DependencyResolutionException {
+        if (resolvedArtifacts == null) {
+            resolvedArtifacts = resolveArtifacts(artifacts);
+        }
+        return resolvedArtifacts;
+    }
+
+    public List<Path> resolvePaths() throws DependencyResolutionException {
+        List<ArtifactResult> ras = resolve();
+        return ras.stream()
                 .map(ar -> ar.getArtifact().getFile().toPath())
                 .collect(Collectors.toList());
     }