refactor(stack): Move the model classes into a dedicated file

While at it also extract a function for the parsing of the model.

Signed-off-by: Frank Viernau <frank_viernau@epam.com>

plugins/package-managers/stack/src/main/kotlin/Model.kt

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2017-2024 The ORT Project Authors (see <https://github.com/oss-review-toolkit/ort/blob/main/NOTICE>)
+ *
+ * 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
+ *
+ *     https://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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * License-Filename: LICENSE
+ */
+
+package org.ossreviewtoolkit.plugins.packagemanagers.stack
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties
+import com.fasterxml.jackson.module.kotlin.readValue
+
+import org.ossreviewtoolkit.model.jsonMapper
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+internal data class Location(
+    val url: String,
+    val type: String
+)
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+internal data class Dependency(
+    val name: String,
+    val version: String,
+    val license: String,
+    val location: Location? = null,
+    val dependencies: List<String> = emptyList()
+)
+
+internal fun String.parseDependencies() = jsonMapper.readValue<List<Dependency>>(this)

plugins/package-managers/stack/src/main/kotlin/Stack.kt

@@ -19,9 +19,6 @@
 
 package org.ossreviewtoolkit.plugins.packagemanagers.stack
 
-import com.fasterxml.jackson.annotation.JsonIgnoreProperties
-import com.fasterxml.jackson.module.kotlin.readValue
-
 import java.io.File
 import java.io.IOException
 
@@ -42,7 +39,6 @@ import org.ossreviewtoolkit.model.VcsInfo
 import org.ossreviewtoolkit.model.VcsType
 import org.ossreviewtoolkit.model.config.AnalyzerConfiguration
 import org.ossreviewtoolkit.model.config.RepositoryConfiguration
-import org.ossreviewtoolkit.model.jsonMapper
 import org.ossreviewtoolkit.model.utils.toPurl
 import org.ossreviewtoolkit.utils.common.CommandLineTool
 import org.ossreviewtoolkit.utils.common.ProcessCapture
@@ -79,21 +75,6 @@ class Stack(
         ) = Stack(type, analysisRoot, analyzerConfig, repoConfig)
     }
 
-    @JsonIgnoreProperties(ignoreUnknown = true)
-    private data class Location(
-        val url: String,
-        val type: String
-    )
-
-    @JsonIgnoreProperties(ignoreUnknown = true)
-    private data class Dependency(
-        val name: String,
-        val version: String,
-        val license: String,
-        val location: Location? = null,
-        val dependencies: List<String> = emptyList()
-    )
-
     override fun command(workingDir: File?) = "stack"
 
     override fun transformVersion(output: String) =
@@ -143,7 +124,7 @@ class Stack(
                 "ls", "dependencies", "json", "--global-hints", *scopeOptions.toTypedArray()
             ).stdout
 
-            return jsonMapper.readValue(dependenciesJson)
+            return dependenciesJson.parseDependencies()
         }
 
         val allDependencies = mutableSetOf<Dependency>()