improve path creation

Author: hauner

src/main/kotlin/io/openapiprocessor/core/support/URI.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2020 https://github.com/openapi-processor/openapi-processor-core
+ * PDX-License-Identifier: Apache-2.0
+ */
+
+package io.openapiprocessor.core.support
+
+import java.net.URI
+import java.nio.file.Paths
+
+/**
+ * convert a source string to a valid URI.
+ *
+ * if the source is an uri string it converts it to a URI. If the source has no scheme it assumes
+ * a local path and adds the file scheme (i.e. file:).
+ *
+ * @param source source path or url
+ * @return a URI to the given source
+ */
+fun toURI(source: String): URI {
+    try {
+        val uri = URI(source)
+        if (uri.scheme != null) {
+            return uri
+        }
+
+        // no scheme, assume file path
+        return Paths.get(source)
+            .normalize()
+            .toAbsolutePath()
+            .toUri()
+    } catch (e: Exception) {
+        throw e
+    }
+}

src/main/kotlin/io/openapiprocessor/core/writer/java/ApiWriter.kt

@@ -12,8 +12,8 @@ import io.openapiprocessor.core.model.Api
 import io.openapiprocessor.core.model.Interface
 import io.openapiprocessor.core.model.datatypes.InterfaceDataType
 import io.openapiprocessor.core.model.datatypes.StringEnumDataType
-import io.openapiprocessor.core.support.toURL
 import io.openapiprocessor.core.model.datatypes.ModelDataType
+import io.openapiprocessor.core.support.toURI
 import java.io.BufferedWriter
 import java.io.StringWriter
 import java.io.Writer
@@ -151,7 +151,7 @@ class ApiWriter(
         val root = options.targetDir
         val pkg = listOf(root, apiPkg).joinToString("/")
 
-        val target = Paths.get (toURL(pkg).toURI())
+        val target = Paths.get (toURI(pkg))
         Files.createDirectories(target)
         return target
     }