Merge pull request #4 from olenagerasimova/1-init

feat: initialise podspec

src/main/java/com/artipie/cocoa/metadata/Podspec.java

@@ -4,13 +4,19 @@
  */
 package com.artipie.cocoa.metadata;
 
+import com.artipie.asto.misc.UncheckedIOScalar;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.StringReader;
 import java.net.URI;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
+import javax.json.JsonException;
 import javax.json.JsonObject;
 import javax.json.JsonValue;
+import org.testng.reporters.Files;
 
 /**
  * Cocoa PODSPEC metadata.
@@ -65,6 +71,24 @@ public interface Podspec {
      */
     String summary();
 
+    /**
+     * Create {@link Podspec} instance from podspec file input stream.
+     * @param input Podspec file input stream
+     * @return Instance of {@link  Podspec}
+     * @throws IOException On error
+     */
+    @SuppressWarnings("PMD.ProhibitPublicStaticMethods")
+    static Podspec initiate(final InputStream input) throws IOException {
+        final String data = Files.readFile(input);
+        Podspec res;
+        try {
+            res = new Json(javax.json.Json.createReader(new StringReader(data)).readObject());
+        } catch (final JsonException err) {
+            res = new Ruby(data);
+        }
+        return res;
+    }
+
     /**
      * Podspec in ruby format.
      * @since 0.1
@@ -84,6 +108,14 @@ public Ruby(final String data) {
             this.data = data;
         }
 
+        /**
+         * Ctor.
+         * @param input Input stream with ruby podspec
+         */
+        public Ruby(final InputStream input) {
+            this(new UncheckedIOScalar<>(() -> Files.readFile(input)).value());
+        }
+
         @Override
         public String name() {
             return this.getStringValue(".name");
@@ -188,6 +220,22 @@ public Json(final JsonObject data) {
             this.data = data;
         }
 
+        /**
+         * Ctor from spec string.
+         * @param data Json podspec string data
+         */
+        public Json(final String data) {
+            this(javax.json.Json.createReader(new StringReader(data)).readObject());
+        }
+
+        /**
+         * Ctor from spec input stream.
+         * @param data Json podspec input stream
+         */
+        public Json(final InputStream data) {
+            this(javax.json.Json.createReader(data).readObject());
+        }
+
         @Override
         public String name() {
             return this.data.getString("name");

src/test/java/com/artipie/cocoa/metadata/PodspecTest.java

@@ -0,0 +1,34 @@
+/*
+ * The MIT License (MIT) Copyright (c) 2020-2022 artipie.com
+ * https://github.com/cocoa-adapter/artipie/LICENSE.txt
+ */
+package com.artipie.cocoa.metadata;
+
+import com.artipie.asto.test.TestResource;
+import java.io.IOException;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.core.IsInstanceOf;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Test for {@link Podspec}.
+ * @since 0.1
+ */
+class PodspecTest {
+
+    @Test
+    void initializesRuby() throws IOException {
+        MatcherAssert.assertThat(
+            Podspec.initiate(new TestResource("example.spec").asInputStream()),
+            new IsInstanceOf(Podspec.Ruby.class)
+        );
+    }
+
+    @Test
+    void initializesJson() throws IOException {
+        MatcherAssert.assertThat(
+            Podspec.initiate(new TestResource("example.spec.json").asInputStream()),
+            new IsInstanceOf(Podspec.Json.class)
+        );
+    }
+}