Add MapReaders and CartoReaders SPI

Author: jericks

src/main/groovy/geoscript/carto/io/CartoReader.groovy

@@ -8,6 +8,12 @@ import geoscript.carto.CartoBuilder
  */
 interface CartoReader {
 
+    /**
+     * Get the name of the CartoReader
+     * @return The name
+     */
+    String getName()
+
     /**
      * Read a CartoBuilder from a String
      * @param str A String

src/main/groovy/geoscript/carto/io/CartoReaders.groovy

@@ -0,0 +1,31 @@
+package geoscript.carto.io
+
+import geoscript.render.io.MapReader
+
+/**
+ * A Utility for finding all registered CartoReaders.
+ * @author Jared Erickson
+ */
+class CartoReaders {
+
+    /**
+     * Get a List of all CartoReaders
+     * @return A List of CartoReaders
+     */
+    static List<Reader> list() {
+        ServiceLoader.load(CartoReader).iterator().collect()
+    }
+
+    /**
+     * Find a CartoReader by name (json, xml)
+     * @param name The name (json, xml)
+     * @return A CartoReader or null
+     */
+    static CartoReader find(String name) {
+        list().find{ CartoReader reader ->
+            String readerName = reader.class.simpleName
+            readerName.toLowerCase().startsWith(name.toLowerCase())
+        }
+    }
+
+}

src/main/groovy/geoscript/carto/io/JsonCartoReader.groovy

@@ -34,6 +34,11 @@ import java.text.SimpleDateFormat
  */
 class JsonCartoReader implements CartoReader {
 
+    @Override
+    String getName() {
+        "json"
+    }
+
     @Override
     CartoBuilder read(String str) {
         JsonSlurper jsonSlurper = new JsonSlurper()

src/main/groovy/geoscript/carto/io/XmlCartoReader.groovy

@@ -35,6 +35,11 @@ import java.text.SimpleDateFormat
  */
 class XmlCartoReader implements CartoReader {
 
+    @Override
+    String getName() {
+        "xml"
+    }
+
     @Override
     CartoBuilder read(String str) {
         XmlSlurper xmlSlurper = new XmlSlurper()

src/main/groovy/geoscript/render/io/JsonMapReader.groovy

@@ -29,6 +29,11 @@ import groovy.json.JsonSlurper
  */
 class JsonMapReader implements MapReader {
 
+    @Override
+    String getName() {
+        "json"
+    }
+
     @Override
     GMap read(String str) {
         JsonSlurper jsonSlurper = new JsonSlurper()

src/main/groovy/geoscript/render/io/MapReader.groovy

@@ -8,6 +8,12 @@ import geoscript.render.Map as GMap
  */
 interface MapReader {
 
+    /**
+     * The name of the MapReader
+     * @return The name
+     */
+    String getName()
+
     /**
      * Read a Map from a configuration string.
      * @param str The string

src/main/groovy/geoscript/render/io/MapReaders.groovy

@@ -0,0 +1,29 @@
+package geoscript.render.io
+
+/**
+ * A Utility for finding all registered MapReaders.
+ * @author Jared Erickson
+ */
+class MapReaders {
+
+    /**
+     * Get a List of all MapReaders
+     * @return A List of MapReaders
+     */
+    static List<Reader> list() {
+        ServiceLoader.load(MapReader).iterator().collect()
+    }
+
+    /**
+     * Find a MapReader by name (json, xml)
+     * @param name The name (json, xml)
+     * @return A MapReader or null
+     */
+    static MapReader find(String name) {
+        list().find{ MapReader reader ->
+            String readerName = reader.class.simpleName
+            readerName.toLowerCase().startsWith(name.toLowerCase())
+        }
+    }
+
+}

src/main/groovy/geoscript/render/io/XmlMapReader.groovy

@@ -36,6 +36,11 @@ import groovy.xml.slurpersupport.GPathResult
  */
 class XmlMapReader implements MapReader {
 
+    @Override
+    String getName() {
+        "xml"
+    }
+
     @Override
     GMap read(String str) {
         XmlSlurper xmlSlurper = new XmlSlurper()

src/main/resources/META-INF/services/geoscript.carto.io.CartoReader

@@ -0,0 +1,2 @@
+geoscript.carto.io.JsonCartoReader
+geoscript.carto.io.XmlCartoReader

src/main/resources/META-INF/services/geoscript.render.io.MapReader

@@ -0,0 +1,2 @@
+geoscript.render.io.XmlMapReader
+geoscript.render.io.JsonMapReader