Merge pull request #2 from moosetechnology/suport-json-printer

Add JSONPrinter

samples/ch/unibe/fame/resources/lib.mse

@@ -0,0 +1,72 @@
+(
+	(FM3.Package (id: 1)
+		(name 'LIB')
+		(classes
+			(FM3.Class (id: 2)
+				(name 'Person')
+				(abstract false)
+				(package (ref: 1))
+				(superclass (ref: Object))
+				(traits (ref: 3))
+				(properties
+					(FM3.Property (id: 4)
+						(name 'name')
+						(class (ref: 2))
+						(container false)
+						(derived false)
+						(multivalued false)
+						(type (ref: String)))
+					(FM3.Property (id: 5)
+						(name 'books')
+						(class (ref: 2))
+						(container false)
+						(derived false)
+						(multivalued true)
+						(opposite (ref: 6))
+						(type (ref: 7)))))
+			(FM3.Class (id: 8)
+				(name 'Library')
+				(abstract false)
+				(package (ref: 1))
+				(superclass (ref: Object))
+				(traits (ref: 3))
+				(properties
+					(FM3.Property (id: 9)
+						(name 'books')
+						(class (ref: 8))
+						(container false)
+						(derived false)
+						(multivalued true)
+						(type (ref: 7)))
+					(FM3.Property (id: 10)
+						(name 'librarian')
+						(class (ref: 8))
+						(container false)
+						(derived false)
+						(multivalued false)
+						(type (ref: 2)))))
+			(FM3.Trait (id: 3)
+				(name 'TNamed')
+				(package (ref: 1)))
+			(FM3.Class (id: 7)
+				(name 'Book')
+				(abstract false)
+				(package (ref: 1))
+				(superclass (ref: Object))
+				(traits (ref: 3))
+				(properties
+					(FM3.Property (id: 6)
+						(name 'authors')
+						(class (ref: 7))
+						(container false)
+						(derived false)
+						(multivalued true)
+						(opposite (ref: 5))
+						(type (ref: 2)))
+					(FM3.Property (id: 11)
+						(name 'title')
+						(class (ref: 7))
+						(container false)
+						(derived false)
+						(multivalued false)
+						(type (ref: String))))))))

src/ch/akuhn/fame/Repository.java

@@ -27,6 +27,7 @@
 import ch.akuhn.fame.MetaRepository.ClassNotMetadescribedException;
 import ch.akuhn.fame.fm3.MetaDescription;
 import ch.akuhn.fame.fm3.PropertyDescription;
+import ch.akuhn.fame.internal.JSONPrinter;
 import ch.akuhn.fame.internal.MSEPrinter;
 import ch.akuhn.fame.internal.RepositoryVisitor;
 import ch.akuhn.fame.parser.Importer;
@@ -225,6 +226,14 @@ public void exportMSE(Appendable stream) {
         this.accept(new MSEPrinter(stream));
     }
 
+    public void exportJSONFile(String filename) {
+        this.exportJSON(Files.openWrite(filename));
+    }
+
+    public void exportJSON(Appendable stream) {
+        this.accept(new JSONPrinter(stream));
+    }
+
     public Collection getElements() {
         return elements;
     }

src/ch/akuhn/fame/internal/JSONPrinter.java

@@ -0,0 +1,135 @@
+package ch.akuhn.fame.internal;
+
+
+/**
+ * This class a helps printing model in JSON
+ *
+ * @author Sabri.BENBRAHIM, Benoit "badetitou" VERHAEGHE
+ */
+public class JSONPrinter extends AbstractPrintClient {
+
+    /**
+     * Constructor
+     *
+     * @param stream in which we have to write
+     */
+    public JSONPrinter(Appendable stream) {
+        super(stream);
+    }
+
+    @Override
+    public void beginAttribute(String name) {
+        lntabs();
+        append("\"");
+        append(name);
+        append("\"");
+        append(":");
+
+    }
+
+    @Override
+    public void beginDocument() {
+        append("[");
+    }
+
+    @Override
+    public void beginElement(String name) {
+        this.indentation++;
+        append("{");
+        lntabs();
+        append("\"FM3\":\"");
+        append(name);
+        append("\",");
+        lntabs();
+    }
+
+    public void beginMultivalue(String name) {
+        append("[");
+    }
+
+    @Override
+    public void directive(String name, String... params) {
+    }
+
+    @Override
+    public void endAttribute(String name) {
+    }
+
+    @Override
+    public void endDocument() {
+        lntabs();
+        append("]");
+        close();
+    }
+
+    @Override
+    public void endElement(String name) {
+        lntabs();
+        append("}");
+        this.indentation--;
+    }
+
+    public void endMultivalue(String name) {
+        append("]");
+    }
+
+    @Override
+    public void primitive(Object value) {
+        append('"');
+        if (value.getClass() == String.class){
+            for (char c : ((String) value).toCharArray()) {
+                if (c == '"') {
+                    append('\\');
+                } else if (c == '\\') {
+                    append('\\');
+                }
+                append(c);
+            }
+        } else {
+            append(value.toString());
+        }
+        append('"');
+    }
+
+    @Override
+    public void reference(int index) {
+        append(" ");
+        append("{");
+        append("\"ref\":");
+        append(" ");
+        append(String.valueOf(index));
+        append("}");
+    }
+
+    @Override
+    public void reference(String name) {
+        append(" ");
+        append("{");
+        append("\"ref\":");
+        append(" ");
+        append("\"");
+        append(name);
+        append("\"");
+        append("}");
+    }
+
+    @Override
+    public void reference(String name, int index) {
+    }
+
+    @Override
+    public void serial(int index) {
+        append("\"id\":");
+        append(String.valueOf(index));
+        append(",");
+    }
+
+    public void printEntitySeparator() {
+        append(",");
+    }
+
+    public void printPropertySeparator() {
+        append(",");
+    }
+
+}