1 files changed, 70 insertions, 0 deletions
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/model/ValueQuery.java b/src/main/java/pl/edu/mimuw/cloudatlas/model/ValueQuery.java
new file mode 100644
index 0000000..d9cbe4c
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/model/ValueQuery.java
@@ -0,0 +1,70 @@
+package pl.edu.mimuw.cloudatlas.model;
+
+import java.io.ByteArrayInputStream;
+
+import pl.edu.mimuw.cloudatlas.interpreter.query.Absyn.Program;
+import pl.edu.mimuw.cloudatlas.interpreter.query.parser;
+import pl.edu.mimuw.cloudatlas.interpreter.query.Yylex;
+import pl.edu.mimuw.cloudatlas.model.Value;
+
+/**
+ * A class that holds a CloudAtlas query.
+ */
+public class ValueQuery extends Value {
+    // Original source code
+    private String code;
+    // Parsed query
+    private Program query;
+    /**
+     * Constructs a new <code>ValueQuery</code> object.
+     *
+     * @param name the name of the query
+     * @param query the code of the query
+     */
+    public ValueQuery(String query) throws Exception {
+        this.code = query;
+        Yylex lex = new Yylex(new ByteArrayInputStream(query.getBytes()));
+        this.query = (new parser(lex)).pProgram();
+    }
+
+    private ValueQuery() {
+        this.code = null;
+        this.query = null;
+    }
+
+    @Override
+    public Type getType() {
+        return TypePrimitive.QUERY;
+    }
+
+    @Override
+    public boolean isNull() {
+        return query == null || code == null;
+    }
+
+    public Value isEqual(Value value) {
+        sameTypesOrThrow(value, Operation.EQUAL);
+        if(isNull() && value.isNull())
+            return new ValueBoolean(true);
+        else if(isNull() || value.isNull())
+            return new ValueBoolean(false);
+        return new ValueBoolean(code.equals(((ValueQuery)value).code));
+    }
+
+    @Override
+    public Value getDefaultValue() {
+        return new ValueQuery();
+    }
+
+    @Override
+    public Value convertTo(Type type) {
+        switch(type.getPrimaryType()) {
+            case QUERY:
+                return this;
+            case STRING:
+                return isNull() ? ValueString.NULL_STRING : new ValueString(code);
+            default:
+                throw new UnsupportedConversionException(getType(), type);
+        }
+    }
+}