Allow spaces and apostrophes in dimensions

Change-Id: I0f6a00496e65eeadb946849e68107321310a1a11

java/monasca-common-model/src/main/java/monasca/common/model/alarm/AlarmSubExpressionListener.java

@@ -82,8 +82,26 @@ class AlarmSubExpressionListener extends AlarmExpressionBaseListener {
 
   @Override
   public void enterDimension(AlarmExpressionParser.DimensionContext ctx) {
-    String dimensionName = ctx.getChild(0).getText();
-    if (dimensions.put(dimensionName, ctx.getChild(2).getText()) != null)
+    StringBuilder dimensionName = new StringBuilder();
+    dimensionName.append(ctx.getChild(0).getText());
+    int i = 1;
+    while (!ctx.getChild(i).getText().equals("=")) {
+      dimensionName.append(' ');
+      dimensionName.append(ctx.getChild(i).getText());
+      i++;
+    }
+    // move past the '=' token
+    i++;
+
+    StringBuilder dimensionValue = new StringBuilder();
+    dimensionValue.append(ctx.getChild(i).getText());
+    i++;
+    while (i < ctx.getChildCount()) {
+      dimensionValue.append(' ');
+      dimensionValue.append(ctx.getChild(i).getText());
+      i++;
+    }
+    if (dimensions.put(dimensionName.toString(), dimensionValue.toString()) != null)
       throw new IllegalArgumentException("More than one value was given for dimension "
           + dimensionName);
   }

java/monasca-common-model/src/main/resources/monasca/common/model/alarm/AlarmExpression.g4

@@ -97,7 +97,7 @@ dimensionList
     ;
 
 dimension
-    : txt '=' txt
+    : (txt)+ '=' (txt)+
     ;
 
 keyword
@@ -210,7 +210,7 @@ DECIMAL
     ;
 
 TXT
-  : ~('\'' | '}' | '{' | '&' | '|' | '>' | '<' | '=' | ',' | ')' | '(' | ' ' | '"' )+
+  : ~('}' | '{' | '&' | '|' | '>' | '<' | '=' | ',' | ')' | '(' | ' ' | '"' )+
   ;
 
 STRING

java/monasca-common-model/src/test/java/monasca/common/model/alarm/AlarmExpressionTest.java

@@ -24,11 +24,12 @@ import java.util.List;
 import org.testng.annotations.Test;
 
 import com.google.common.collect.ImmutableMap;
+
 import monasca.common.model.metric.MetricDefinition;
 
 @Test
 public class AlarmExpressionTest {
-  private final String restrictedChars = "(){}&|<>='\",";
+  private final String restrictedChars = "(){}&|<>=\",";
 
     public void shouldParseExpression() {
         AlarmExpression expr = new AlarmExpression(
@@ -251,6 +252,26 @@ public class AlarmExpressionTest {
       assertEquals(alarm1.getMetricDefinition(), expected1);
     }
 
+    public void shouldParseDimensionsWithSpaces() {
+      AlarmExpression[] expr_list = {
+          new AlarmExpression("test_metric{this_is_a_test=this is a test} > 10"),
+          new AlarmExpression("test_metric{this is also a test = this_is_also_a_test} > 10")
+      };
+      MetricDefinition[] expected_list = {
+          new MetricDefinition("test_metric", ImmutableMap.<String,String>builder()
+              .put("this_is_a_test", "this is a test")
+              .build()),
+          new MetricDefinition("test_metric", ImmutableMap.<String,String>builder()
+              .put("this is also a test", "this_is_also_a_test")
+              .build())
+      };
+
+      for(int i = 0; i < expr_list.length; i++) {
+        AlarmSubExpression expr = expr_list[i].getSubExpressions().get(0);
+        assertEquals(expr.getMetricDefinition(), expected_list[i]);
+      }
+    }
+
     public void shouldFailWithRestrictedChars() {
       String[] expressions = {"%cmetric{foo=bar,metric_name=mem} > 4",
                               "me%ctric{foo=bar,metric_name=mem} > 4",