list available cinder zone

Author: Jeff Hu

core/src/main/java/org/openstack4j/openstack/storage/block/domain/ExtAvailabilityZone.java

@@ -0,0 +1,73 @@
+package org.openstack4j.openstack.storage.block.domain;
+
+import static com.google.common.base.Objects.toStringHelper;
+
+import java.util.List;
+
+import org.openstack4j.openstack.common.ListResult;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonRootName;
+
+public class ExtAvailabilityZone implements AvailabilityZone {
+
+    private static final long serialVersionUID = 1L;
+    
+    ExtZoneState zoneState;
+    String zoneName;
+        
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public ZoneState getZoneState() {
+        return zoneState;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public String getZoneName() {
+        return zoneName;
+    }
+
+
+    @JsonRootName("zoneState")
+    static class ExtZoneState implements ZoneState {
+        private static final long serialVersionUID = 1L;
+        
+        boolean available;
+
+        /**
+         * {@inheritDoc}
+         */
+        @Override
+        public boolean getAvailable() {
+            return available;
+        }
+        
+        @Override
+        public String toString() {
+            return toStringHelper(this).omitNullValues()
+                     .add("available", available)
+                     .toString();
+        }
+    }
+    
+    
+    public static class AvailabilityZones extends ListResult<ExtAvailabilityZone> {
+
+        private static final long serialVersionUID = 1L;
+        
+        @JsonProperty("availabilityZoneInfo")
+        private List<ExtAvailabilityZone> result;
+
+        @Override
+        protected List<ExtAvailabilityZone> value() {
+            return result;
+        }
+
+        
+    }
+}