service: Add objects for deserializing sstable_info json

Objects + serial logic to automate the transform of
scylla REST json object for sstable_info into
compositedata that can be consumed by nodetool

src/main/java/org/apache/cassandra/service/PerTableSSTableInfo.java

@@ -0,0 +1,66 @@
+package org.apache.cassandra.service;
+
+import static com.sun.jmx.mbeanserver.MXBeanMappingFactory.DEFAULT;
+
+import java.io.InvalidObjectException;
+import java.util.List;
+
+import javax.management.openmbean.CompositeData;
+import javax.management.openmbean.OpenDataException;
+import javax.xml.bind.annotation.XmlRootElement;
+
+import com.sun.jmx.mbeanserver.MXBeanMapping;
+
+@SuppressWarnings("restriction")
+@XmlRootElement
+public class PerTableSSTableInfo {
+    private static final MXBeanMapping mxBeanMapping;
+
+    static {
+        try {
+            mxBeanMapping = DEFAULT.mappingForType(PerTableSSTableInfo.class, DEFAULT);
+        } catch (OpenDataException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private String keyspace;
+    private List<SSTableInfo> sstables;
+    private String table;
+
+    public String getTable() {
+        return table;
+    }
+
+    public void setTable(String table) {
+        this.table = table;
+    }
+
+    public String getKeyspace() {
+        return keyspace;
+    }
+
+    public void setKeyspace(String keyspace) {
+        this.keyspace = keyspace;
+    }
+
+    public List<SSTableInfo> getSSTables() {
+        return sstables;
+    }
+
+    public void setSSTableInfos(List<SSTableInfo> sstableInfos) {
+        this.sstables = sstableInfos;
+    }
+
+    public CompositeData toCompositeData() {
+        try {
+            return (CompositeData) mxBeanMapping.toOpenValue(this);
+        } catch (OpenDataException e) {
+            throw new Error(e); // should not reach.
+        }
+    }
+
+    public static PerTableSSTableInfo from(CompositeData data) throws InvalidObjectException {
+        return (PerTableSSTableInfo) mxBeanMapping.fromOpenValue(data);
+    }
+}

src/main/java/org/apache/cassandra/service/SSTableInfo.java

@@ -0,0 +1,143 @@
+package org.apache.cassandra.service;
+
+import java.util.Collections;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.scylladb.jmx.utils.DateXmlAdapter;
+
+public class SSTableInfo {
+    private long size;
+
+    @JsonProperty("data_size")
+    private long dataSize;
+
+    @JsonProperty("index_size")
+    private long indexSize;
+
+    @JsonProperty("filter_size")
+    private long filterSize;
+
+    @XmlJavaTypeAdapter(type = Date.class, value = DateXmlAdapter.class)
+    private Date timestamp;
+
+    private long generation;
+
+    private long level;
+
+    private String version;
+
+    private Map<String, String> properties;
+
+    public void setProperties(Map<String, String> properties) {
+        this.properties = properties;
+    }
+
+    @JsonIgnore
+    private Map<String, Map<String, String>> extendedProperties;
+
+    public String getVersion() {
+        return version;
+    }
+
+    public void setVersion(String version) {
+        this.version = version;
+    }
+
+    public long getSize() {
+        return size;
+    }
+
+    public void setSize(long size) {
+        this.size = size;
+    }
+
+    public long getDataSize() {
+        return dataSize;
+    }
+
+    public void setDataSize(long dataSize) {
+        this.dataSize = dataSize;
+    }
+
+    public long getIndexSize() {
+        return indexSize;
+    }
+
+    public void setIndexSize(long indexSize) {
+        this.indexSize = indexSize;
+    }
+
+    public long getFilterSize() {
+        return filterSize;
+    }
+
+    public void setFilterSize(long filterSize) {
+        this.filterSize = filterSize;
+    }
+
+    public Date getTimestamp() {
+        return timestamp;
+    }
+
+    public void setTimestamp(Date timestamp) {
+        this.timestamp = timestamp;
+    }
+
+    public long getGeneration() {
+        return generation;
+    }
+
+    public void setGeneration(long generation) {
+        this.generation = generation;
+    }
+
+    public long getLevel() {
+        return level;
+    }
+
+    public void setLevel(long level) {
+        this.level = level;
+    }
+
+    public Map<String, String> getProperties() {
+        return properties;
+    }
+
+    public Map<String, Map<String, String>> getExtendedProperties() {
+        return extendedProperties;
+    }
+
+    public void setExtendedProperties(Map<String, Map<String, String>> extendedProperties) {
+        this.extendedProperties = extendedProperties;
+    }
+
+    @JsonProperty("extended_properties")
+    private void unpackNested(List<Map<String, Object>> properties) {
+        Map<String, Map<String, String>> result = new HashMap<String, Map<String, String>>();
+
+        for (Map<String, Object> map : properties) {
+            Object name = map.get("group");
+            if (name != null) {
+                Map<String, String> dst = new HashMap<>();
+                List<?> value = (List<?>) map.get("attributes");
+                for (Object v : value) {
+                    Map<?, ?> subMap = (Map<?, ?>) v;
+                    dst.put(String.valueOf(subMap.get("key")), String.valueOf(subMap.get("value")));
+                }
+                result.put(String.valueOf(name), dst);
+            } else {
+                for (Map.Entry<String, Object> e : map.entrySet()) {
+                    result.put(e.getKey(), Collections.singletonMap(String.valueOf(e.getValue()), ""));
+                }
+            }
+        }
+        extendedProperties = result;
+    }
+}