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cn.leancloud.ops.BaseOperation Maven / Gradle / Ivy
package cn.leancloud.ops;
import cn.leancloud.*;
import cn.leancloud.codec.Base64;
import cn.leancloud.types.AVGeoPoint;
import cn.leancloud.utils.LogUtil;
import cn.leancloud.utils.StringUtil;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.annotation.JSONType;
import java.util.*;
@JSONType(deserializer = BaseOperationAdapter.class, serializer = BaseOperationAdapter.class)
public abstract class BaseOperation implements ObjectFieldOperation {
static final AVLogger LOGGER = LogUtil.getLogger(BaseOperation.class);
static final String KEY_OP = "__op";
static final String KEY_OBJECTS = "objects";
static final String KEY_AMOUNT = "amount";
static final String KEY_VALUE = "value";
public static final String KEY_INTERNAL_ID = "__internalId";
public static final String KEY_BODY = "body";
public static final String KEY_PATH = "path";
public static final String KEY_HTTP_METHOD = "method";
protected String op = null;
protected String field = null;
protected Object value = null;
protected boolean isFinal = false;
public BaseOperation(String op, String field, Object value, boolean isFinal) {
this.op = op;
this.field = field;
this.value = value;
this.isFinal = isFinal;
}
public String getOperation() {
return this.op;
}
public String getField() {
return this.field;
}
public Object getValue() {
return this.value;
}
public boolean isFinal() {return this.isFinal;}
public boolean checkCircleReference(Map markMap) {
if (null == markMap) {
return false;
}
if (!(this.value instanceof AVObject)) {
return false;
}
AVObject v = (AVObject)this.value;
if (markMap.containsKey(v) && markMap.get(v) == true) {
return true;
}
boolean rst = v.hasCircleReference(markMap);
markMap.put(v, rst);
return rst;
}
/**
* apply operation to object, in order to generate new attribute value.
*
* @param obj
* @return
*/
public abstract Object apply(Object obj);
public abstract Map encode();
/**
* merge with previous operations.
*
* @param previous
* @return
*/
protected ObjectFieldOperation mergeWithPrevious(ObjectFieldOperation previous) {
return NullOperation.gInstance;
}
public ObjectFieldOperation merge(ObjectFieldOperation other) {
if (null == other || other instanceof NullOperation) {
return this;
}
if (isFinal) {
// ignore all previous operations.
return this;
}
return mergeWithPrevious(other);
}
protected Object concatCollections(Object left, Object right) {
if (null == left || null == right) {
return null == left? right : left;
}
List result = new ArrayList();
if (left instanceof Collection) {
result.addAll((Collection) left);
} else {
result.add(left);
}
if (right instanceof Collection) {
result.addAll((Collection) right);
} else {
result.add(right);
}
try {
if (null != result) {
HashSet uniqueSet = new HashSet(result.size());
for (Object o:result) {
uniqueSet.add(o);
}
result = Arrays.asList(uniqueSet.toArray());
}
} catch (Exception ex) {
LOGGER.w("failed to concat collections.", ex);
}
return result;
}
protected void reportIllegalOperations(ObjectFieldOperation current, ObjectFieldOperation prev) {
LOGGER.w("illegal operations. current=" + current.getClass().getSimpleName() + ", prev=" + prev.getClass().getSimpleName());
}
protected Object encodeObject(Object o) {
return encodeObject(o, false);
}
protected Object encodeObject(Object o, boolean isTop) {
if (null == o) {
return null;
} else if (o instanceof Map) {
return encodeMap((Map)o, isTop);
} else if (o instanceof Collection) {
return encodeCollection((Collection)o, isTop);
} else if (o instanceof AVObject) {
return encodeAVObject((AVObject)o, isTop);
} else if (o instanceof AVGeoPoint) {
return encodeGeoPointer((AVGeoPoint) o);
}else if (o instanceof AVACL) {
return ((AVACL) o).toJSONObject();
} else if (o instanceof AVFile) {
return encodeAVFile((AVFile) o);
} else if (o instanceof Date) {
return encodeDate((Date) o);
} else if (o instanceof byte[]) {
return encodeByteArray((byte[])o);
} else if (o instanceof JSONObject || o instanceof JSONArray) {
return o;
} else {
;
}
return o;
}
protected Object encodeMap(Map map, boolean isTop) {
Map newMap = new HashMap(map.size());
for (Map.Entry entry : map.entrySet()) {
final String key = entry.getKey();
Object o = entry.getValue();
newMap.put(key, encodeObject(o, isTop));
}
return newMap;
}
protected Object encodeCollection(Collection collection, boolean isTop) {
List result = new ArrayList(collection.size());
for (Object o: collection) {
result.add(encodeObject(o, isTop));
}
return result;
}
protected Object encodeAVObject(AVObject o, boolean isTop) {
Map result = new HashMap();
result.put("className", o.getClassName());
if (!StringUtil.isEmpty(o.getObjectId())) {
result.put("objectId", o.getObjectId());
}
if (isTop) {
result.put("__type", "Object");
Map serverData = (Map) encodeMap(o.getServerData(), false);
if (serverData != null && !serverData.isEmpty()) {
result.putAll(serverData);
}
} else {
result.put("__type", "Pointer");
}
return result;
}
protected Object encodeGeoPointer(AVGeoPoint o) {
Map result = new HashMap();
result.put("__type", "GeoPoint");
result.put("latitude", o.getLatitude());
result.put("longitude", o.getLongitude());
return result;
}
protected Object encodeAVFile(AVFile o) {
Map result = new HashMap();
result.put("__type", "_File");
result.put("metaData", o.getMetaData());
result.put("id", o.getName());
return result;
}
protected Object encodeByteArray(byte[] o) {
Map result = new HashMap();
result.put("__type", "Bytes");
result.put("base64", Base64.encodeToString(o, Base64.NO_WRAP));
return result;
}
public static Map encodeDate(Date date) {
Map result = new HashMap();
result.put("__type", "Date");
result.put("iso", StringUtil.stringFromDate(date));
return result;
}
}
