apm-sniffer/apm-sdk-plugin/mongodb-3.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/mongodb/v3/support/MongoOperationHelper.java [73:142]:
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            return limitFilter(filter.toString());
        } else if (obj instanceof ListCollectionsOperation) {
            BsonDocument filter = ((ListCollectionsOperation) obj).getFilter();
            return limitFilter(filter.toString());
        } else if (obj instanceof MapReduceWithInlineResultsOperation) {
            BsonDocument filter = ((MapReduceWithInlineResultsOperation) obj).getFilter();
            return limitFilter(filter.toString());
        } else if (obj instanceof DeleteOperation) {
            List<DeleteRequest> writeRequestList = ((DeleteOperation) obj).getDeleteRequests();
            return getFilter(writeRequestList);
        } else if (obj instanceof InsertOperation) {
            List<InsertRequest> writeRequestList = ((InsertOperation) obj).getInsertRequests();
            return getFilter(writeRequestList);
        } else if (obj instanceof UpdateOperation) {
            List<UpdateRequest> writeRequestList = ((UpdateOperation) obj).getUpdateRequests();
            return getFilter(writeRequestList);
        } else if (obj instanceof CreateCollectionOperation) {
            String filter = ((CreateCollectionOperation) obj).getCollectionName();
            return limitFilter(filter);
        } else if (obj instanceof CreateIndexesOperation) {
            List<String> filter = ((CreateIndexesOperation) obj).getIndexNames();
            return limitFilter(filter.toString());
        } else if (obj instanceof CreateViewOperation) {
            String filter = ((CreateViewOperation) obj).getViewName();
            return limitFilter(filter);
        } else if (obj instanceof FindAndDeleteOperation) {
            BsonDocument filter = ((FindAndDeleteOperation) obj).getFilter();
            return limitFilter(filter.toString());
        } else if (obj instanceof FindAndReplaceOperation) {
            BsonDocument filter = ((FindAndReplaceOperation) obj).getFilter();
            return limitFilter(filter.toString());
        } else if (obj instanceof FindAndUpdateOperation) {
            BsonDocument filter = ((FindAndUpdateOperation) obj).getFilter();
            return limitFilter(filter.toString());
        } else if (obj instanceof MapReduceToCollectionOperation) {
            BsonDocument filter = ((MapReduceToCollectionOperation) obj).getFilter();
            return limitFilter(filter.toString());
        } else if (obj instanceof MixedBulkWriteOperation) {
            List<? extends WriteRequest> writeRequestList = ((MixedBulkWriteOperation) obj).getWriteRequests();
            return getFilter(writeRequestList);
        } else {
            return MongoConstants.EMPTY;
        }
    }

    private static String getFilter(List<? extends WriteRequest> writeRequestList) {
        StringBuilder params = new StringBuilder();
        for (WriteRequest request : writeRequestList) {
            if (request instanceof InsertRequest) {
                params.append(((InsertRequest) request).getDocument().toString()).append(",");
            } else if (request instanceof DeleteRequest) {
                params.append(((DeleteRequest) request).getFilter()).append(",");
            } else if (request instanceof UpdateRequest) {
                params.append(((UpdateRequest) request).getFilter()).append(",");
            }
            final int filterLengthLimit = MongoPluginConfig.Plugin.MongoDB.FILTER_LENGTH_LIMIT;
            if (filterLengthLimit > 0 && params.length() > filterLengthLimit) {
                return params.substring(0, filterLengthLimit) + "...";
            }
        }
        return params.toString();
    }

    private static String limitFilter(String filter) {
        final StringBuilder params = new StringBuilder();
        final int filterLengthLimit = MongoPluginConfig.Plugin.MongoDB.FILTER_LENGTH_LIMIT;
        if (filterLengthLimit > 0 && filter.length() > filterLengthLimit) {
            return params.append(filter, 0, filterLengthLimit).append("...").toString();
        } else {
            return filter;
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apm-sniffer/apm-sdk-plugin/mongodb-4.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/mongodb/v4/support/MongoOperationHelper.java [70:139]:
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            return limitFilter(filter.toString());
        }  else if (obj instanceof ListCollectionsOperation) {
            BsonDocument filter = ((ListCollectionsOperation) obj).getFilter();
            return limitFilter(filter.toString());
        } else if (obj instanceof MapReduceWithInlineResultsOperation) {
            BsonDocument filter = ((MapReduceWithInlineResultsOperation) obj).getFilter();
            return limitFilter(filter.toString());
        } else if (obj instanceof DeleteOperation) {
            List<DeleteRequest> writeRequestList = ((DeleteOperation) obj).getDeleteRequests();
            return getFilter(writeRequestList);
        } else if (obj instanceof InsertOperation) {
            List<InsertRequest> writeRequestList = ((InsertOperation) obj).getInsertRequests();
            return getFilter(writeRequestList);
        } else if (obj instanceof UpdateOperation) {
            List<UpdateRequest> writeRequestList = ((UpdateOperation) obj).getUpdateRequests();
            return getFilter(writeRequestList);
        } else if (obj instanceof CreateCollectionOperation) {
            String filter = ((CreateCollectionOperation) obj).getCollectionName();
            return limitFilter(filter);
        } else if (obj instanceof CreateIndexesOperation) {
            List<String> filter = ((CreateIndexesOperation) obj).getIndexNames();
            return limitFilter(filter.toString());
        } else if (obj instanceof CreateViewOperation) {
            String filter = ((CreateViewOperation) obj).getViewName();
            return limitFilter(filter);
        } else if (obj instanceof FindAndDeleteOperation) {
            BsonDocument filter = ((FindAndDeleteOperation) obj).getFilter();
            return limitFilter(filter.toString());
        } else if (obj instanceof FindAndReplaceOperation) {
            BsonDocument filter = ((FindAndReplaceOperation) obj).getFilter();
            return limitFilter(filter.toString());
        } else if (obj instanceof FindAndUpdateOperation) {
            BsonDocument filter = ((FindAndUpdateOperation) obj).getFilter();
            return limitFilter(filter.toString());
        } else if (obj instanceof MapReduceToCollectionOperation) {
            BsonDocument filter = ((MapReduceToCollectionOperation) obj).getFilter();
            return limitFilter(filter.toString());
        } else if (obj instanceof MixedBulkWriteOperation) {
            List<? extends WriteRequest> writeRequestList = ((MixedBulkWriteOperation) obj).getWriteRequests();
            return getFilter(writeRequestList);
        } else {
            return MongoConstants.EMPTY;
        }
    }

    private static String getFilter(List<? extends WriteRequest> writeRequestList) {
        StringBuilder params = new StringBuilder();
        for (WriteRequest request : writeRequestList) {
            if (request instanceof InsertRequest) {
                params.append(((InsertRequest) request).getDocument().toString()).append(",");
            } else if (request instanceof DeleteRequest) {
                params.append(((DeleteRequest) request).getFilter()).append(",");
            } else if (request instanceof UpdateRequest) {
                params.append(((UpdateRequest) request).getFilter()).append(",");
            }
            final int filterLengthLimit = MongoPluginConfig.Plugin.MongoDB.FILTER_LENGTH_LIMIT;
            if (filterLengthLimit > 0 && params.length() > filterLengthLimit) {
                return params.substring(0, filterLengthLimit) + "...";
            }
        }
        return params.toString();
    }

    private static String limitFilter(String filter) {
        final StringBuilder params = new StringBuilder();
        final int filterLengthLimit = MongoPluginConfig.Plugin.MongoDB.FILTER_LENGTH_LIMIT;
        if (filterLengthLimit > 0 && filter.length() > filterLengthLimit) {
            return params.append(filter, 0, filterLengthLimit).append("...").toString();
        } else {
            return filter;
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