| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.drill.common; |
| |
| import java.io.IOException; |
| import java.lang.reflect.ParameterizedType; |
| import java.lang.reflect.Type; |
| |
| import org.apache.drill.common.JSONOptions.De; |
| import org.apache.drill.common.JSONOptions.Se; |
| import org.apache.drill.common.config.DrillConfig; |
| import org.apache.drill.common.config.LogicalPlanPersistence; |
| import org.apache.drill.common.exceptions.LogicalPlanParsingException; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.fasterxml.jackson.core.JsonGenerationException; |
| import com.fasterxml.jackson.core.JsonGenerator; |
| import com.fasterxml.jackson.core.JsonLocation; |
| import com.fasterxml.jackson.core.JsonParser; |
| import com.fasterxml.jackson.core.JsonProcessingException; |
| import com.fasterxml.jackson.core.TreeNode; |
| import com.fasterxml.jackson.core.type.TypeReference; |
| import com.fasterxml.jackson.databind.DeserializationContext; |
| import com.fasterxml.jackson.databind.JsonNode; |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.fasterxml.jackson.databind.SerializerProvider; |
| import com.fasterxml.jackson.databind.annotation.JsonDeserialize; |
| import com.fasterxml.jackson.databind.annotation.JsonSerialize; |
| import com.fasterxml.jackson.databind.deser.std.StdDeserializer; |
| import com.fasterxml.jackson.databind.node.TreeTraversingParser; |
| import com.fasterxml.jackson.databind.ser.std.StdSerializer; |
| import com.google.common.base.Preconditions; |
| |
| @JsonSerialize(using = Se.class) |
| @JsonDeserialize(using = De.class) |
| public class JSONOptions { |
| |
| private final static Logger logger = LoggerFactory.getLogger(JSONOptions.class); |
| |
| private JsonNode root; |
| private JsonLocation location; |
| private Object opaque; |
| |
| public JSONOptions(Object opaque) { |
| this.opaque = opaque; |
| } |
| |
| public JSONOptions(JsonNode n, JsonLocation location) { |
| this.root = n; |
| this.location = location; |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T getWith(LogicalPlanPersistence lpPersistance, Class<T> c) { |
| try { |
| if (opaque != null) { |
| final Class<?> opaqueClass = opaque.getClass(); |
| if (opaqueClass.equals(c)) { |
| return (T) opaque; |
| } else { |
| // Enum values that override methods are given $1, $2 ... extensions. Ignore the extension. |
| // e.g. SystemTable$1 for SystemTable.OPTION |
| if (c.isEnum()) { |
| final String opaqueName = opaqueClass.getName().replaceAll("\\$\\d+$", ""); |
| final String cName = c.getName(); |
| if(opaqueName.equals(cName)) { |
| return (T) opaque; |
| } |
| } |
| throw new IllegalArgumentException(String.format("Attempted to retrieve a option with type of %s. " + |
| "However, the JSON options carried an opaque value of type %s.", c.getName(), opaqueClass.getName())); |
| } |
| } |
| |
| //logger.debug("Read tree {}", root); |
| return lpPersistance.getMapper().treeToValue(root, c); |
| } catch (JsonProcessingException e) { |
| throw new LogicalPlanParsingException(String.format("Failure while trying to convert late bound " + |
| "json options to type of %s. Reference was originally located at line %d, column %d.", |
| c.getCanonicalName(), location.getLineNr(), location.getColumnNr()), e); |
| } |
| } |
| |
| public <T> T getListWith(LogicalPlanPersistence config, TypeReference<T> t) throws IOException { |
| return getListWith(config.getMapper(), t); |
| } |
| |
| public JsonNode asNode(){ |
| Preconditions.checkArgument(this.root != null, "Attempted to grab JSONOptions as JsonNode when no root node was stored. You can only convert non-opaque JSONOptions values to JsonNodes."); |
| return root; |
| } |
| |
| public JsonParser asParser(){ |
| Preconditions.checkArgument(this.root != null, "Attempted to grab JSONOptions as Parser when no root node was stored. You can only convert non-opaque JSONOptions values to parsers."); |
| return new TreeTraversingParser(root); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T getListWith(ObjectMapper mapper, TypeReference<T> t) throws IOException { |
| if (opaque != null) { |
| Type c = t.getType(); |
| if (c instanceof ParameterizedType) { |
| c = ((ParameterizedType)c).getRawType(); |
| } |
| if ( c.equals(opaque.getClass())) { |
| return (T) opaque; |
| } else { |
| throw new IOException(String.format("Attempted to retrieve a list with type of %s. However, the JSON " + |
| "options carried an opaque value of type %s.", t.getType(), opaque.getClass().getName())); |
| } |
| } |
| if (root == null) { |
| return null; |
| } |
| return mapper.treeAsTokens(root).readValueAs(t); |
| } |
| |
| public JsonNode path(String name) { |
| return root.path(name); |
| } |
| |
| public JsonNode getRoot() { |
| return root; |
| } |
| |
| public static class De extends StdDeserializer<JSONOptions> { |
| |
| public De() { |
| super(JSONOptions.class); |
| logger.debug("Creating Deserializer."); |
| } |
| |
| @Override |
| public JSONOptions deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, |
| JsonProcessingException { |
| JsonLocation l = jp.getTokenLocation(); |
| // logger.debug("Reading tree."); |
| TreeNode n = jp.readValueAsTree(); |
| // logger.debug("Tree {}", n); |
| if (n instanceof JsonNode) { |
| return new JSONOptions( (JsonNode) n, l); |
| } else { |
| throw new IllegalArgumentException(String.format("Received something other than a JsonNode %s", n)); |
| } |
| } |
| |
| } |
| |
| public static class Se extends StdSerializer<JSONOptions> { |
| |
| public Se() { |
| super(JSONOptions.class); |
| } |
| |
| @Override |
| public void serialize(JSONOptions value, JsonGenerator jgen, SerializerProvider provider) throws IOException, |
| JsonGenerationException { |
| if (value.opaque != null) { |
| jgen.writeObject(value.opaque); |
| } else { |
| jgen.writeTree(value.root); |
| } |
| |
| } |
| |
| } |
| |
| } |