content: /*****************************************************************
   *   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
   *
   *    https://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.cayenne.exp.parser;
  
  import java.io.IOException;
  import java.util.List;
  
  import org.apache.cayenne.CayenneRuntimeException;
  import org.apache.cayenne.ObjectContext;
  import org.apache.cayenne.ObjectId;
  import org.apache.cayenne.Persistent;
  import org.apache.cayenne.exp.Expression;
  import org.apache.cayenne.exp.path.CayennePath;
  import org.apache.cayenne.map.Entity;
  import org.apache.cayenne.map.ObjAttribute;
  import org.apache.cayenne.map.ObjEntity;
  import org.apache.cayenne.reflect.PropertyUtils;
  import org.apache.cayenne.util.CayenneMapEntry;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class ASTObjPath extends ASTPath {
  
  	private static final long serialVersionUID = -3574281576491705706L;
  
  	private static final Logger LOGGER = LoggerFactory.getLogger(ASTObjPath.class);
  
  	public static final String OBJ_PREFIX = "obj:";
  
  	/**
  	 * Constructor used by expression parser. Do not invoke directly.
  	 */
  	ASTObjPath(int id) {
  		super(id);
  	}
  
  	public ASTObjPath() {
  		super(ExpressionParserTreeConstants.JJTOBJPATH);
  	}
  
  	public ASTObjPath(String value) {
  		super(ExpressionParserTreeConstants.JJTOBJPATH);
  		setPath(value);
  	}
  
  	public ASTObjPath(CayennePath path) {
  		super(ExpressionParserTreeConstants.JJTOBJPATH);
  		setPath(path);
  	}
  
  	@Override
  	protected Object evaluateNode(Object o) throws Exception {
  		return (o instanceof Persistent)
  				? ((Persistent) o).readNestedProperty(path)
  				: (o instanceof Entity)
  					? evaluateEntityNode((Entity<?,?,?>) o)
  					: PropertyUtils.getProperty(o, path);
  	}
  
  	/**
  	 * Creates a copy of this expression node, without copying children.
  	 */
  	@Override
  	public Expression shallowCopy() {
  		ASTObjPath copy = new ASTObjPath(id);
  		copy.path = path;
  		copy.setPathAliases(pathAliases);
  		return copy;
  	}
  
  	/**
  	 * @since 4.0
  	 */
  	@Override
  	public void appendAsEJBQL(List<Object> parameterAccumulator, Appendable out, String rootId) throws IOException {
  		out.append(rootId);
  		out.append('.');
  		out.append(path.value());
  	}
  
  	/**
  	 * @since 4.0
  	 */
  	@Override
  	public void appendAsString(Appendable out) throws IOException {
  		out.append(path.value());
  	}
  
  	@Override
  	public int getType() {
  		return Expression.OBJ_PATH;
  	}
  
  	void injectValue(Object source, Object value) {
  		if (getPath().length() == 1) {
  			try {
  				String firstSegment = getPath().first().value();
  				if (source instanceof Persistent) {
  					Persistent persistent = (Persistent) source;
  					persistent.writeProperty(firstSegment, dynamicCastValue(persistent, value));
  				} else {
  					PropertyUtils.setProperty(source, firstSegment, value);
  				}
  			} catch (CayenneRuntimeException ex) {
  				LOGGER.warn("Failed to inject value " + value + " on path " + getPath() + " to " + source, ex);
  			}
  		}
  	}
  
  	private Object dynamicCastValue(Persistent source, Object value) {
  		Class<?> javaClass = getDataTypeForObject(source);
  		if(javaClass == null) {
  			return value;
  		}
  
  		if(javaClass.isEnum()) {
  			@SuppressWarnings({"unchecked", "rawtypes"})
  			Enum enumValue = Enum.valueOf((Class<Enum>) javaClass, value.toString());
  			return enumValue;
  		}
  
  		return value;
  	}
  
  	private Class<?> getDataTypeForObject(Persistent source) {
  		ObjectContext context = source.getObjectContext();
  		ObjectId objectId = source.getObjectId();
  		if(context == null || objectId == null) {
  			return null;
  		}
  
  		ObjEntity entity = context.getEntityResolver().getObjEntity(objectId.getEntityName());
  		CayenneMapEntry entry = evaluateEntityNode(entity);
  		if(!(entry instanceof ObjAttribute)) {
  			return null;
  		}
  
  		return ((ObjAttribute) entry).getJavaClass();
  	}
  }
  