package ca.uhn.fhir.context;
   
   /*
    * #%L
    * HAPI FHIR - Core Library
    * %%
    * Copyright (C) 2014 - 2018 University Health Network
    * %%
    * Licensed 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.
   * #L%
   */
  import static org.apache.commons.lang3.StringUtils.isNotBlank;
  
  import java.lang.reflect.Field;
  import java.lang.reflect.Modifier;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.hl7.fhir.instance.model.api.IBase;
  
  import ca.uhn.fhir.model.api.IElement;
  import ca.uhn.fhir.model.api.annotation.Child;
  import ca.uhn.fhir.model.api.annotation.Description;
  import ca.uhn.fhir.model.api.annotation.Extension;
  import ca.uhn.fhir.util.ReflectionUtil;
  
  public class RuntimeChildDeclaredExtensionDefinition extends RuntimeChildChoiceDefinition {
  
  	private boolean myDefinedLocally;
  	private String myExtensionUrl;
  	private boolean myModifier;
  	private Map<String, RuntimeChildDeclaredExtensionDefinition> myUrlToChildExtension;
  	private volatile Object myInstanceConstructorArguments;
  	private Class<?> myEnumerationType;
  	private Class<? extends IBase> myChildType;
  	private RuntimeResourceBlockDefinition myChildResourceBlock;
  	private BaseRuntimeElementDefinition<?> myChildDef;
  
  	/**
  	 * @param theBoundTypeBinder
  	 *           If the child is of a type that requires a constructor argument to instantiate, this is the argument to
  	 *           use
  	 * @param theDefinedLocally
  	 *           See {@link Extension#definedLocally()}
  	 */
  	RuntimeChildDeclaredExtensionDefinition(Field theField, Child theChild, Description theDescriptionAnnotation, Extension theExtension, String theElementName, String theExtensionUrl,
  			Class<? extends IBase> theChildType, Object theBoundTypeBinder)
  			throws ConfigurationException {
  		super(theField, theElementName, theChild, theDescriptionAnnotation);
  		assert isNotBlank(theExtensionUrl);
  		myExtensionUrl = theExtensionUrl;
  		myChildType = theChildType;
  		myDefinedLocally = theExtension.definedLocally();
  		myModifier = theExtension.isModifier();
  		myInstanceConstructorArguments = theBoundTypeBinder;
  
  		List<Class<? extends IBase>> choiceTypes = new ArrayList<Class<? extends IBase>>();
  		for (Class<? extends IElement> next : theChild.type()) {
  			choiceTypes.add(next);
  		}
  
  		if (Modifier.isAbstract(theChildType.getModifiers()) == false) {
  			choiceTypes.add(theChildType);
  		}
  
  		setChoiceTypes(choiceTypes);
  	}
  
  	@Override
  	public String getElementName() {
  		return "value";
  	}
  
  	@Override
  	public Object getInstanceConstructorArguments() {
  		Object retVal = myInstanceConstructorArguments;
  		if (retVal == null && myEnumerationType != null) {
  			retVal = RuntimeChildPrimitiveEnumerationDatatypeDefinition.toEnumFactory(myEnumerationType);
  			myInstanceConstructorArguments = retVal;
  		}
  		return retVal;
  	}
  
  	public void setEnumerationType(Class<?> theEnumerationType) {
  		myEnumerationType = theEnumerationType;
  	}
 
 	@Override
 	public String getChildNameByDatatype(Class<? extends IBase> theDatatype) {
 
 		String retVal = super.getChildNameByDatatype(theDatatype);
 
 		if (retVal != null) {
 			BaseRuntimeElementDefinition<?> childDef = super.getChildElementDefinitionByDatatype(theDatatype);
 			if (childDef instanceof RuntimeResourceBlockDefinition) {
 				// Child is a newted extension
 				retVal = null;
 			}
 		}
 
 		if (retVal == null) {
 			if (myModifier) {
 				return "modifierExtension";
 			}
 			return "extension";
 
 		}
 		return retVal;
 	}
 
 	@Override
 	public BaseRuntimeElementDefinition<?> getChildByName(String theName) {
 		String name = theName;
 		if ("extension".equals(name)||"modifierExtension".equals(name)) {
 			if (myChildResourceBlock != null) {
 				return myChildResourceBlock;
 			}
 			if (myChildDef != null) {
 				return myChildDef;
 			}
 		}
 
 		if (getValidChildNames().contains(name) == false) {
 			return null;
 		}
 		
 		return super.getChildByName(name);
 	}
 
 	@Override
 	public BaseRuntimeElementDefinition<?> getChildElementDefinitionByDatatype(Class<? extends IBase> theDatatype) {
 		if (myChildResourceBlock != null) {
 			if (myChildResourceBlock.getImplementingClass().equals(theDatatype)) {
 				return myChildResourceBlock;
 			}
 		}
 		return super.getChildElementDefinitionByDatatype(theDatatype);
 	}
 
 	public RuntimeChildDeclaredExtensionDefinition getChildExtensionForUrl(String theUrl) {
 		return myUrlToChildExtension.get(theUrl);
 	}
 
 	@Override
 	public String getExtensionUrl() {
 		return myExtensionUrl;
 	}
 
 	public boolean isDefinedLocally() {
 		return myDefinedLocally;
 	}
 
 	@Override
 	public boolean isModifier() {
 		return myModifier;
 	}
 
 	@Override
 	void sealAndInitialize(FhirContext theContext, Map<Class<? extends IBase>, BaseRuntimeElementDefinition<?>> theClassToElementDefinitions) {
 		myUrlToChildExtension = new HashMap<String, RuntimeChildDeclaredExtensionDefinition>();
 
 		BaseRuntimeElementDefinition<?> elementDef = theClassToElementDefinitions.get(myChildType);
 
 		/*
 		 * This will happen for any type that isn't defined in the base set of
 		 * built-in types, e.g. custom structures or custom extensions
 		 */
 		if (elementDef == null) {
 			if (Modifier.isAbstract(myChildType.getModifiers()) == false) {
 				elementDef = theContext.getElementDefinition(myChildType);
 			}
 		}
 
 		if (elementDef instanceof RuntimePrimitiveDatatypeDefinition || elementDef instanceof RuntimeCompositeDatatypeDefinition) {
 //			myDatatypeChildName = "value" + elementDef.getName().substring(0, 1).toUpperCase() + elementDef.getName().substring(1);
 //			if ("valueResourceReference".equals(myDatatypeChildName)) {
 				// Per one of the examples here: http://hl7.org/implement/standards/fhir/extensibility.html#extension
 //				myDatatypeChildName = "valueResource";
 //				List<Class<? extends IBaseResource>> types = new ArrayList<Class<? extends IBaseResource>>();
 //				types.add(IBaseResource.class);
 //				myChildDef = findResourceReferenceDefinition(theClassToElementDefinitions);
 //			} else {
 				myChildDef = elementDef;
 //			}
 		} else if (elementDef instanceof RuntimeResourceBlockDefinition) {
 			RuntimeResourceBlockDefinition extDef = ((RuntimeResourceBlockDefinition) elementDef);
 			for (RuntimeChildDeclaredExtensionDefinition next : extDef.getExtensions()) {
 				myUrlToChildExtension.put(next.getExtensionUrl(), next);
 			}
 			myChildResourceBlock = (RuntimeResourceBlockDefinition) elementDef;
 		}
 
 		myUrlToChildExtension = Collections.unmodifiableMap(myUrlToChildExtension);
 
 		super.sealAndInitialize(theContext, theClassToElementDefinitions);
 	}
 
 	public IBase newInstance() {
 		return ReflectionUtil.newInstance(myChildType);
 	}
 
 	public Class<? extends IBase> getChildType() {
 		return myChildType;
 	}
 
 }