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/*******************************************************************************
* Copyright (c) 2011 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation
*
******************************************************************************/
package org.eclipse.jpt.jpa.core.internal.jpql;
import org.eclipse.jdt.core.BindingKey;
import org.eclipse.jdt.core.IMethod;
import org.eclipse.jdt.core.Signature;
import org.eclipse.persistence.jpa.jpql.spi.IConstructor;
import org.eclipse.persistence.jpa.jpql.spi.IType;
import org.eclipse.persistence.jpa.jpql.spi.ITypeDeclaration;
import org.eclipse.persistence.jpa.jpql.spi.ITypeRepository;
/**
* The concrete implementation of {@link IConstructor} that is wrapping the {@link IMethod}
* representation of a Java constructor (either coming from a Java compiled file or a Java source
* file).
*
* @version 3.0
* @since 3.0
* @author Pascal Filion
*/
final class ClassConstructor implements IConstructor {
/**
* The information of the constructor.
*/
private IMethod method;
/**
* The declaring type of this constructor.
*/
private JpaType type;
/**
* The cached {@link ITypeDeclaration ITypeDeclarations} representing each of the constructor's
* parameter types.
*/
private ITypeDeclaration[] typeDeclarations;
/**
* Creates a new <code>ClassConstructor</code>.
*
* @param type The declaring type of this constructor
* @param methodInfo The information of the constructor
*/
ClassConstructor(JpaType type, IMethod method) {
super();
this.type = type;
this.method = method;
}
private ITypeDeclaration[] buildParameterTypes() {
BindingKey bindingKey = new BindingKey(method.getKey());
String signature = bindingKey.toSignature();
int count = Signature.getParameterCount(signature);
ITypeDeclaration[] typeDeclarations = new ITypeDeclaration[count];
int index = 0;
for (String parameterType : Signature.getParameterTypes(signature)) {
// 1. Retrieve the parameter type (without the type parameters)
String parameterTypeName = Signature.getTypeErasure(parameterType);
// 3. Convert the type signature to a dot-based name
parameterTypeName = Signature.toString(parameterTypeName);
// 4. Create the ITypeDeclaration
typeDeclarations[index++] = new JpaTypeDeclaration(
getTypeRepository().getType(parameterTypeName),
buildTypeParameters(parameterType),
Signature.getArrayCount(parameterType)
);
}
return typeDeclarations;
}
private ITypeDeclaration[] buildTypeParameters(String signature) {
String[] typeParameters = Signature.getTypeArguments(signature);
ITypeDeclaration[] generics = new ITypeDeclaration[typeParameters.length];
for (int index = 0; index < typeParameters.length; index++) {
String typeParameter = typeParameters[index];
// 1. Retrieve the parameter type (without the wild cards)
switch (Signature.getTypeSignatureKind(typeParameter)) {
case Signature.WILDCARD_TYPE_SIGNATURE: {
typeParameter = typeParameter.substring(1);
}
}
if (typeParameter.length() == 0) {
generics[index] = getTypeRepository().getTypeHelper().objectTypeDeclaration();
}
else {
String typeParameterName = Signature.getTypeErasure(typeParameter);
// 3. Convert the type signature to a dot-based name
typeParameterName = Signature.toString(typeParameterName);
// 3. Retrieve the IType for the type parameter
IType genericType = getTypeRepository().getType(typeParameterName);
if (genericType.isResolvable()) {
generics[index] = genericType.getTypeDeclaration();
}
else {
generics[index] = getTypeRepository().getTypeHelper().objectTypeDeclaration();
}
}
}
return generics;
}
/**
* {@inheritDoc}
*/
public ITypeDeclaration[] getParameterTypes() {
if (typeDeclarations == null) {
typeDeclarations = buildParameterTypes();
}
return typeDeclarations;
}
private ITypeRepository getTypeRepository() {
return type.getTypeRepository();
}
}
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