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/*******************************************************************************
* Copyright (c) 2005, 2015 BEA Systems, Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* tyeung@bea.com - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.apt.core.internal.declaration;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.eclipse.jdt.apt.core.internal.declaration.EclipseMirrorObject.MirrorKind;
import org.eclipse.jdt.apt.core.internal.env.BaseProcessorEnv;
import org.eclipse.jdt.apt.core.internal.util.Factory;
import org.eclipse.jdt.core.dom.IMethodBinding;
import org.eclipse.jdt.core.dom.ITypeBinding;
import org.eclipse.jdt.core.dom.SingleVariableDeclaration;
import org.eclipse.jdt.core.dom.Type;
import org.eclipse.jdt.core.dom.TypeParameter;
import com.sun.mirror.declaration.ParameterDeclaration;
import com.sun.mirror.declaration.TypeDeclaration;
import com.sun.mirror.declaration.TypeParameterDeclaration;
import com.sun.mirror.type.ReferenceType;
class ExecutableUtil {
/**
* @param executable must be a constructor, method or annotation element.
* @return the formal type parameters of the executable.
*/
static Collection<TypeParameterDeclaration> getFormalTypeParameters(
EclipseDeclarationImpl executable,
BaseProcessorEnv env)
{
// the dom ast does not provide type parameter list for annotation element
// that incorrectly includes them in the text
if(executable == null || executable.kind() == MirrorKind.ANNOTATION_ELEMENT)
return Collections.emptyList();
if( executable.kind() != MirrorKind.METHOD && executable.kind() != MirrorKind.CONSTRUCTOR)
throw new IllegalArgumentException("Executable is not a method " + //$NON-NLS-1$
executable.getClass().getName());
if( executable.isFromSource() ){
final org.eclipse.jdt.core.dom.MethodDeclaration methodAstNode =
(org.eclipse.jdt.core.dom.MethodDeclaration)executable.getAstNode();
// Synthetic methods will have no ast node
if (methodAstNode == null)
return Collections.emptyList();
final List<TypeParameter> typeParams = methodAstNode.typeParameters();
final List<TypeParameterDeclaration> result = new ArrayList<>();
for(TypeParameter typeParam : typeParams){
final ITypeBinding typeBinding = typeParam.resolveBinding();
if( typeBinding == null ){
throw new UnsupportedOperationException("cannot create a type parameter declaration without a binding"); //$NON-NLS-1$
}
else{
final TypeParameterDeclaration typeParamDecl =
(TypeParameterDeclaration)Factory.createDeclaration(typeBinding, env);
if( typeParamDecl != null )
result.add(typeParamDecl);
}
}
return result;
}
else{ // binary
if( !executable.isBindingBased() )
throw new IllegalStateException("binary executable without binding."); //$NON-NLS-1$
final IMethodBinding methodBinding = ((ExecutableDeclarationImpl)executable).getDeclarationBinding();
final ITypeBinding[] typeParams = methodBinding.getTypeParameters();
if( typeParams == null || typeParams.length == 0 )
return Collections.emptyList();
final List<TypeParameterDeclaration> result = new ArrayList<>();
for( ITypeBinding typeVar : typeParams ){
final TypeParameterDeclaration typeParamDecl =
(TypeParameterDeclaration)Factory.createDeclaration(typeVar, env);
if( typeParamDecl != null )
result.add(typeParamDecl);
}
return result;
}
}
/**
* @param executable must be a constructor, method or annotation element.
* @return the list formal parameters of the executable.
*/
static Collection<ParameterDeclaration> getParameters(
final EclipseDeclarationImpl executable,
final BaseProcessorEnv env)
{
// the dom ast does not provide parameter list for annotation element
// that incorrectly includes them in the text
if(executable == null || executable.kind() == MirrorKind.ANNOTATION_ELEMENT)
return Collections.emptyList();
if( executable.kind() != MirrorKind.METHOD && executable.kind() != MirrorKind.CONSTRUCTOR)
throw new IllegalArgumentException("Executable is not a method " + //$NON-NLS-1$
executable.getClass().getName());
if( executable.isFromSource() ){
// We always need to look into the ast to make sure the complete list of
// parameters are returned since parameters with unresolved type will not
// show up in the method binding
final org.eclipse.jdt.core.dom.MethodDeclaration methodAstNode =
(org.eclipse.jdt.core.dom.MethodDeclaration)executable.getAstNode();
// Synthetic methods will have no ast node
if (methodAstNode == null)
return Collections.emptyList();
final List<SingleVariableDeclaration> params = methodAstNode.parameters();
if( params == null || params.size() == 0 )
return Collections.emptyList();
final List<ParameterDeclaration> result = new ArrayList<>(params.size());
for( int i=0, size=params.size(); i<size; i++ ){
final SingleVariableDeclaration varDecl = params.get(i);
final ParameterDeclaration param =
Factory.createParameterDeclaration(varDecl, executable.getResource(), env);
result.add(param);
}
return result;
}
else{
if( !executable.isBindingBased() )
throw new IllegalStateException("binary executable without binding."); //$NON-NLS-1$
// it is binary, since we don't support the class file format, will rely on the
// binding and hope that it's complete.
final ExecutableDeclarationImpl impl = (ExecutableDeclarationImpl)executable;
final IMethodBinding methodBinding = impl.getDeclarationBinding();
final ITypeBinding[] paramTypes = methodBinding.getParameterTypes();
if( paramTypes == null || paramTypes.length == 0 )
return Collections.emptyList();
final List<ParameterDeclaration> result = new ArrayList<>(paramTypes.length);
for( int i=0; i<paramTypes.length; i++ ){
final ITypeBinding type = paramTypes[i];
final ParameterDeclaration param = Factory.createParameterDeclaration(impl, i, type, env);
result.add(param);
}
return result;
}
}
/**
* @param executable must be a constructor, method or annotation element.
* @return the list thrown types of the executable.
*/
static Collection<ReferenceType> getThrownTypes(
final EclipseDeclarationImpl executable,
final BaseProcessorEnv env)
{
if(executable == null || executable.kind() == MirrorKind.ANNOTATION_ELEMENT)
return Collections.emptyList();
if( executable.kind() != MirrorKind.METHOD && executable.kind() != MirrorKind.CONSTRUCTOR)
throw new IllegalArgumentException("Executable is not a method " + //$NON-NLS-1$
executable.getClass().getName());
if( executable.isFromSource()){
// We always need to look into the ast to make sure the complete list of
// parameters are returned since parameters with unresolved type will not
// show up in the method binding
final org.eclipse.jdt.core.dom.MethodDeclaration methodAstNode =
(org.eclipse.jdt.core.dom.MethodDeclaration)executable.getAstNode();
// If this method is synthetic, there will be no AST node
if (methodAstNode == null)
return Collections.emptyList();
final List<Type> exceptions = methodAstNode.thrownExceptionTypes();
if(exceptions == null || exceptions.size() == 0 )
return Collections.emptyList();
final List<ReferenceType> results = new ArrayList<>(4);
for(Type exception : exceptions ){
final ITypeBinding eType = exception.resolveBinding();
final ReferenceType refType;
if( eType == null || eType.isRecovered() )
refType = Factory.createErrorClassType(exception.toString());
else
refType = Factory.createReferenceType(eType, env);
results.add(refType);
}
return results;
}
else{
if( !executable.isBindingBased() )
throw new IllegalStateException("binary executable without binding."); //$NON-NLS-1$
final ExecutableDeclarationImpl impl = (ExecutableDeclarationImpl)executable;
final IMethodBinding methodBinding = impl.getDeclarationBinding();
final ITypeBinding[] exceptions = methodBinding.getExceptionTypes();
final List<ReferenceType> results = new ArrayList<>(4);
for( ITypeBinding exception : exceptions ){
final TypeDeclaration mirrorDecl = Factory.createReferenceType(exception, env);
if( mirrorDecl != null)
results.add((ReferenceType)mirrorDecl);
}
return results;
}
}
}
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