org.eclipse.jdt.core.dom.UnionType Java Examples

/**
 * Returns the topmost ancestor of <code>node</code> that is a {@link Type} (but not a {@link UnionType}).
 * <p>
 * <b>Note:</b> The returned node often resolves to a different binding than the given <code>node</code>!
 * 
 * @param node the starting node, can be <code>null</code>
 * @return the topmost type or <code>null</code> if the node is not a descendant of a type node
 * @see #getNormalizedNode(ASTNode)
 */
public static Type getTopMostType(ASTNode node) {
	ASTNode result= null;
	while (node instanceof Type && !(node instanceof UnionType)
			|| node instanceof Name
			|| node instanceof Annotation || node instanceof MemberValuePair
			|| node instanceof Expression) { // Expression could maybe be reduced to expression node types that can appear in an annotation
		result= node;
		node= node.getParent();
	}
	
	if (result instanceof Type)
		return (Type) result;
	
	return null;
}
 

private static void removeException(ASTRewrite rewrite, UnionType unionType, Type exception) {
	ListRewrite listRewrite = rewrite.getListRewrite(unionType, UnionType.TYPES_PROPERTY);
	List<Type> types = unionType.types();
	for (Iterator<Type> iterator = types.iterator(); iterator.hasNext();) {
		Type type = iterator.next();
		if (type.equals(exception)) {
			listRewrite.remove(type, null);
		}
	}
}
 

private void handleCatchArguments(List<CatchClause> catchClauses) {
	for (Iterator<CatchClause> iter = catchClauses.iterator(); iter.hasNext();) {
		Type type = iter.next().getException().getType();
		if (type instanceof UnionType) {
			List<Type> types = ((UnionType) type).types();
			for (Iterator<Type> iterator = types.iterator(); iterator.hasNext();) {
				removeCaughtExceptions(iterator.next().resolveBinding());
			}
		} else {
			removeCaughtExceptions(type.resolveBinding());
		}
	}
}
 

/**
 * @param type
 * @return
 */
protected String getNameOfType(final Type type) {
	 String nameOfType = "";
	if (type != null) {
		if (type.isPrimitiveType()) {
			nameOfType = type.toString();
		} else if (type.isParameterizedType()) {
			nameOfType = getParametrizedType((ParameterizedType) type);
		} else if (type.isArrayType()) {
			final ArrayType array = (ArrayType) type;
			nameOfType = getNameOfType(array.getElementType()) /*+ "[]"*/;
		} else if (type.isUnionType()) {
               // TODO: this is used for exceptions till now
               // So we will just capture the first type that we encounter
			final UnionType uType = (UnionType) type;
			final StringBuilder sb = new StringBuilder();
			for (final Object unionedType : uType.types()) {
				sb.append(getNameOfType((Type) unionedType));
                   break;
			}

			nameOfType = sb.toString();
		} else if (type.isWildcardType()) {
			final WildcardType wType = (WildcardType) type;
			nameOfType = (wType.isUpperBound() ? "? extends " : "? super ")
					+ getNameOfType(wType.getBound());
		} else {
			nameOfType = getFullyQualifiedNameFor(type.toString());
		}
	}
	return nameOfType;
}
 

/**
 * @param type
 * @return
 */
protected String getNameOfType(final Type type) {
	final String nameOfType;
	if (type.isPrimitiveType()) {
		nameOfType = type.toString();
	} else if (type.isParameterizedType()) {
		nameOfType = getParametrizedType((ParameterizedType) type);
	} else if (type.isArrayType()) {
		final ArrayType array = (ArrayType) type;
		nameOfType = getNameOfType(array.getElementType()) + "[]";
	} else if (type.isUnionType()) {
		final UnionType uType = (UnionType) type;
		final StringBuffer sb = new StringBuffer();
		for (final Object unionedType : uType.types()) {
			sb.append(getNameOfType(((Type) unionedType)));
			sb.append(" | ");
		}
		sb.delete(sb.length() - 3, sb.length());
		nameOfType = sb.toString();
	} else if (type.isWildcardType()) {
		final WildcardType wType = (WildcardType) type;
		if (wType.getBound() == null)
			return "?";
		nameOfType = (wType.isUpperBound() ? "? extends " : "? super ") + getNameOfType(wType.getBound());
	} else {
		nameOfType = getFullyQualifiedNameFor(type.toString());
	}
	return nameOfType;
}
 

private void handleCatchArguments(List<CatchClause> catchClauses) {
	for (Iterator<CatchClause> iter= catchClauses.iterator(); iter.hasNext(); ) {
		Type type= iter.next().getException().getType();
		if (type instanceof UnionType) {
			List<Type> types= ((UnionType) type).types();
			for (Iterator<Type> iterator= types.iterator(); iterator.hasNext();) {
				removeCaughtExceptions(iterator.next().resolveBinding());
			}
		} else {
			removeCaughtExceptions(type.resolveBinding());
		}
	}
}
 

@Override
public boolean visit(TryStatement node) {
	int currentSize= fCaughtExceptions.size();
	List<CatchClause> catchClauses= node.catchClauses();
	for (Iterator<CatchClause> iter= catchClauses.iterator(); iter.hasNext();) {
		Type type= iter.next().getException().getType();
		if (type instanceof UnionType) {
			List<Type> types= ((UnionType) type).types();
			for (Iterator<Type> iterator= types.iterator(); iterator.hasNext();) {
				addCaughtException(iterator.next());
			}
		} else {
			addCaughtException(type);
		}
	}

	node.getBody().accept(this);

	handleResourceDeclarations(node);

	int toRemove= fCaughtExceptions.size() - currentSize;
	for (int i= toRemove; i > 0; i--) {
		fCaughtExceptions.remove(currentSize);
	}

	// visit catch and finally
	for (Iterator<CatchClause> iter= catchClauses.iterator(); iter.hasNext();) {
		iter.next().accept(this);
	}
	if (node.getFinally() != null)
		node.getFinally().accept(this);

	// return false. We have visited the body by ourselves.
	return false;
}
 

private static void removeException(ASTRewrite rewrite, UnionType unionType, Type exception) {
	ListRewrite listRewrite= rewrite.getListRewrite(unionType, UnionType.TYPES_PROPERTY);
	List<Type> types= unionType.types();
	for (Iterator<Type> iterator= types.iterator(); iterator.hasNext();) {
		Type type= iterator.next();
		if (type.equals(exception)) {
			listRewrite.remove(type, null);
		}
	}
}
 

public boolean visit(UnionType type) {
	List types = type.types();
	for (int i = 0; i < types.size(); i++){
		handleType((Type) types.get(i));
	}
	return false;
}
 

public boolean visit(UnionType type){
	/*
	 *  Type | Type { | Type }
	 */
	activateDiffStyle(type);
	for (int i = 0; i < type.types().size(); i++){
		handleType((Type) type.types().get(i));
		if (i < type.types().size() - 1){
			appendPipe();
		}
	}
	deactivateDiffStyle(type);
	return false;
}
 

@Override
public boolean visit(UnionType node) {
	addTypeBinding(node);
	return true;
}
 

@Override
public void endVisit(UnionType node) {
	endVisitNode(node);
}
 

@Override
public boolean visit(UnionType node) {
	return visitNode(node);
}