| /******************************************************************************* |
| * Copyright (c) 2013, 2019 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.jdt.core.dom; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Type node for an intersection type in a cast expression (added in JLS8 API). |
| * <pre> |
| * IntersectionType: |
| * Type <b>&</b> Type { <b>&</b> Type } |
| * </pre> |
| * <p> |
| * This kind of node is used only inside a cast expression. |
| * </p> |
| * |
| * @since 3.10 |
| * @noinstantiate This class is not intended to be instantiated by clients. |
| */ |
| public class IntersectionType extends Type { |
| |
| /** |
| * The "types" structural property of this node type (element type: {@link Type}). |
| */ |
| public static final ChildListPropertyDescriptor TYPES_PROPERTY = |
| new ChildListPropertyDescriptor(IntersectionType.class, "types", Type.class, CYCLE_RISK); //$NON-NLS-1$ |
| |
| /** |
| * A list of property descriptors (element type: |
| * {@link StructuralPropertyDescriptor}), |
| * or null if uninitialized. |
| */ |
| private static final List PROPERTY_DESCRIPTORS_8_0; |
| |
| static { |
| List propertyList = new ArrayList(2); |
| createPropertyList(IntersectionType.class, propertyList); |
| addProperty(TYPES_PROPERTY, propertyList); |
| PROPERTY_DESCRIPTORS_8_0 = reapPropertyList(propertyList); |
| } |
| |
| /** |
| * Returns a list of structural property descriptors for this node type. |
| * Clients must not modify the result. |
| * |
| * @param apiLevel the API level; one of the |
| * <code>AST.JLS*</code> constants |
| * @return a list of property descriptors (element type: |
| * {@link StructuralPropertyDescriptor}) |
| */ |
| public static List propertyDescriptors(int apiLevel) { |
| return PROPERTY_DESCRIPTORS_8_0; |
| } |
| |
| /** |
| * The list of types (element type: {@link Type}). Defaults to an empty list. |
| */ |
| private ASTNode.NodeList types = new ASTNode.NodeList(TYPES_PROPERTY); |
| |
| /** |
| * Creates a new unparented node for an intersection type owned by the given AST. |
| * By default, it has no types.<p> |
| * |
| * N.B. This constructor is package-private. |
| * </p> |
| * |
| * @param ast the AST that is to own this node |
| */ |
| IntersectionType(AST ast) { |
| super(ast); |
| unsupportedIn2_3_4(); |
| } |
| |
| @Override |
| final List internalStructuralPropertiesForType(int apiLevel) { |
| return propertyDescriptors(apiLevel); |
| } |
| |
| @Override |
| final List internalGetChildListProperty(ChildListPropertyDescriptor property) { |
| if (property == TYPES_PROPERTY) { |
| return types(); |
| } |
| // allow default implementation to flag the error |
| return super.internalGetChildListProperty(property); |
| } |
| |
| @Override |
| final int getNodeType0() { |
| return INTERSECTION_TYPE; |
| } |
| |
| @Override |
| ASTNode clone0(AST target) { |
| IntersectionType result = new IntersectionType(target); |
| result.setSourceRange(getStartPosition(), getLength()); |
| result.types().addAll( |
| ASTNode.copySubtrees(target, types())); |
| return result; |
| } |
| |
| @Override |
| final boolean subtreeMatch0(ASTMatcher matcher, Object other) { |
| // dispatch to correct overloaded match method |
| return matcher.match(this, other); |
| } |
| |
| @Override |
| void accept0(ASTVisitor visitor) { |
| boolean visitChildren = visitor.visit(this); |
| if (visitChildren) { |
| // visit children in normal left to right reading order |
| acceptChildren(visitor, this.types); |
| } |
| visitor.endVisit(this); |
| } |
| |
| /** |
| * Returns the live ordered list of types in this intersection type. |
| * Adding and removing nodes from this list affects this node |
| * dynamically. All nodes in this list must be |
| * <code>Type</code>s; attempts to add any other |
| * type of node will trigger an exception. |
| * |
| * @return the live list of types in this intersection type (element type: {@link Type}) |
| */ |
| public List types() { |
| return this.types; |
| } |
| |
| @Override |
| int memSize() { |
| return BASE_NODE_SIZE + 1 * 4; |
| } |
| |
| @Override |
| int treeSize() { |
| return |
| memSize() |
| + this.types.listSize(); |
| } |
| } |
| |