/*******************************************************************************
* Copyright (c) 2011 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.che.ide.ext.java.jdt.core.dom;
import java.util.ArrayList;
import java.util.List;
/**
* Type node for an union type (added in JLS4 API).
* <p/>
* <pre>
* UnionType:
* Type <b>|</b> Type { <b>|</b> Type }
* </pre>
* <p>
* This kind of node is used inside a catch clause's formal parameter type.
* </p>
*
* @noinstantiate This class is not intended to be instantiated by clients.
* @since 3.7.1
*/
public class UnionType extends Type {
/** The "types" structural property of this node type (element type: {@link Type}). */
public static final ChildListPropertyDescriptor TYPES_PROPERTY = new ChildListPropertyDescriptor(UnionType.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;
static {
List propertyList = new ArrayList(2);
createPropertyList(UnionType.class, propertyList);
addProperty(TYPES_PROPERTY, propertyList);
PROPERTY_DESCRIPTORS = 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;
}
/** 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 union type owned by the given AST. By default, it has no types.
* <p>
* <p/>
* N.B. This constructor is package-private.
* </p>
*
* @param ast
* the AST that is to own this node
*/
UnionType(AST ast) {
super(ast);
unsupportedIn2_3();
}
/* (omit javadoc for this method) Method declared on ASTNode. */
final List internalStructuralPropertiesForType(int apiLevel) {
return propertyDescriptors(apiLevel);
}
/* (omit javadoc for this method) Method declared on ASTNode. */
final List internalGetChildListProperty(ChildListPropertyDescriptor property) {
if (property == TYPES_PROPERTY) {
return types();
}
// allow default implementation to flag the error
return super.internalGetChildListProperty(property);
}
/* (omit javadoc for this method) Method declared on ASTNode. */
final int getNodeType0() {
return UNION_TYPE;
}
/* (omit javadoc for this method) Method declared on ASTNode. */
ASTNode clone0(AST target) {
UnionType result = new UnionType(target);
result.setSourceRange(getStartPosition(), getLength());
result.types().addAll(ASTNode.copySubtrees(target, types()));
return result;
}
/* (omit javadoc for this method) Method declared on ASTNode. */
final boolean subtreeMatch0(ASTMatcher matcher, Object other) {
// dispatch to correct overloaded match method
return matcher.match(this, other);
}
/* (omit javadoc for this method) Method declared on ASTNode. */
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 union 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 union type (element type: {@link Type})
*/
public List types() {
return this.types;
}
/* (omit javadoc for this method) Method declared on ASTNode. */
int memSize() {
return BASE_NODE_SIZE + 1 * 4;
}
/* (omit javadoc for this method) Method declared on ASTNode. */
int treeSize() {
return memSize() + this.types.listSize();
}
}