--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2003, 2008 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 net.sourceforge.phpdt.core.dom;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Type node for a wildcard type (added in JLS3 API).
+ * <pre>
+ * WildcardType:
+ * <b>?</b> [ ( <b>extends</b> | <b>super</b>) Type ]
+ * </pre>
+ * <p>
+ * Not all node arrangements will represent legal Java constructs. In particular,
+ * it is nonsense if a wildcard type node appears anywhere other than as an
+ * argument of a <code>ParameterizedType</code> node.
+ * </p>
+ *
+ * @since 3.1
+ * @noinstantiate This class is not intended to be instantiated by clients.
+ */
+public class WildcardType extends Type {
+
+ /**
+ * The "bound" structural property of this node type.
+ */
+ public static final ChildPropertyDescriptor BOUND_PROPERTY =
+ new ChildPropertyDescriptor(WildcardType.class, "bound", Type.class, OPTIONAL, CYCLE_RISK); //$NON-NLS-1$
+
+ /**
+ * The "upperBound" structural property of this node type.
+ */
+ public static final SimplePropertyDescriptor UPPER_BOUND_PROPERTY =
+ new SimplePropertyDescriptor(WildcardType.class, "upperBound", boolean.class, MANDATORY); //$NON-NLS-1$
+
+ /**
+ * A list of property descriptors (element type:
+ * {@link StructuralPropertyDescriptor}),
+ * or null if uninitialized.
+ */
+ private static final List PROPERTY_DESCRIPTORS;
+
+ static {
+ List propertyList = new ArrayList(3);
+ createPropertyList(WildcardType.class, propertyList);
+ addProperty(BOUND_PROPERTY, propertyList);
+ addProperty(UPPER_BOUND_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 optional type bound node; <code>null</code> if none;
+ * defaults to none.
+ */
+ private Type optionalBound = null;
+
+ /**
+ * Indicates whether the wildcard bound is an upper bound
+ * ("extends") as opposed to a lower bound ("super").
+ * Defaults to <code>true</code> initially.
+ */
+ private boolean isUpperBound = true;
+
+ /**
+ * Creates a new unparented node for a wildcard type owned by the
+ * given AST. By default, no upper bound.
+ * <p>
+ * N.B. This constructor is package-private.
+ * </p>
+ *
+ * @param ast the AST that is to own this node
+ */
+ WildcardType(AST ast) {
+ super(ast);
+ unsupportedIn2();
+ }
+
+ /* (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 boolean internalGetSetBooleanProperty(SimplePropertyDescriptor property, boolean get, boolean value) {
+ if (property == UPPER_BOUND_PROPERTY) {
+ if (get) {
+ return isUpperBound();
+ } else {
+ setUpperBound(value);
+ return false;
+ }
+ }
+ // allow default implementation to flag the error
+ return super.internalGetSetBooleanProperty(property, get, value);
+ }
+
+ /* (omit javadoc for this method)
+ * Method declared on ASTNode.
+ */
+ final ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) {
+ if (property == BOUND_PROPERTY) {
+ if (get) {
+ return getBound();
+ } else {
+ setBound((Type) child);
+ return null;
+ }
+ }
+ // allow default implementation to flag the error
+ return super.internalGetSetChildProperty(property, get, child);
+ }
+
+ /* (omit javadoc for this method)
+ * Method declared on ASTNode.
+ */
+ final int getNodeType0() {
+ return WILDCARD_TYPE;
+ }
+
+ /* (omit javadoc for this method)
+ * Method declared on ASTNode.
+ */
+ ASTNode clone0(AST target) {
+ WildcardType result = new WildcardType(target);
+ result.setSourceRange(this.getStartPosition(), this.getLength());
+ result.setBound((Type) ASTNode.copySubtree(target, getBound()), isUpperBound());
+ 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
+ acceptChild(visitor, getBound());
+ }
+ visitor.endVisit(this);
+ }
+
+ /**
+ * Returns whether this wildcard type is an upper bound
+ * ("extends") as opposed to a lower bound ("super").
+ * <p>
+ * Note that this property is irrelevant for wildcards
+ * that do not have a bound.
+ * </p>
+ *
+ * @return <code>true</code> if an upper bound,
+ * and <code>false</code> if a lower bound
+ * @see #setBound(Type)
+ */
+ public boolean isUpperBound() {
+ return this.isUpperBound;
+ }
+
+ /**
+ * Returns the bound of this wildcard type if it has one.
+ * If {@link #isUpperBound isUpperBound} returns true, this
+ * is an upper bound ("? extends B"); if it returns false, this
+ * is a lower bound ("? super B").
+ *
+ * @return the bound of this wildcard type, or <code>null</code>
+ * if none
+ * @see #setBound(Type)
+ */
+ public Type getBound() {
+ return this.optionalBound;
+ }
+
+ /**
+ * Sets the bound of this wildcard type to the given type and
+ * marks it as an upper or a lower bound. The method is
+ * equivalent to calling <code>setBound(type); setUpperBound(isUpperBound)</code>.
+ *
+ * @param type the new bound of this wildcard type, or <code>null</code>
+ * if none
+ * @param isUpperBound <code>true</code> for an upper bound ("? extends B"),
+ * and <code>false</code> for a lower bound ("? super B")
+ * @exception IllegalArgumentException if:
+ * <ul>
+ * <li>the node belongs to a different AST</li>
+ * <li>the node already has a parent</li>
+ * </ul>
+ * @see #getBound()
+ * @see #isUpperBound()
+ */
+ public void setBound(Type type, boolean isUpperBound) {
+ setBound(type);
+ setUpperBound(isUpperBound);
+ }
+
+ /**
+ * Sets the bound of this wildcard type to the given type.
+ *
+ * @param type the new bound of this wildcard type, or <code>null</code>
+ * if none
+ * @exception IllegalArgumentException if:
+ * <ul>
+ * <li>the node belongs to a different AST</li>
+ * <li>the node already has a parent</li>
+ * </ul>
+ * @see #getBound()
+ */
+ public void setBound(Type type) {
+ ASTNode oldChild = this.optionalBound;
+ preReplaceChild(oldChild, type, BOUND_PROPERTY);
+ this.optionalBound = type;
+ postReplaceChild(oldChild, type, BOUND_PROPERTY);
+ }
+
+ /**
+ * Sets whether this wildcard type is an upper bound
+ * ("extends") as opposed to a lower bound ("super").
+ *
+ * @param isUpperBound <code>true</code> if an upper bound,
+ * and <code>false</code> if a lower bound
+ * @see #isUpperBound()
+ */
+ public void setUpperBound(boolean isUpperBound) {
+ preValueChange(UPPER_BOUND_PROPERTY);
+ this.isUpperBound = isUpperBound;
+ postValueChange(UPPER_BOUND_PROPERTY);
+ }
+
+ /* (omit javadoc for this method)
+ * Method declared on ASTNode.
+ */
+ int memSize() {
+ return BASE_NODE_SIZE + 2 * 4;
+ }
+
+ /* (omit javadoc for this method)
+ * Method declared on ASTNode.
+ */
+ int treeSize() {
+ return
+ memSize()
+ + (this.optionalBound == null ? 0 : getBound().treeSize());
+ }
+}
+
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