| /******************************************************************************* |
| * Copyright (c) 2003, 2005 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.jdt.core.dom; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Type parameter node (added in JLS3 API). |
| * <pre> |
| * TypeParameter: |
| * TypeVariable [ <b>extends</b> Type { <b>&</b> Type } ] |
| * </pre> |
| * |
| * @since 3.1 |
| */ |
| public class TypeParameter extends ASTNode { |
| |
| /** |
| * The "name" structural property of this node type. |
| */ |
| public static final ChildPropertyDescriptor NAME_PROPERTY = |
| new ChildPropertyDescriptor(TypeParameter.class, "name", SimpleName.class, MANDATORY, NO_CYCLE_RISK); //$NON-NLS-1$ |
| |
| /** |
| * The "typeBounds" structural property of this node type. |
| */ |
| public static final ChildListPropertyDescriptor TYPE_BOUNDS_PROPERTY = |
| new ChildListPropertyDescriptor(TypeParameter.class, "typeBounds", Type.class, NO_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(3); |
| createPropertyList(TypeParameter.class, propertyList); |
| addProperty(NAME_PROPERTY, propertyList); |
| addProperty(TYPE_BOUNDS_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 type variable node; lazily initialized; defaults to an unspecfied, |
| * but legal, name. |
| */ |
| private SimpleName typeVariableName = null; |
| |
| /** |
| * The type bounds (element type: <code>Type</code>). |
| * Defaults to an empty list. |
| */ |
| private ASTNode.NodeList typeBounds = |
| new ASTNode.NodeList(TYPE_BOUNDS_PROPERTY); |
| |
| /** |
| * Creates a new unparented node for a parameterized type owned by the |
| * given AST. By default, an unspecified, but legal, type variable name, |
| * and no type bounds. |
| * <p> |
| * N.B. This constructor is package-private. |
| * </p> |
| * |
| * @param ast the AST that is to own this node |
| */ |
| TypeParameter(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 ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) { |
| if (property == NAME_PROPERTY) { |
| if (get) { |
| return getName(); |
| } else { |
| setName((SimpleName) 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 List internalGetChildListProperty(ChildListPropertyDescriptor property) { |
| if (property == TYPE_BOUNDS_PROPERTY) { |
| return typeBounds(); |
| } |
| // allow default implementation to flag the error |
| return super.internalGetChildListProperty(property); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| final int getNodeType0() { |
| return TYPE_PARAMETER; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| ASTNode clone0(AST target) { |
| TypeParameter result = new TypeParameter(target); |
| result.setSourceRange(this.getStartPosition(), this.getLength()); |
| result.setName((SimpleName) ((ASTNode) getName()).clone(target)); |
| result.typeBounds().addAll( |
| ASTNode.copySubtrees(target, typeBounds())); |
| 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, getName()); |
| acceptChildren(visitor, this.typeBounds); |
| } |
| visitor.endVisit(this); |
| } |
| |
| /** |
| * Returns the name of the type variable declared in this type parameter. |
| * |
| * @return the name of the type variable |
| */ |
| public SimpleName getName() { |
| if (this.typeVariableName == null) { |
| // lazy init must be thread-safe for readers |
| synchronized (this) { |
| if (this.typeVariableName == null) { |
| preLazyInit(); |
| this.typeVariableName = new SimpleName(this.ast); |
| postLazyInit(this.typeVariableName, NAME_PROPERTY); |
| } |
| } |
| } |
| return this.typeVariableName; |
| } |
| |
| /** |
| * Resolves and returns the binding for this type parameter. |
| * <p> |
| * Note that bindings are generally unavailable unless requested when the |
| * AST is being built. |
| * </p> |
| * |
| * @return the binding, or <code>null</code> if the binding cannot be |
| * resolved |
| */ |
| public final ITypeBinding resolveBinding() { |
| return this.ast.getBindingResolver().resolveTypeParameter(this); |
| } |
| |
| /** |
| * Sets the name of the type variable of this type parameter to the given |
| * name. |
| * |
| * @param typeName the new name of this type parameter |
| * @exception IllegalArgumentException if: |
| * <ul> |
| * <li>the node belongs to a different AST</li> |
| * <li>the node already has a parent</li> |
| * </ul> |
| */ |
| public void setName(SimpleName typeName) { |
| if (typeName == null) { |
| throw new IllegalArgumentException(); |
| } |
| ASTNode oldChild = this.typeVariableName; |
| preReplaceChild(oldChild, typeName, NAME_PROPERTY); |
| this.typeVariableName = typeName; |
| postReplaceChild(oldChild, typeName, NAME_PROPERTY); |
| } |
| |
| /** |
| * Returns the live ordered list of type bounds of this type parameter. |
| * For the type parameter to be plausible, there can be at most one |
| * class in the list, and it must be first, and the remaining ones must be |
| * interfaces; the list should not contain primitive types (but array types |
| * and parameterized types are allowed). |
| * |
| * @return the live list of type bounds |
| * (element type: <code>Type</code>) |
| */ |
| public List typeBounds() { |
| return this.typeBounds; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| int memSize() { |
| // treat Code as free |
| return BASE_NODE_SIZE + 2 * 4; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| int treeSize() { |
| return |
| memSize() |
| + (this.typeVariableName == null ? 0 : getName().treeSize()) |
| + this.typeBounds.listSize(); |
| } |
| } |
| |