/******************************************************************************* * 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 parameter node (added in JLS3 API). *
* TypeParameter: * TypeVariable [ extends Type { & Type } ] ** * @since 3.1 * @noinstantiate This class is not intended to be instantiated by clients. */ 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 *
AST.JLS*
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: Type
).
* 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.
* * N.B. This constructor is package-private. *
* * @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. ** Note that bindings are generally unavailable unless requested when the * AST is being built. *
* * @return the binding, ornull
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:
* Type
)
*/
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();
}
}