Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2013 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; /** * Static or instance initializer AST node type. * <pre> * Initializer: * [ <b>static</b> ] Block * </pre> * * @since 2.0 * @noinstantiate This class is not intended to be instantiated by clients. */ @SuppressWarnings({ "rawtypes" }) public class Initializer extends BodyDeclaration { /** * The "javadoc" structural property of this node type (child type: {@link Javadoc}). * @since 3.0 */ public static final ChildPropertyDescriptor JAVADOC_PROPERTY = internalJavadocPropertyFactory( Initializer.class); /** * The "modifiers" structural property of this node type (type: {@link Integer}) (JLS2 API only). * @since 3.0 * @deprecated In the JLS3 API, this property is replaced by {@link #MODIFIERS2_PROPERTY}. */ public static final SimplePropertyDescriptor MODIFIERS_PROPERTY = internalModifiersPropertyFactory( Initializer.class); /** * The "modifiers" structural property of this node type (element type: {@link IExtendedModifier}) (added in JLS3 API). * @since 3.1 */ public static final ChildListPropertyDescriptor MODIFIERS2_PROPERTY = internalModifiers2PropertyFactory( Initializer.class); /** * The "body" structural property of this node type (child type: {@link Block}). * @since 3.0 */ public static final ChildPropertyDescriptor BODY_PROPERTY = new ChildPropertyDescriptor(Initializer.class, "body", Block.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$ /** * A list of property descriptors (element type: * {@link StructuralPropertyDescriptor}), * or null if uninitialized. * @since 3.0 */ private static final List PROPERTY_DESCRIPTORS_2_0; /** * A list of property descriptors (element type: * {@link StructuralPropertyDescriptor}), * or null if uninitialized. * @since 3.1 */ private static final List PROPERTY_DESCRIPTORS_3_0; static { List properyList = new ArrayList(4); createPropertyList(Initializer.class, properyList); addProperty(JAVADOC_PROPERTY, properyList); addProperty(MODIFIERS_PROPERTY, properyList); addProperty(BODY_PROPERTY, properyList); PROPERTY_DESCRIPTORS_2_0 = reapPropertyList(properyList); properyList = new ArrayList(4); createPropertyList(Initializer.class, properyList); addProperty(JAVADOC_PROPERTY, properyList); addProperty(MODIFIERS2_PROPERTY, properyList); addProperty(BODY_PROPERTY, properyList); PROPERTY_DESCRIPTORS_3_0 = reapPropertyList(properyList); } /** * 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}) * @since 3.0 */ public static List propertyDescriptors(int apiLevel) { if (apiLevel == AST.JLS2_INTERNAL) { return PROPERTY_DESCRIPTORS_2_0; } else { return PROPERTY_DESCRIPTORS_3_0; } } /** * The initializer body; lazily initialized; defaults to an empty block. */ private Block body = null; /** * Creates a new AST node for an initializer declaration owned by the given * AST. By default, the initializer has no modifiers and an empty block. * The javadoc comment is not used for initializers. * <p> * N.B. This constructor is package-private. * </p> * * @param ast the AST that is to own this node */ Initializer(AST ast) { super(ast); } /* (omit javadoc for this method) * Method declared on ASTNode. * @since 3.0 */ @Override final List internalStructuralPropertiesForType(int apiLevel) { return propertyDescriptors(apiLevel); } @Override final int internalGetSetIntProperty(SimplePropertyDescriptor property, boolean get, int value) { if (property == MODIFIERS_PROPERTY) { if (get) { return getModifiers(); } else { internalSetModifiers(value); return 0; } } // allow default implementation to flag the error return super.internalGetSetIntProperty(property, get, value); } @Override final ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) { if (property == JAVADOC_PROPERTY) { if (get) { return getJavadoc(); } else { setJavadoc((Javadoc) child); return null; } } if (property == BODY_PROPERTY) { if (get) { return getBody(); } else { setBody((Block) child); return null; } } // allow default implementation to flag the error return super.internalGetSetChildProperty(property, get, child); } @Override final List internalGetChildListProperty(ChildListPropertyDescriptor property) { if (property == MODIFIERS2_PROPERTY) { return modifiers(); } // allow default implementation to flag the error return super.internalGetChildListProperty(property); } @Override final ChildPropertyDescriptor internalJavadocProperty() { return JAVADOC_PROPERTY; } @Override final ChildListPropertyDescriptor internalModifiers2Property() { return MODIFIERS2_PROPERTY; } @Override final SimplePropertyDescriptor internalModifiersProperty() { return MODIFIERS_PROPERTY; } @Override final int getNodeType0() { return INITIALIZER; } @Override ASTNode clone0(AST target) { Initializer result = new Initializer(target); result.setSourceRange(getStartPosition(), getLength()); if (this.ast.apiLevel == AST.JLS2_INTERNAL) { result.internalSetModifiers(getModifiers()); } if (this.ast.apiLevel >= AST.JLS3_INTERNAL) { result.modifiers().addAll(ASTNode.copySubtrees(target, modifiers())); } result.setJavadoc((Javadoc) ASTNode.copySubtree(target, getJavadoc())); result.setBody((Block) getBody().clone(target)); 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) { acceptChild(visitor, getJavadoc()); if (this.ast.apiLevel >= AST.JLS3_INTERNAL) { acceptChildren(visitor, this.modifiers); } acceptChild(visitor, getBody()); } visitor.endVisit(this); } /** * Returns the body of this initializer declaration. * * @return the initializer body */ public Block getBody() { if (this.body == null) { // lazy init must be thread-safe for readers synchronized (this) { if (this.body == null) { preLazyInit(); this.body = new Block(this.ast); postLazyInit(this.body, BODY_PROPERTY); } } } return this.body; } /** * Sets the body of this initializer declaration. * * @param body the block node * @exception IllegalArgumentException if: * <ul> * <li>the node belongs to a different AST</li> * <li>the node already has a parent</li> * <li>a cycle in would be created</li> * </ul> */ public void setBody(Block body) { if (body == null) { throw new IllegalArgumentException(); } ASTNode oldChild = this.body; preReplaceChild(oldChild, body, BODY_PROPERTY); this.body = body; postReplaceChild(oldChild, body, BODY_PROPERTY); } @Override int memSize() { return super.memSize() + 1 * 4; } @Override int treeSize() { return memSize() + (this.optionalDocComment == null ? 0 : getJavadoc().treeSize()) + (this.modifiers == null ? 0 : this.modifiers.listSize()) + (this.body == null ? 0 : getBody().treeSize()); } }