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Copyright (c) 2000, 2010 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.List;

While statement AST node type.
 WhileStatement:
    while ( Expression ) Statement
 

Since:
2.0
Noinstantiate:
This class is not intended to be instantiated by clients.
 
 public class WhileStatement extends Statement {

The "expression" structural property of this node type (child type: Expression).

Since:
3.0
 
 	public static final ChildPropertyDescriptor EXPRESSION_PROPERTY =
 		new ChildPropertyDescriptor(WhileStatement.class"expression"Expression.class); //$NON-NLS-1$
 
The "body" structural property of this node type (child type: Statement).

Since:
3.0
 
 	public static final ChildPropertyDescriptor BODY_PROPERTY =
 		new ChildPropertyDescriptor(WhileStatement.class"body"Statement.class); //$NON-NLS-1$
 
A list of property descriptors (element type: StructuralPropertyDescriptor), or null if uninitialized.
 
 	private static final List PROPERTY_DESCRIPTORS;
 
 	static {
 		List propertyList = new ArrayList(3);
 		createPropertyList(WhileStatement.classpropertyList);
 		addProperty(propertyList);
 	}

Returns a list of structural property descriptors for this node type. Clients must not modify the result.

Parameters:
apiLevel the API level; one of the AST.JLS* constants
Returns:
a list of property descriptors (element type: StructuralPropertyDescriptor)
Since:
3.0
 
 	public static List propertyDescriptors(int apiLevel) {
 	}

The expression; lazily initialized; defaults to an unspecified, but legal, expression.
 
 	private Expression expression = null;

The body statement; lazily initialized; defaults to an empty block statement.
 
 	private Statement body = null;

Creates a new unparented while statement node owned by the given AST. By default, the expresssion is unspecified, but legal, and the body statement is an empty block.

N.B. This constructor is package-private.

Parameters:
ast the AST that is to own this node
 
 	WhileStatement(AST ast) {
 		super(ast);
 	}
 
	/* (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 propertyboolean getASTNode child) {
		if (property == ) {
			if (get) {
				return getExpression();
else {
				return null;
			}
		}
		if (property == ) {
			if (get) {
				return getBody();
else {
				setBody((Statementchild);
				return null;
			}
		}
		// allow default implementation to flag the error
		return super.internalGetSetChildProperty(propertygetchild);
	}
	/* (omit javadoc for this method)
	 * Method declared on ASTNode.
	 */
	final int getNodeType0() {
	}
	/* (omit javadoc for this method)
	 * Method declared on ASTNode.
	 */
	ASTNode clone0(AST target) {
		WhileStatement result = new WhileStatement(target);
		result.copyLeadingComment(this);
		result.setBody((StatementgetBody().clone(target));
		return result;
	}
	/* (omit javadoc for this method)
	 * Method declared on ASTNode.
	 */
	final boolean subtreeMatch0(ASTMatcher matcherObject other) {
		// dispatch to correct overloaded match method
		return matcher.match(thisother);
	}
	/* (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(visitorgetBody());
		}
		visitor.endVisit(this);
	}

Returns the expression of this while statement.

Returns:
the expression node
		if (this. == null) {
			// lazy init must be thread-safe for readers
			synchronized (this) {
				if (this. == null) {
					this. = new SimpleName(this.);
				}
			}
		}
		return this.;
	}

Sets the expression of this while statement.

Parameters:
expression the expression node
Throws:
java.lang.IllegalArgumentException if:
  • the node belongs to a different AST
  • the node already has a parent
  • a cycle in would be created
	public void setExpression(Expression expression) {
		if (expression == null) {
		}
		ASTNode oldChild = this.;
		preReplaceChild(oldChildexpression);
		this. = expression;
		postReplaceChild(oldChildexpression);
	}

Returns the body of this while statement.

Returns:
the body statement node
	public Statement getBody() {
		if (this. == null) {
			// lazy init must be thread-safe for readers
			synchronized (this) {
				if (this. == null) {
					this. = new Block(this.);
				}
			}
		}
		return this.;
	}

Sets the body of this while statement.

Special note: The Java language does not allow a local variable declaration to appear as the body of a while statement (they may only appear within a block). However, the AST will allow a VariableDeclarationStatement as the body of a WhileStatement. To get something that will compile, be sure to embed the VariableDeclarationStatement inside a Block.

Parameters:
statement the body statement node
Throws:
java.lang.IllegalArgumentException if:
  • the node belongs to a different AST
  • the node already has a parent
  • a cycle in would be created
	public void setBody(Statement statement) {
		if (statement == null) {
		}
		ASTNode oldChild = this.;
		preReplaceChild(oldChildstatement);
		this. = statement;
		postReplaceChild(oldChildstatement);
	}
	/* (omit javadoc for this method)
	 * Method declared on ASTNode.
	 */
	int memSize() {
		return super.memSize() + 2 * 4;
	}
	/* (omit javadoc for this method)
	 * Method declared on ASTNode.
	 */
	int treeSize() {
		return
			+ (this. == null ? 0 : getExpression().treeSize())
			+ (this. == null ? 0 : getBody().treeSize());
	}
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