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
/*******************************************************************************
* 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;
Do statement AST node type.
DoStatement:
do Statement while ( Expression ) ;
Since: 2.0 @noinstantiate This class is not intended to be instantiated by clients.
/**
* Do statement AST node type.
*
* <pre>
* DoStatement:
* <b>do</b> Statement <b>while</b> <b>(</b> Expression <b>)</b> <b>;</b>
* </pre>
*
* @since 2.0
* @noinstantiate This class is not intended to be instantiated by clients.
*/
@SuppressWarnings("rawtypes")
public class DoStatement extends Statement {
The "body" structural property of this node type (child type: Statement
). Since: 3.0
/**
* The "body" structural property of this node type (child type: {@link Statement}).
* @since 3.0
*/
public static final ChildPropertyDescriptor BODY_PROPERTY =
new ChildPropertyDescriptor(DoStatement.class, "body", Statement.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$
The "expression" structural property of this node type (child type: Expression
). Since: 3.0
/**
* The "expression" structural property of this node type (child type: {@link Expression}).
* @since 3.0
*/
public static final ChildPropertyDescriptor EXPRESSION_PROPERTY =
new ChildPropertyDescriptor(DoStatement.class, "expression", Expression.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$
A list of property descriptors (element type: StructuralPropertyDescriptor
), or null if uninitialized. /**
* A list of property descriptors (element type:
* {@link StructuralPropertyDescriptor}),
* or null if uninitialized.
*/
private static final List PROPERTY_DESCRIPTORS;
static {
List properyList = new ArrayList(3);
createPropertyList(DoStatement.class, properyList);
addProperty(BODY_PROPERTY, properyList);
addProperty(EXPRESSION_PROPERTY, properyList);
PROPERTY_DESCRIPTORS = reapPropertyList(properyList);
}
Returns a list of structural property descriptors for this node type.
Clients must not modify the result.
Params: - apiLevel – the API level; one of the
AST.JLS*
constants
Returns: a list of property descriptors (element type: StructuralPropertyDescriptor
) Since: 3.0
/**
* 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) {
return PROPERTY_DESCRIPTORS;
}
The body statement; lazily initialized; defaults to an empty block.
/**
* The body statement; lazily initialized; defaults to an empty block.
*/
private Statement body = null;
The expression; lazily initialized; defaults to an unspecified, but
legal, expression.
/**
* The expression; lazily initialized; defaults to an unspecified, but
* legal, expression.
*/
private Expression expression = null;
Creates a new unparented do statement node owned by the given
AST. By default, the expression is unspecified, but legal,
and the body statement is an empty block.
N.B. This constructor is package-private.
Params: - ast – the AST that is to own this node
/**
* Creates a new unparented do statement node owned by the given
* AST. By default, the expression is unspecified, but legal,
* and the body statement is an empty block.
* <p>
* N.B. This constructor is package-private.
* </p>
*
* @param ast the AST that is to own this node
*/
DoStatement(AST ast) {
super(ast);
}
@Override
final List internalStructuralPropertiesForType(int apiLevel) {
return propertyDescriptors(apiLevel);
}
@Override
final ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) {
if (property == BODY_PROPERTY) {
if (get) {
return getBody();
} else {
setBody((Statement) child);
return null;
}
}
if (property == EXPRESSION_PROPERTY) {
if (get) {
return getExpression();
} else {
setExpression((Expression) child);
return null;
}
}
// allow default implementation to flag the error
return super.internalGetSetChildProperty(property, get, child);
}
@Override
final int getNodeType0() {
return DO_STATEMENT;
}
@Override
ASTNode clone0(AST target) {
DoStatement result = new DoStatement(target);
result.setSourceRange(getStartPosition(), getLength());
result.copyLeadingComment(this);
result.setBody((Statement) getBody().clone(target));
result.setExpression((Expression) getExpression().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) {
// visit children in normal left to right reading order
acceptChild(visitor, getBody());
acceptChild(visitor, getExpression());
}
visitor.endVisit(this);
}
Returns the body of this do statement.
Returns: the body statement node
/**
* Returns the body of this do statement.
*
* @return the body statement node
*/
public Statement 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 do statement.
Special note: The Java language does not allow a local variable declaration
to appear as the body of a do statement (they may only appear within a
block). However, the AST will allow a VariableDeclarationStatement
as the body of a DoStatement
. To get something that will
compile, be sure to embed the VariableDeclarationStatement
inside a Block
.
Params: - statement – the body statement node
Throws: - IllegalArgumentException – if:
- the node belongs to a different AST
- the node already has a parent
- a cycle in would be created
/**
* Sets the body of this do statement.
* <p>
* Special note: The Java language does not allow a local variable declaration
* to appear as the body of a do statement (they may only appear within a
* block). However, the AST will allow a <code>VariableDeclarationStatement</code>
* as the body of a <code>DoStatement</code>. To get something that will
* compile, be sure to embed the <code>VariableDeclarationStatement</code>
* inside a <code>Block</code>.
* </p>
*
* @param statement the body statement 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(Statement statement) {
if (statement == null) {
throw new IllegalArgumentException();
}
ASTNode oldChild = this.body;
preReplaceChild(oldChild, statement, BODY_PROPERTY);
this.body = statement;
postReplaceChild(oldChild, statement, BODY_PROPERTY);
}
Returns the expression of this do statement.
Returns: the expression node
/**
* Returns the expression of this do statement.
*
* @return the expression node
*/
public Expression getExpression() {
if (this.expression == null) {
// lazy init must be thread-safe for readers
synchronized (this) {
if (this.expression == null) {
preLazyInit();
this.expression = new SimpleName(this.ast);
postLazyInit(this.expression, EXPRESSION_PROPERTY);
}
}
}
return this.expression;
}
Sets the expression of this do statement.
Params: - expression – the expression node
Throws: - IllegalArgumentException – if:
- the node belongs to a different AST
- the node already has a parent
- a cycle in would be created
/**
* Sets the expression of this do statement.
*
* @param expression the expression 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 setExpression(Expression expression) {
if (expression == null) {
throw new IllegalArgumentException();
}
ASTNode oldChild = this.expression;
preReplaceChild(oldChild, expression, EXPRESSION_PROPERTY);
this.expression = expression;
postReplaceChild(oldChild, expression, EXPRESSION_PROPERTY);
}
@Override
int memSize() {
return super.memSize() + 2 * 4;
}
@Override
int treeSize() {
return
memSize()
+ (this.expression == null ? 0 : getExpression().treeSize())
+ (this.body == null ? 0 : getBody().treeSize());
}
}