org.eclipse.jdt.core.dom.TypePattern Maven / Gradle / Ivy
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/*******************************************************************************
* Copyright (c) 2021, 2023 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.Arrays;
import java.util.List;
import org.eclipse.jdt.internal.core.dom.util.DOMASTUtil;
/**
* TypePattern pattern AST node type.
*
*
* TypePattern:
* SingleVariableDeclaration
*
*
* @since 3.27
* @noinstantiate This class is not intended to be instantiated by clients.
* @noreference This class is not intended to be referenced by clients.
*/
@SuppressWarnings("rawtypes")
public class TypePattern extends Pattern {
/**
* The "patternVariable" structural property of this node type (child type: {@link SingleVariableDeclaration}).
*/
public static final ChildPropertyDescriptor PATTERN_VARIABLE_PROPERTY =
new ChildPropertyDescriptor(TypePattern.class, "patternVariable", SingleVariableDeclaration.class, MANDATORY, 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 properyList = new ArrayList(3);
createPropertyList(TypePattern.class, properyList);
addProperty(PATTERN_VARIABLE_PROPERTY, properyList);
PROPERTY_DESCRIPTORS = reapPropertyList(properyList);
}
@Override
int getNodeType0() {
return ASTNode.TYPE_PATTERN;
}
TypePattern(AST ast) {
super(ast);
supportedOnlyIn21();
}
/**
* The pattern Variable list; empty
for none;
*/
private SingleVariableDeclaration patternVariable = null;
/**
* 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})
* @noreference This method is not intended to be referenced by clients.
*/
public static List propertyDescriptors(int apiLevel) {
return null;
}
/**
* 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
* @param previewEnabled the previewEnabled flag
* @return a list of property descriptors (element type:
* {@link StructuralPropertyDescriptor})
* @noreference This method is not intended to be referenced by clients.
*/
public static List propertyDescriptors(int apiLevel, boolean previewEnabled) {
if (DOMASTUtil.isPatternSupported(apiLevel, previewEnabled)) {
return PROPERTY_DESCRIPTORS;
}
return null;
}
@Override
final List internalStructuralPropertiesForType(int apiLevel) {
return propertyDescriptors(apiLevel);
}
@Override
final List internalStructuralPropertiesForType(int apiLevel, boolean previewEnabled) {
return propertyDescriptors(apiLevel, previewEnabled);
}
@Override
final ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) {
if (property == PATTERN_VARIABLE_PROPERTY ) {
return getPatternVariable();
}
// allow default implementation to flag the error
return super.internalGetSetChildProperty(property, get, child);
}
public List patternVariables() {
supportedOnlyIn20();
return new ArrayList<>(Arrays.asList(getPatternVariable()));
}
/**
* Sets the pattern variable.
*
* @param patternVariable the right operand node
* @exception IllegalArgumentException if:
*
* - the node belongs to a different AST
* - the node already has a parent
* - a cycle in would be created
*
* @exception UnsupportedOperationException if this operation is used other than JLS19
* @exception UnsupportedOperationException if this expression is used with previewEnabled flag as false
* @noreference This method is not intended to be referenced by clients as it is a part of Java preview feature.
*/
public void setPatternVariable(SingleVariableDeclaration patternVariable) {
supportedOnlyIn20();
if (patternVariable == null) {
throw new IllegalArgumentException();
}
ASTNode oldChild = this.patternVariable;
preReplaceChild(oldChild, patternVariable, PATTERN_VARIABLE_PROPERTY);
this.patternVariable = patternVariable;
postReplaceChild(oldChild, patternVariable, PATTERN_VARIABLE_PROPERTY);
}
/**
* Returns the pattern variable of Types Pattern.
*
* @return the pattern variable
* @exception UnsupportedOperationException if this operation is used other than JLS19
* @exception UnsupportedOperationException if this expression is used with previewEnabled flag as false
* @noreference This method is not intended to be referenced by clients as it is a part of Java preview feature.
*/
public SingleVariableDeclaration getPatternVariable() {
supportedOnlyIn20();
if (this.patternVariable == null) {
// lazy init must be thread-safe for readers
synchronized (this) {
if (this.patternVariable == null) {
preLazyInit();
this.patternVariable= new SingleVariableDeclaration(this.ast);
postLazyInit(this.patternVariable, PATTERN_VARIABLE_PROPERTY);
}
}
}
return this.patternVariable;
}
@Override
boolean subtreeMatch0(ASTMatcher matcher, Object other) {
return matcher.match(this, other);
}
@Override
ASTNode clone0(AST target) {
TypePattern result = new TypePattern(target);
result.setSourceRange(getStartPosition(), getLength());
result.setPatternVariable((SingleVariableDeclaration) getPatternVariable().clone(target));
return result;
}
@Override
void accept0(ASTVisitor visitor) {
boolean visitChildren = visitor.visit(this);
if (visitChildren) {
// visit children in normal left to right reading order
acceptChild(visitor, getPatternVariable());
}
visitor.endVisit(this);
}
@Override
int memSize() {
return BASE_NODE_SIZE + 1 * 4;
}
@Override
int treeSize() {
return
memSize()
+ (this.patternVariable == null ? 0 : getPatternVariable().treeSize());
}
}