org.eclipse.jdt.core.dom.ContinueStatement.java Source code

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Here is the source code for org.eclipse.jdt.core.dom.ContinueStatement.java

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/*******************************************************************************
 * 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;

/**
 * Continue statement AST node type.
 *
 * <pre>
 * ContinueStatement:
 *    <b>continue</b> [ Identifier ] <b>;</b>
 * </pre>
 *
 * @since 2.0
 * @noinstantiate This class is not intended to be instantiated by clients.
 */
@SuppressWarnings("rawtypes")
public class ContinueStatement extends Statement {

    /**
     * The "label" structural property of this node type (child type: {@link SimpleName}).
     * @since 3.0
     */
    public static final ChildPropertyDescriptor LABEL_PROPERTY = new ChildPropertyDescriptor(
            ContinueStatement.class, "label", SimpleName.class, OPTIONAL, 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 properyList = new ArrayList(2);
        createPropertyList(ContinueStatement.class, properyList);
        addProperty(LABEL_PROPERTY, properyList);
        PROPERTY_DESCRIPTORS = 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) {
        return PROPERTY_DESCRIPTORS;
    }

    /**
     * The label, or <code>null</code> if none; none by default.
     */
    private SimpleName optionalLabel = null;

    /**
     * Creates a new unparented continue statement node owned by the given
     * AST. By default, the continue statement has no label.
     * <p>
     * N.B. This constructor is package-private.
     * </p>
     *
     * @param ast the AST that is to own this node
     */
    ContinueStatement(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 == LABEL_PROPERTY) {
            if (get) {
                return getLabel();
            } else {
                setLabel((SimpleName) child);
                return null;
            }
        }
        // allow default implementation to flag the error
        return super.internalGetSetChildProperty(property, get, child);
    }

    @Override
    final int getNodeType0() {
        return CONTINUE_STATEMENT;
    }

    @Override
    ASTNode clone0(AST target) {
        ContinueStatement result = new ContinueStatement(target);
        result.setSourceRange(getStartPosition(), getLength());
        result.copyLeadingComment(this);
        result.setLabel((SimpleName) ASTNode.copySubtree(target, getLabel()));
        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, getLabel());
        }
        visitor.endVisit(this);
    }

    /**
     * Returns the label of this continue statement, or <code>null</code> if
     * there is none.
     *
     * @return the label, or <code>null</code> if there is none
     */
    public SimpleName getLabel() {
        return this.optionalLabel;
    }

    /**
     * Sets or clears the label of this continue statement.
     *
     * @param label the label, or <code>null</code> if
     *    there is none
     * @exception IllegalArgumentException if:
     * <ul>
     * <li>the node belongs to a different AST</li>
     * <li>the node already has a parent</li>
     * </ul>
     */
    public void setLabel(SimpleName label) {
        ASTNode oldChild = this.optionalLabel;
        preReplaceChild(oldChild, label, LABEL_PROPERTY);
        this.optionalLabel = label;
        postReplaceChild(oldChild, label, LABEL_PROPERTY);
    }

    @Override
    int memSize() {
        return super.memSize() + 1 * 4;
    }

    @Override
    int treeSize() {
        return memSize() + (this.optionalLabel == null ? 0 : getLabel().treeSize());
    }
}