| /* |
| * Copyright (c) 2011, 2021 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // Oracle - initial API and implementation |
| // |
| package org.eclipse.persistence.jpa.jpql.tools.model.query; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import org.eclipse.persistence.jpa.jpql.tools.spi.IEntity; |
| import static org.eclipse.persistence.jpa.jpql.parser.AbstractExpression.*; |
| |
| /** |
| * The abstract definition of a modify statement. TODO |
| * |
| * @see DeleteStatementStateObject |
| * @see UpdateStatementStateObject |
| * |
| * @version 2.4 |
| * @since 2.4 |
| * @author Pascal Filion |
| */ |
| @SuppressWarnings("nls") |
| public abstract class AbstractModifyStatementStateObject extends AbstractStateObject { |
| |
| /** |
| * The state object representing the modify clause. |
| */ |
| private AbstractModifyClauseStateObject modifyClause; |
| |
| /** |
| * The state object representing the <code><b>WHERE</b></code> clause. |
| */ |
| private WhereClauseStateObject whereClause; |
| |
| /** |
| * Notify the state object representing the <code><b>WHERE</b></code> clause has changed. |
| */ |
| public static final String WHERE_CLAUSE_PROPERTY = "whereClause"; |
| |
| /** |
| * Creates a new <code>AbstractModifyStatementStateObject</code>. |
| * |
| * @param parent The parent of this state object, which cannot be <code>null</code> |
| * @exception NullPointerException The given parent cannot be <code>null</code> |
| */ |
| protected AbstractModifyStatementStateObject(JPQLQueryStateObject parent) { |
| super(parent); |
| } |
| |
| @Override |
| protected void addChildren(List<StateObject> children) { |
| super.addChildren(children); |
| children.add(modifyClause); |
| if (whereClause != null) { |
| children.add(whereClause); |
| } |
| } |
| |
| /** |
| * Adds the <code><b>WHERE</b></code> clause. The clause is not added if it's already present. |
| * |
| * @return The {@link GroupByClauseStateObject} |
| */ |
| public WhereClauseStateObject addWhereClause() { |
| WhereClauseStateObject whereClause = new WhereClauseStateObject(this); |
| setWhereClause(whereClause); |
| return whereClause; |
| } |
| |
| /** |
| * Creates the actual {@link AbstractModifyClauseStateObject} that represents the modify clause. |
| * |
| * @return The modify clause part of this modify statement |
| */ |
| protected abstract AbstractModifyClauseStateObject buildModifyClause(); |
| |
| /** |
| * Returns the abstract schema name. |
| * |
| * @return The name of the abstract schema type for which the identification variable is ranging |
| * over |
| */ |
| public String getAbstractSchemaName() { |
| return getAbstractSchemaNameStateObject().getText(); |
| } |
| |
| /** |
| * Returns the {@link AbstractSchemaNameStateObject} holding onto the abstract schema name. |
| * |
| * @return The {@link AbstractSchemaNameStateObject}, which is never <code>null</code> |
| */ |
| public AbstractSchemaNameStateObject getAbstractSchemaNameStateObject() { |
| return getModifyClause().getAbstractSchemaNameStateObject(); |
| } |
| |
| @Override |
| public DeclarationStateObject getDeclaration() { |
| return modifyClause.getDeclaration(); |
| } |
| |
| /** |
| * Returns the actual {@link IEntity} that has the abstract schema name. |
| * |
| * @return The actual {@link IEntity} or <code>null</code> if no entity exists |
| */ |
| public IEntity getEntity() { |
| return getModifyClause().getEntity(); |
| } |
| |
| /** |
| * Returns the identification variable name that is ranging over the abstract schema type. |
| * |
| * @return The identification variable name |
| */ |
| public String getIdentificationVariable() { |
| return getModifyClause().getIdentificationVariable(); |
| } |
| |
| /** |
| * Returns the {@link IdentificationVariableStateObject} holding onto the identification variable. |
| * |
| * @return The {@link IdentificationVariableStateObject}, which is never <code>null</code> |
| */ |
| public IdentificationVariableStateObject getIdentificationVariableStateObject() { |
| return getModifyClause().getIdentificationVariableStateObject(); |
| } |
| |
| /** |
| * Returns the state object representing the modify clause part of the modify statement. |
| * |
| * @return The state object representing the modify clause part of the modify statement, which is |
| * never <code>null</code> |
| */ |
| public AbstractModifyClauseStateObject getModifyClause() { |
| return modifyClause; |
| } |
| |
| @Override |
| public JPQLQueryStateObject getParent() { |
| return (JPQLQueryStateObject) super.getParent(); |
| } |
| |
| /** |
| * Returns the {@link StateObject} that defines the range variable declaration. |
| * |
| * @return The {@link StateObject} that defines the range variable declaration, which is never |
| * <code>null</code> |
| */ |
| public RangeVariableDeclarationStateObject getRangeVariableDeclaration() { |
| return getModifyClause().getRangeVariableDeclaration(); |
| } |
| |
| /** |
| * Returns the state object representing the <code><b>WHERE</b></code> clause. |
| * |
| * @return Either the actual state object representing the <code><b>WHERE</b></code> clause or |
| * the <code>null</code> state object since <code>null</code> is never returned |
| */ |
| public WhereClauseStateObject getWhereClause() { |
| return whereClause; |
| } |
| |
| /** |
| * Returns the state object representing the <code><b>WHERE</b></code> clause. |
| * |
| * @return Either the actual state object representing the <code><b>WHERE</b></code> clause or |
| * <code>null</code> if it's not present |
| */ |
| public boolean hasWhereClause() { |
| return whereClause != null; |
| } |
| |
| @Override |
| protected void initialize() { |
| super.initialize(); |
| modifyClause = buildModifyClause(); |
| } |
| |
| @Override |
| public boolean isEquivalent(StateObject stateObject) { |
| |
| if (super.isEquivalent(stateObject)) { |
| AbstractModifyStatementStateObject clause = (AbstractModifyStatementStateObject) stateObject; |
| return modifyClause.isEquivalent(clause.modifyClause) && |
| areEquivalent(whereClause, clause.whereClause); |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Removes the <code><b>WHERE</b></code> clause. |
| */ |
| public void removeWhereClause() { |
| setWhereClause(null); |
| } |
| |
| /** |
| * Sets the given {@link StateObject} to be the conditional expression of the <code><b>WHERE</b></code> |
| * clause. |
| * |
| * @param conditionalStateObject The new conditional expression |
| */ |
| public void setConditionalStateObject(StateObject conditionalStateObject) { |
| if (!hasWhereClause()) { |
| addWhereClause(); |
| } |
| getWhereClause().setConditional(conditionalStateObject); |
| } |
| |
| /** |
| * Sets the abstract schema name to the given value. |
| * |
| * @param entity The {@link IEntity} that this clause will range over |
| */ |
| public void setDeclaration(IEntity entity) { |
| getModifyClause().setDeclaration(entity); |
| } |
| |
| /** |
| * Sets the abstract schema name to the given value and the identification variable that will |
| * range over it. |
| * |
| * @param entity The {@link IEntity} that this clause will range over |
| * @param identificationVariable The new identification variable |
| */ |
| public void setDeclaration(IEntity entity, String identificationVariable) { |
| getModifyClause().setDeclaration(entity, identificationVariable); |
| } |
| |
| /** |
| * Sets the abstract schema name to the given value and removes the identification variable. |
| * |
| * @param abstractSchemaName The name of the abstract schema, which is the name of the entity |
| */ |
| public void setDeclaration(String abstractSchemaName) { |
| getModifyClause().setDeclaration(abstractSchemaName); |
| } |
| |
| /** |
| * Sets the abstract schema name to the given value and the identification variable that will |
| * range over it. |
| * |
| * @param abstractSchemaName The name of the abstract schema, which is the name of the entity |
| * @param identificationVariable The new identification variable |
| */ |
| public void setDeclaration(String abstractSchemaName, String identificationVariable) { |
| getModifyClause().setDeclaration(abstractSchemaName, identificationVariable); |
| } |
| |
| /** |
| * Sets the actual {@link IEntity} and updates the abstract schema name. |
| * |
| * @param entity The {@link IEntity} that this clause will range over |
| */ |
| public void setEntity(IEntity entity) { |
| getModifyClause().setEntity(entity); |
| } |
| |
| /** |
| * Sets the name of the abstract schema, which is the name of the entity. |
| * |
| * @param entityName The name of the entity |
| */ |
| public void setEntityName(String entityName) { |
| getModifyClause().setEntityName(entityName); |
| } |
| |
| /** |
| * Sets the new identification variable that will range over the abstract schema name. |
| * |
| * @param identificationVariable The new identification variable |
| */ |
| public void setIdentificationVariable(String identificationVariable) { |
| getModifyClause().setIdentificationVariable(identificationVariable); |
| } |
| |
| private void setWhereClause(WhereClauseStateObject whereClause) { |
| WhereClauseStateObject oldWhereClause = this.whereClause; |
| this.whereClause = whereClause; |
| firePropertyChanged(WHERE_CLAUSE_PROPERTY, oldWhereClause, whereClause); |
| } |
| |
| /** |
| * Either adds or removes the state object representing the <code><b>WHERE</b></code> clause. |
| */ |
| public void toggleWhereClause() { |
| if (hasWhereClause()) { |
| removeWhereClause(); |
| } |
| else { |
| addWhereClause(); |
| } |
| } |
| |
| @Override |
| protected void toTextInternal(Appendable writer) throws IOException { |
| modifyClause.toString(writer); |
| if (whereClause != null) { |
| writer.append(SPACE); |
| whereClause.toString(writer); |
| } |
| } |
| } |