| /* |
| * Copyright (c) 2012, 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.ArrayList; |
| import java.util.Collection; |
| import java.util.List; |
| import org.eclipse.persistence.jpa.jpql.ExpressionTools; |
| import org.eclipse.persistence.jpa.jpql.parser.FunctionExpression; |
| import org.eclipse.persistence.jpa.jpql.tools.model.IListChangeListener; |
| import org.eclipse.persistence.jpa.jpql.utility.iterable.ListIterable; |
| import org.eclipse.persistence.jpa.jpql.utility.iterable.SnapshotCloneListIterable; |
| import static org.eclipse.persistence.jpa.jpql.parser.AbstractExpression.*; |
| |
| /** |
| * @version 2.4 |
| * @since 2.4 |
| * @author Pascal Filion |
| */ |
| @SuppressWarnings("nls") |
| public class FunctionExpressionStateObject extends AbstractStateObject |
| implements ListHolderStateObject<StateObject> { |
| |
| /** |
| * The name of the native database function. |
| */ |
| private String functionName; |
| |
| /** |
| * The JPQL identifier of the SQL expression. |
| */ |
| private String identifier; |
| |
| /** |
| * The list of {@link StateObject} representing the arguments to pass to the native database function. |
| */ |
| private List<StateObject> items; |
| |
| /** |
| * Notifies the list of arguments has changed. |
| */ |
| public static final String ARGUMENTS_LIST = "arguments"; |
| |
| /** |
| * Notifies the function name property has changed. |
| */ |
| public static final String FUNCTION_NAME_PROPERTY = "functionName"; |
| |
| /** |
| * Creates a new <code>AbstractFunctionExpressionStateObject</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> |
| */ |
| public FunctionExpressionStateObject(StateObject parent) { |
| super(parent); |
| } |
| |
| /** |
| * Creates a new <code>AbstractFunctionExpressionStateObject</code>. |
| * |
| * @param parent The parent of this state object, which cannot be <code>null</code> |
| * @param identifier The JPQL identifier of the SQL expression |
| * @param functionName The name of the native database function |
| * @param arguments The list of {@link StateObject} representing the arguments to pass to the |
| * native database function |
| * @exception NullPointerException The given parent cannot be <code>null</code> |
| */ |
| public FunctionExpressionStateObject(StateObject parent, |
| String identifier, |
| String functionName, |
| List<? extends StateObject> arguments) { |
| |
| super(parent); |
| this.identifier = identifier; |
| this.functionName = ExpressionTools.unquote(functionName); |
| this.items.addAll(parent(arguments)); |
| } |
| |
| @Override |
| public void accept(StateObjectVisitor visitor) { |
| acceptUnknownVisitor(visitor); |
| } |
| |
| @Override |
| protected void addChildren(List<StateObject> children) { |
| super.addChildren(children); |
| children.addAll(items); |
| } |
| |
| @Override |
| public <S extends StateObject> S addItem(S item) { |
| getChangeSupport().addItem(this, items, ARGUMENTS_LIST, parent(item)); |
| return item; |
| } |
| |
| @Override |
| public void addItems(List<? extends StateObject> items) { |
| getChangeSupport().addItems(this, this.items, ARGUMENTS_LIST, parent(items)); |
| } |
| |
| @Override |
| public void addListChangeListener(String listName, IListChangeListener<StateObject> listener) { |
| getChangeSupport().addListChangeListener(listName, listener); |
| } |
| |
| /** |
| * Determines whether the children of this {@link StateObject} are equivalent to the children |
| * of the given one, i.e. the information of the {@link StateObject StateObjects} is the same. |
| * |
| * @param stateObject The {@link StateObject} to compare its children to this one's children |
| * @return <code>true</code> if both have equivalent children; <code>false</code> otherwise |
| */ |
| protected boolean areChildrenEquivalent(FunctionExpressionStateObject stateObject) { |
| |
| int size = itemsSize(); |
| |
| if (size != stateObject.itemsSize()) { |
| return false; |
| } |
| |
| for (int index = size; --index >= 0; ) { |
| |
| StateObject child1 = getItem(index); |
| StateObject child2 = stateObject.getItem(index); |
| |
| if (!child1.isEquivalent(child2)) { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| @Override |
| public boolean canMoveDown(StateObject item) { |
| return getChangeSupport().canMoveDown(items, item); |
| } |
| |
| @Override |
| public boolean canMoveUp(StateObject item) { |
| return getChangeSupport().canMoveUp(items, item); |
| } |
| |
| @Override |
| public FunctionExpression getExpression() { |
| return (FunctionExpression) super.getExpression(); |
| } |
| |
| /** |
| * Returns the name of the native database function. |
| * |
| * @return The new name of the native database function |
| */ |
| public String getFunctionName() { |
| return functionName; |
| } |
| |
| /** |
| * Returns the JPQL identifier of this expression. |
| * |
| * @return The JPQL identifier |
| */ |
| public String getIdentifier() { |
| return identifier; |
| } |
| |
| @Override |
| public StateObject getItem(int index) { |
| return items.get(index); |
| } |
| |
| /** |
| * Returns the quoted name of the native database function. |
| * |
| * @return The new name of the native database function, which is quoted |
| */ |
| public String getQuotedFunctionName() { |
| return ExpressionTools.quote(functionName); |
| } |
| |
| /** |
| * Determines whether the name of the native SQL function has been specified. |
| * |
| * @return <code>true</code> if the function name has been specified; <code>false</code> |
| * otherwise |
| */ |
| public boolean hasFunctionName() { |
| return functionName != null; |
| } |
| |
| @Override |
| public boolean hasItems() { |
| return !items.isEmpty(); |
| } |
| |
| @Override |
| protected void initialize() { |
| super.initialize(); |
| items = new ArrayList<StateObject>(); |
| } |
| |
| @Override |
| public boolean isEquivalent(StateObject stateObject) { |
| |
| if (super.isEquivalent(stateObject)) { |
| FunctionExpressionStateObject function = (FunctionExpressionStateObject) stateObject; |
| return ExpressionTools.valuesAreEqual(functionName, function.functionName) && |
| areChildrenEquivalent(function); |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public ListIterable<StateObject> items() { |
| return new SnapshotCloneListIterable<StateObject>(items); |
| } |
| |
| @Override |
| public int itemsSize() { |
| return items.size(); |
| } |
| |
| @Override |
| public StateObject moveDown(StateObject item) { |
| getChangeSupport().moveDown(this, items, ARGUMENTS_LIST, item); |
| return item; |
| } |
| |
| @Override |
| public StateObject moveUp(StateObject item) { |
| getChangeSupport().moveUp(this, items, ARGUMENTS_LIST, item); |
| return item; |
| } |
| |
| @Override |
| public void removeItem(StateObject item) { |
| getChangeSupport().removeItem(this, items, ARGUMENTS_LIST, item); |
| } |
| |
| @Override |
| public void removeItems(Collection<StateObject> items) { |
| getChangeSupport().removeItems(this, this.items, ARGUMENTS_LIST, items); |
| } |
| |
| @Override |
| public void removeListChangeListener(String listName, IListChangeListener<StateObject> listener) { |
| getChangeSupport().removeListChangeListener(listName, listener); |
| } |
| |
| /** |
| * Keeps a reference of the {@link FunctionExpression parsed object} object, which should only be |
| * done when this object is instantiated during the conversion of a parsed JPQL query into |
| * {@link StateObject StateObjects}. |
| * |
| * @param expression The {@link FunctionExpression parsed object} representing a SQL expression |
| */ |
| public void setExpression(FunctionExpression expression) { |
| super.setExpression(expression); |
| } |
| |
| /** |
| * Sets the unquoted name of the native database function. |
| * |
| * @param functionName The new name of the native database function, which should be unquoted |
| */ |
| public void setFunctionName(String functionName) { |
| String oldFunctionName = this.functionName; |
| this.functionName = functionName; |
| firePropertyChanged(FUNCTION_NAME_PROPERTY, oldFunctionName, functionName); |
| } |
| |
| @Override |
| protected void toTextInternal(Appendable writer) throws IOException { |
| |
| // Function name |
| if (functionName != null) { |
| writer.append(SINGLE_QUOTE); |
| writer.append(functionName); |
| writer.append(SINGLE_QUOTE); |
| } |
| |
| if (hasItems()) { |
| writer.append(COMMA); |
| writer.append(SPACE); |
| toStringItems(writer, items, true); |
| } |
| } |
| } |