| /* |
| * Copyright (c) 2013, 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: |
| // Gordon Yorke - Initial development |
| // |
| package org.eclipse.persistence.internal.jpa.querydef; |
| |
| import jakarta.persistence.criteria.ParameterExpression; |
| import jakarta.persistence.metamodel.Metamodel; |
| |
| import org.eclipse.persistence.expressions.ExpressionBuilder; |
| import org.eclipse.persistence.internal.helper.ClassConstants; |
| |
| public class ParameterExpressionImpl<T> extends ExpressionImpl<T> implements ParameterExpression<T> { |
| |
| protected String name; |
| protected String internalName; |
| protected Integer position; |
| |
| public ParameterExpressionImpl(Metamodel metamodel, Class<T> javaType, String name){ |
| super(metamodel, javaType, new ExpressionBuilder().getParameter(name, javaType)); |
| this.name = name; |
| this.internalName = name; |
| } |
| |
| public ParameterExpressionImpl(Metamodel metamodel, Class<T> javaType){ |
| super(metamodel, javaType, null); |
| this.internalName = String.valueOf(System.identityHashCode(this)); |
| this.currentNode = new ExpressionBuilder().getParameter(this.internalName, javaType); |
| } |
| |
| public ParameterExpressionImpl(Metamodel metamodel, Class<T> javaType, Integer position){ |
| super(metamodel, javaType, new ExpressionBuilder().getParameter(position.toString(), javaType)); |
| this.position = position; |
| } |
| |
| @Override |
| public void findRootAndParameters(CommonAbstractCriteriaImpl query){ |
| query.addParameter(this); |
| } |
| |
| /** |
| * Return the parameter name, or null if the parameter is not a named |
| * parameter. |
| * |
| * @return parameter name |
| */ |
| @Override |
| public String getName(){ |
| return this.name; |
| } |
| |
| /** |
| * Returns the name used by EclipseLink when a name has not been assigned by the user. |
| */ |
| public String getInternalName(){ |
| return this.internalName; |
| } |
| |
| /** |
| * Return the parameter position, or null if the parameter is not a |
| * positional parameter. |
| * |
| * @return position of parameter |
| */ |
| @Override |
| public Integer getPosition(){ |
| return this.position; |
| } |
| |
| /** |
| * Return the Java type of the parameter. Values bound to the |
| * parameter must be assignable to this type. |
| * This method is required to be supported for criteria queries |
| * only. Applications that use this method for Java Persistence |
| * query language queries and native queries will not be portable. |
| * @return the Java type of the parameter |
| * @throws IllegalStateException if invoked on a parameter |
| * obtained from a Java persistence query language query or |
| * native query when the implementation does not support this |
| * use. |
| */ |
| @Override |
| public Class<T> getParameterType(){ |
| return this.javaType; |
| } |
| |
| @Override |
| public int hashCode() { |
| if (position != null){ |
| return position.hashCode(); |
| } |
| if (this.internalName == null) this.internalName = ""; |
| return this.internalName.hashCode(); |
| } |
| |
| @Override |
| public boolean isParameter(){ |
| return true; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#equals(java.lang.Object) |
| */ |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null) |
| return false; |
| if (ClassConstants.STRING == obj.getClass()) { |
| return (this.internalName.equals(obj)); |
| } |
| if (getClass() != obj.getClass()) |
| return false; |
| ParameterExpressionImpl other = (ParameterExpressionImpl) obj; |
| if (internalName == null) { |
| if (other.internalName != null){ |
| return false; |
| } else if (position == null){ |
| if (other.position != null){ |
| return false; |
| } |
| } else if (!position.equals(other.position)){ |
| return false; |
| } |
| } else if (!internalName.equals(other.internalName)){ |
| return false; |
| } |
| return true; |
| } |
| |
| /* (non-Javadoc) |
| * @see java.lang.Object#toString() |
| */ |
| @Override |
| public String toString() { |
| if (position == null){ |
| return "Parameter[name=" + name + "]"; |
| }else{ |
| return "Parameter[position=" + position + "]"; |
| } |
| } |
| |
| |
| } |