| /* |
| * Copyright (c) 1998, 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 from Oracle TopLink |
| package org.eclipse.persistence.internal.sessions; |
| |
| import java.io.StringWriter; |
| import java.util.*; |
| import org.eclipse.persistence.internal.helper.*; |
| import org.eclipse.persistence.sessions.DatabaseRecord; |
| |
| /** |
| * PERF: Optimized record implementation using arrays instead of Vector. |
| * Currently only used when fetch rows from the database. |
| */ |
| public class ArrayRecord extends DatabaseRecord { |
| protected DatabaseField[] fieldsArray; |
| protected Object[] valuesArray; |
| |
| protected ArrayRecord() { |
| super(); |
| } |
| |
| public ArrayRecord(Vector fields, DatabaseField[] fieldsArray, Object[] valuesArray) { |
| super(fields, null, fieldsArray.length); |
| this.fieldsArray = fieldsArray; |
| this.valuesArray = valuesArray; |
| } |
| |
| /** |
| * Reset the fields and values from the arrays. |
| * This removes the optimization if a non-optimized method is called. |
| */ |
| protected void checkValues() { |
| if (this.values == null) { |
| this.values = new NonSynchronizedVector(this.valuesArray.length); |
| for (Object value : this.valuesArray) { |
| this.values.add(value); |
| } |
| } |
| } |
| |
| /** |
| * INTERNAL: |
| * Add the field-value pair to the row. Will not check, |
| * will simply add to the end of the row |
| */ |
| @Override |
| public void add(DatabaseField key, Object value) { |
| checkValues(); |
| this.fieldsArray = null; |
| this.valuesArray = null; |
| super.add(key, value); |
| } |
| |
| /** |
| * PUBLIC: |
| * Clear the contents of the row. |
| */ |
| @Override |
| public void clear() { |
| this.fieldsArray = null; |
| this.valuesArray = null; |
| super.clear(); |
| } |
| |
| /** |
| * INTERNAL: |
| * Clone the row and its values. |
| */ |
| @Override |
| public AbstractRecord clone() { |
| checkValues(); |
| return super.clone(); |
| } |
| |
| /** |
| * INTERNAL: |
| * Check if the field is contained in the row. |
| */ |
| @Override |
| public boolean containsKey(DatabaseField key) { |
| if (this.fieldsArray != null) { |
| // Optimize check. |
| int index = key.index; |
| if ((index >= 0) && (index < this.size)) { |
| DatabaseField field = this.fieldsArray[index]; |
| if ((field == key) || field.equals(key)) { |
| return true; |
| } |
| } |
| for (DatabaseField field : this.fieldsArray) { |
| if ((field == key) || field.equals(key)) { |
| return true; |
| } |
| } |
| return false; |
| } else { |
| return super.containsKey(key); |
| } |
| } |
| |
| /** |
| * PUBLIC: |
| * Check if the value is contained in the row. |
| */ |
| @Override |
| public boolean containsValue(Object value) { |
| if (this.valuesArray != null) { |
| for (Object rowValue : this.valuesArray) { |
| if ((value == rowValue) || rowValue.equals(value)) { |
| return true; |
| } |
| } |
| return false; |
| } else { |
| return super.containsValue(value); |
| } |
| } |
| |
| /** |
| * INTERNAL: |
| * Retrieve the value for the field. If missing null is returned. |
| */ |
| @Override |
| public Object get(DatabaseField key) { |
| if (this.fieldsArray != null) { |
| // Optimize check. |
| int index = key.index; |
| if ((index >= 0) && (index < this.size)) { |
| DatabaseField field = this.fieldsArray[index]; |
| if ((field == key) || field.equals(key)) { |
| return this.valuesArray[index]; |
| } |
| } |
| for (int fieldIndex = 0; fieldIndex < this.size; fieldIndex++) { |
| DatabaseField field = this.fieldsArray[fieldIndex]; |
| if ((field == key) || field.equals(key)) { |
| // PERF: If the fields index was not set, then set it. |
| if (index == -1) { |
| key.setIndex(fieldIndex); |
| } |
| return this.valuesArray[fieldIndex]; |
| } |
| } |
| return null; |
| } else { |
| return super.get(key); |
| } |
| } |
| |
| /** |
| * INTERNAL: |
| * Retrieve the value for the field. If missing DatabaseRow.noEntry is returned. |
| */ |
| @Override |
| public Object getIndicatingNoEntry(DatabaseField key) { |
| if (this.fieldsArray != null) { |
| // Optimize check. |
| int index = key.index; |
| if ((index >= 0) && (index < this.size)) { |
| DatabaseField field = this.fieldsArray[index]; |
| if ((field == key) || field.equals(key)) { |
| return this.valuesArray[index]; |
| } |
| } |
| for (int fieldIndex = 0; fieldIndex < this.size; fieldIndex++) { |
| DatabaseField field = this.fieldsArray[fieldIndex]; |
| if ((field == key) || field.equals(key)) { |
| // PERF: If the fields index was not set, then set it. |
| if (index == -1) { |
| key.setIndex(fieldIndex); |
| } |
| return this.valuesArray[fieldIndex]; |
| } |
| } |
| return AbstractRecord.noEntry; |
| } else { |
| return super.get(key); |
| } |
| } |
| |
| /** |
| * INTERNAL: |
| * Returns the row's field with the same name. |
| */ |
| @Override |
| public DatabaseField getField(DatabaseField key) { |
| if (this.fieldsArray != null) { |
| // Optimize check. |
| int index = key.index; |
| if ((index >= 0) && (index < this.size)) { |
| DatabaseField field = this.fieldsArray[index]; |
| if ((field == key) || field.equals(key)) { |
| return field; |
| } |
| } |
| for (int fieldIndex = 0; fieldIndex < this.size; fieldIndex++) { |
| DatabaseField field = this.fieldsArray[fieldIndex]; |
| if ((field == key) || field.equals(key)) { |
| return field; |
| } |
| } |
| return null; |
| } else { |
| return super.getField(key); |
| } |
| } |
| |
| /** |
| * INTERNAL: |
| */ |
| @Override |
| public Vector getFields() { |
| checkValues(); |
| return super.getFields(); |
| } |
| |
| /** |
| * INTERNAL: |
| */ |
| @Override |
| public Vector getValues() { |
| checkValues(); |
| return super.getValues(); |
| } |
| |
| /** |
| * INTERNAL: |
| * Add the field-value pair to the row. |
| */ |
| @Override |
| public Object put(DatabaseField key, Object value) { |
| checkValues(); |
| this.fieldsArray = null; |
| this.valuesArray = null; |
| return super.put(key, value); |
| } |
| |
| /** |
| * INTERNAL: |
| * Remove the field key from the row. |
| */ |
| @Override |
| public Object remove(DatabaseField key) { |
| checkValues(); |
| this.fieldsArray = null; |
| this.valuesArray = null; |
| return super.remove(key); |
| } |
| |
| /** |
| * INTERNAL: |
| * replaces the value at index with value |
| */ |
| @Override |
| public void replaceAt(Object value, int index) { |
| if (this.valuesArray != null) { |
| this.valuesArray[index] = value; |
| } else { |
| super.replaceAt(value, index); |
| } |
| } |
| |
| /** |
| * INTERNAL: |
| * replaces the value at field with value |
| */ |
| @Override |
| public void replaceAt(Object value, DatabaseField key) { |
| if (this.fieldsArray != null) { |
| // Optimize check. |
| int index = key.index; |
| if ((index >= 0) && (index < this.size)) { |
| DatabaseField field = this.fieldsArray[index]; |
| if ((field == key) || field.equals(key)) { |
| this.valuesArray[index] = value; |
| return; |
| } |
| } |
| for (int fieldIndex = 0; fieldIndex < this.size; fieldIndex++) { |
| DatabaseField field = this.fieldsArray[fieldIndex]; |
| if ((field == key) || field.equals(key)) { |
| // PERF: If the fields index was not set, then set it. |
| if (index == -1) { |
| key.setIndex(fieldIndex); |
| } |
| this.valuesArray[fieldIndex] = value; |
| return; |
| } |
| } |
| } else { |
| super.replaceAt(value, key); |
| } |
| } |
| |
| @Override |
| protected void setFields(Vector fields) { |
| checkValues(); |
| this.fieldsArray = null; |
| this.valuesArray = null; |
| super.setFields(fields); |
| } |
| |
| @Override |
| protected void setValues(Vector values) { |
| checkValues(); |
| this.fieldsArray = null; |
| this.valuesArray = null; |
| super.setValues(values); |
| } |
| |
| /** |
| * PUBLIC: |
| * Return the number of field/value pairs in the row. |
| */ |
| @Override |
| public int size() { |
| if (this.fieldsArray == null) { |
| return this.fields.size(); |
| } else { |
| return this.fieldsArray.length; |
| } |
| } |
| |
| @Override |
| public String toString() { |
| if (this.valuesArray != null) { |
| StringWriter writer = new StringWriter(); |
| writer.write(Helper.getShortClassName(getClass())); |
| writer.write("("); |
| writer.write(toStringAditional()); |
| for (int index = 0; index < this.fieldsArray.length; index++) { |
| writer.write(Helper.cr()); |
| writer.write("\t"); |
| writer.write(String.valueOf(this.fieldsArray[index])); |
| writer.write(" => "); |
| writer.write(String.valueOf(this.valuesArray[index])); |
| } |
| if (this.sopObject != null) { |
| writer.write(Helper.cr()); |
| writer.write(" sopObject = "); |
| writer.write(this.sopObject.toString()); |
| } |
| writer.write(")"); |
| |
| return writer.toString(); |
| } else { |
| return super.toString(); |
| } |
| } |
| |
| protected String toStringAditional() { |
| return ""; |
| } |
| } |