com.vaadin.v7.data.util.sqlcontainer.ColumnProperty Maven / Gradle / Ivy
Show all versions of vaadin-compatibility-server Show documentation
/*
* Copyright (C) 2000-2024 Vaadin Ltd
*
* This program is available under Vaadin Commercial License and Service Terms.
*
* See for the full
* license.
*/
package com.vaadin.v7.data.util.sqlcontainer;
import java.sql.Date;
import java.sql.Time;
import java.sql.Timestamp;
import com.vaadin.v7.data.Property;
import com.vaadin.v7.data.util.converter.Converter.ConversionException;
/**
* ColumnProperty represents the value of one column in a RowItem. In addition
* to the value, ColumnProperty also contains some basic column attributes such
* as nullability status, read-only status and data type.
*
* Note that depending on the QueryDelegate in use this does not necessarily map
* into an actual column in a database table.
*
* @deprecated As of 8.0, no replacement available.
*/
@Deprecated
public final class ColumnProperty implements Property {
private static final long serialVersionUID = -3694463129581802457L;
private RowItem owner;
private String propertyId;
private boolean readOnly;
private boolean allowReadOnlyChange = true;
private boolean nullable = true;
private Object value;
private Object changedValue;
private Class type;
private boolean modified;
private boolean versionColumn;
private boolean primaryKey = false;
/**
* Prevent instantiation without required parameters.
*/
@SuppressWarnings("unused")
private ColumnProperty() {
}
/**
* Deprecated constructor for ColumnProperty. If this is used the primary
* keys are not identified correctly in some cases for some databases (i.e.
* Oracle). See http://dev.vaadin.com/ticket/9145.
*
* @param propertyId
* @param readOnly
* @param allowReadOnlyChange
* @param nullable
* @param value
* @param type
*
* @deprecated As of 7.0. Use
* {@link #ColumnProperty(String, boolean, boolean, boolean, boolean, Object, Class)}
* instead
*/
@Deprecated
public ColumnProperty(String propertyId, boolean readOnly,
boolean allowReadOnlyChange, boolean nullable, Object value,
Class type) {
this(propertyId, readOnly, allowReadOnlyChange, nullable, false, value,
type);
}
/**
* Creates a new ColumnProperty instance.
*
* @param propertyId
* The ID of this property.
* @param readOnly
* Whether this property is read-only.
* @param allowReadOnlyChange
* Whether the read-only status of this property can be changed.
* @param nullable
* Whether this property accepts null values.
* @param primaryKey
* Whether this property corresponds to a database primary key.
* @param value
* The value of this property.
* @param type
* The type of this property.
*/
public ColumnProperty(String propertyId, boolean readOnly,
boolean allowReadOnlyChange, boolean nullable, boolean primaryKey,
Object value, Class type) {
if (propertyId == null) {
throw new IllegalArgumentException("Properties must be named.");
}
if (type == null) {
throw new IllegalArgumentException("Property type must be set.");
}
this.propertyId = propertyId;
this.type = type;
this.value = value;
this.allowReadOnlyChange = allowReadOnlyChange;
this.nullable = nullable;
this.readOnly = readOnly;
this.primaryKey = primaryKey;
}
/**
* Returns the current value for this property. To get the previous value
* (if one exists) for a modified property use {@link #getOldValue()}.
*
* @return
*/
@Override
public Object getValue() {
if (isModified()) {
return changedValue;
}
return value;
}
/**
* Returns the original non-modified value of this property if it has been
* modified.
*
* @return The original value if isModified() is true,
* getValue() otherwise.
*/
public Object getOldValue() {
return value;
}
@Override
public void setValue(Object newValue)
throws ReadOnlyException, ConversionException {
if (newValue == null && !nullable) {
throw new NotNullableException(
"Null values are not allowed for this property.");
}
if (readOnly) {
throw new ReadOnlyException(
"Cannot set value for read-only property.");
}
/* Check if this property is a date property. */
boolean isDateProperty = Time.class.equals(getType())
|| Date.class.equals(getType())
|| Timestamp.class.equals(getType());
if (newValue != null) {
/* Handle SQL dates, times and Timestamps given as java.util.Date */
if (isDateProperty) {
/*
* Try to get the millisecond value from the new value of this
* property. Possible type to convert from is java.util.Date.
*/
long millis = 0;
if (newValue instanceof java.util.Date) {
millis = ((java.util.Date) newValue).getTime();
/*
* Create the new object based on the millisecond value,
* according to the type of this property.
*/
if (Time.class.equals(getType())) {
newValue = new Time(millis);
} else if (Date.class.equals(getType())) {
newValue = new Date(millis);
} else if (Timestamp.class.equals(getType())) {
newValue = new Timestamp(millis);
}
}
}
if (!getType().isAssignableFrom(newValue.getClass())) {
throw new IllegalArgumentException(
"Illegal value type for ColumnProperty");
}
/*
* If the value to be set is the same that has already been set, do
* not set it again.
*/
if (isValueAlreadySet(newValue)) {
return;
}
}
/* Set the new value and notify container of the change. */
changedValue = newValue;
modified = true;
owner.getContainer().itemChangeNotification(owner);
}
private boolean isValueAlreadySet(Object newValue) {
Object referenceValue = isModified() ? changedValue : value;
return (isNullable() && newValue == null && referenceValue == null)
|| newValue.equals(referenceValue);
}
@Override
public Class getType() {
return type;
}
@Override
public boolean isReadOnly() {
return readOnly;
}
/**
* Returns whether the read-only status of this property can be changed
* using {@link #setReadOnly(boolean)}.
*
* Used to prevent setting to read/write mode a property that is not allowed
* to be written by the underlying database. Also used for values like
* VERSION and AUTO_INCREMENT fields that might be set to read-only by the
* container but the database still allows writes.
*
* @return true if the read-only status can be changed, false otherwise.
*/
public boolean isReadOnlyChangeAllowed() {
return allowReadOnlyChange;
}
@Override
public void setReadOnly(boolean newStatus) {
if (allowReadOnlyChange) {
readOnly = newStatus;
}
}
public boolean isPrimaryKey() {
return primaryKey;
}
public String getPropertyId() {
return propertyId;
}
// LegacyPropertyHelper has been removed in Vaadin 8
public void setOwner(RowItem owner) {
if (owner == null) {
throw new IllegalArgumentException("Owner can not be set to null.");
}
if (this.owner != null) {
throw new IllegalStateException(
"ColumnProperties can only be bound once.");
}
this.owner = owner;
}
public boolean isModified() {
return modified;
}
public boolean isVersionColumn() {
return versionColumn;
}
public void setVersionColumn(boolean versionColumn) {
this.versionColumn = versionColumn;
}
public boolean isNullable() {
return nullable;
}
/**
* Return whether the value of this property should be persisted to the
* database.
*
* @return true if the value should be written to the database, false
* otherwise.
*/
public boolean isPersistent() {
if (isVersionColumn()) {
return false;
}
return isReadOnlyChangeAllowed() && !isReadOnly();
}
/**
* Returns whether or not this property is used as a row identifier.
*
* @return true if the property is a row identifier, false otherwise.
*/
public boolean isRowIdentifier() {
return isPrimaryKey() || isVersionColumn();
}
/**
* An exception that signals that a null value was passed to
* the setValue method, but the value of this property can not
* be set to null.
*/
@SuppressWarnings("serial")
@Deprecated
public class NotNullableException extends RuntimeException {
/**
* Constructs a new NotNullableException without a detail
* message.
*/
public NotNullableException() {
}
/**
* Constructs a new NotNullableException with the specified
* detail message.
*
* @param msg
* the detail message
*/
public NotNullableException(String msg) {
super(msg);
}
/**
* Constructs a new NotNullableException from another
* exception.
*
* @param cause
* The cause of the failure
*/
public NotNullableException(Throwable cause) {
super(cause);
}
}
public void commit() {
if (isModified()) {
modified = false;
value = changedValue;
}
}
}