- /*
- * Copyright 1999-2004 The Apache Software Foundation
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package org.apache.commons.jxpath.ri.model.dynabeans;
-
- import java.util.Arrays;
-
- import org.apache.commons.beanutils.DynaBean;
- import org.apache.commons.beanutils.DynaClass;
- import org.apache.commons.beanutils.DynaProperty;
- import org.apache.commons.jxpath.JXPathException;
- import org.apache.commons.jxpath.ri.model.NodePointer;
- import org.apache.commons.jxpath.ri.model.beans.PropertyPointer;
- import org.apache.commons.jxpath.util.TypeUtils;
- import org.apache.commons.jxpath.util.ValueUtils;
-
- /**
- * Pointer pointing to a property of a DynaBean.
- *
- * @author Dmitri Plotnikov
- * @version $Revision: 1.12 $ $Date: 2004/04/04 22:06:35 $
- */
- public class DynaBeanPropertyPointer extends PropertyPointer {
- private DynaBean dynaBean;
- private String name;
- private String[] names;
-
- public DynaBeanPropertyPointer(NodePointer parent, DynaBean dynaBean) {
- super(parent);
- this.dynaBean = dynaBean;
- }
-
- public Object getBaseValue() {
- return dynaBean.get(getPropertyName());
- }
-
- /**
- * This type of node is auxiliary.
- */
- public boolean isContainer() {
- return true;
- }
-
- /**
- * Number of the DP object's properties.
- */
- public int getPropertyCount() {
- return getPropertyNames().length;
- }
-
- /**
- * Names of all properties, sorted alphabetically
- *
- * @todo do something about the sorting
- */
- public String[] getPropertyNames() {
- if (names == null) {
- DynaClass dynaClass = dynaBean.getDynaClass();
- DynaProperty properties[] = dynaClass.getDynaProperties();
- int count = properties.length;
- boolean hasClass = dynaClass.getDynaProperty("class") != null;
- if (hasClass) {
- count--; // Exclude "class" from properties
- }
- names = new String[count];
- for (int i = 0, j = 0; i < properties.length; i++) {
- String name = properties[i].getName();
- if (!hasClass || !name.equals("class")) {
- names[j++] = name;
- }
- }
- Arrays.sort(names);
- }
- return names;
- }
-
- /**
- * Returns the name of the currently selected property or "*"
- * if none has been selected.
- */
- public String getPropertyName() {
- if (name == null) {
- String names[] = getPropertyNames();
- if (propertyIndex >= 0 && propertyIndex < names.length) {
- name = names[propertyIndex];
- }
- else {
- name = "*";
- }
- }
- return name;
- }
-
- /**
- * Select a property by name.
- */
- public void setPropertyName(String propertyName) {
- setPropertyIndex(UNSPECIFIED_PROPERTY);
- this.name = propertyName;
- }
-
- /**
- * Index of the currently selected property in the list of all
- * properties sorted alphabetically.
- */
- public int getPropertyIndex() {
- if (propertyIndex == UNSPECIFIED_PROPERTY) {
- String names[] = getPropertyNames();
- for (int i = 0; i < names.length; i++) {
- if (names[i].equals(name)) {
- propertyIndex = i;
- name = null;
- break;
- }
- }
- }
- return super.getPropertyIndex();
- }
-
- /**
- * Index a property by its index in the list of all
- * properties sorted alphabetically.
- */
- public void setPropertyIndex(int index) {
- if (propertyIndex != index) {
- super.setPropertyIndex(index);
- name = null;
- }
- }
-
- /**
- * If index == WHOLE_COLLECTION, the value of the property, otherwise
- * the value of the index'th element of the collection represented by the
- * property. If the property is not a collection, index should be zero
- * and the value will be the property itself.
- */
- public Object getImmediateNode() {
- String name = getPropertyName();
- if (name.equals("*")) {
- return null;
- }
-
- Object value;
- if (index == WHOLE_COLLECTION) {
- value = ValueUtils.getValue(dynaBean.get(name));
- }
- else if (isIndexedProperty()) {
- // DynaClass at this point is not based on whether
- // the property is indeed indexed, but rather on
- // whether it is an array or List. Therefore
- // the indexed set may fail.
- try {
- value = ValueUtils.getValue(dynaBean.get(name, index));
- }
- catch (ArrayIndexOutOfBoundsException ex) {
- value = null;
- }
- catch (IllegalArgumentException ex) {
- value = dynaBean.get(name);
- value = ValueUtils.getValue(value, index);
- }
- }
- else {
- value = dynaBean.get(name);
- if (ValueUtils.isCollection(value)) {
- value = ValueUtils.getValue(value, index);
- }
- else if (index != 0) {
- value = null;
- }
- }
- return value;
- }
-
- /**
- * Returns true if the bean has the currently selected property
- */
- protected boolean isActualProperty() {
- DynaClass dynaClass = dynaBean.getDynaClass();
- return dynaClass.getDynaProperty(getPropertyName()) != null;
- }
-
- protected boolean isIndexedProperty() {
- DynaClass dynaClass = dynaBean.getDynaClass();
- DynaProperty property = dynaClass.getDynaProperty(name);
- return property.isIndexed();
- }
-
- /**
- * If index == WHOLE_COLLECTION, change the value of the property, otherwise
- * change the value of the index'th element of the collection
- * represented by the property.
- */
- public void setValue(Object value) {
- setValue(index, value);
- }
-
- public void remove() {
- if (index == WHOLE_COLLECTION) {
- dynaBean.set(getPropertyName(), null);
- }
- else if (isIndexedProperty()) {
- dynaBean.set(getPropertyName(), index, null);
- }
- else if (isCollection()) {
- Object collection = ValueUtils.remove(getBaseValue(), index);
- dynaBean.set(getPropertyName(), collection);
- }
- else if (index == 0) {
- dynaBean.set(getPropertyName(), null);
- }
- }
-
- private void setValue(int index, Object value) {
- if (index == WHOLE_COLLECTION) {
- dynaBean.set(getPropertyName(), convert(value, false));
- }
- else if (isIndexedProperty()) {
- dynaBean.set(getPropertyName(), index, convert(value, true));
- }
- else {
- Object baseValue = dynaBean.get(getPropertyName());
- ValueUtils.setValue(baseValue, index, value);
- }
- }
-
-
- private Object convert(Object value, boolean element) {
- DynaClass dynaClass = (DynaClass) dynaBean.getDynaClass();
- DynaProperty property = dynaClass.getDynaProperty(getPropertyName());
- Class type = property.getType();
- if (element) {
- if (type.isArray()) {
- type = type.getComponentType();
- }
- else {
- return value; // No need to convert
- }
- }
-
- try {
- return TypeUtils.convert(value, type);
- }
- catch (Exception ex) {
- throw new JXPathException(
- "Cannot convert value of class "
- + (value == null ? "null" : value.getClass().getName())
- + " to type "
- + type,
- ex);
- }
- }
- }