- /*
- * 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.beans;
-
- import java.util.Locale;
-
- import org.apache.commons.jxpath.JXPathBeanInfo;
- import org.apache.commons.jxpath.JXPathIntrospector;
- import org.apache.commons.jxpath.ri.QName;
- import org.apache.commons.jxpath.ri.model.NodePointer;
-
- /**
- * A Pointer that points to a JavaBean or a collection. It is either
- * the first element of a path or a pointer for a property value.
- * Typically there is a BeanPropertyPointer between two BeanPointers
- * in the chain.
- *
- * @author Dmitri Plotnikov
- * @version $Revision: 1.13 $ $Date: 2004/02/29 14:17:41 $
- */
- public class BeanPointer extends PropertyOwnerPointer {
- private QName name;
- private Object bean;
- private JXPathBeanInfo beanInfo;
-
- public BeanPointer(
- QName name,
- Object bean,
- JXPathBeanInfo beanInfo,
- Locale locale)
- {
- super(null, locale);
- this.name = name;
- this.bean = bean;
- this.beanInfo = beanInfo;
- }
-
- /**
- * @param name is the name given to the first node
- */
- public BeanPointer(
- NodePointer parent,
- QName name,
- Object bean,
- JXPathBeanInfo beanInfo)
- {
- super(parent);
- this.name = name;
- this.bean = bean;
- this.beanInfo = beanInfo;
- }
-
- public PropertyPointer getPropertyPointer() {
- return new BeanPropertyPointer(this, beanInfo);
- }
-
- public QName getName() {
- return name;
- }
-
- /**
- * Returns the bean itself
- */
- public Object getBaseValue() {
- return bean;
- }
-
- /**
- * Returns false
- */
- public boolean isCollection() {
- return false;
- }
-
- /**
- * Returns 1.
- */
- public int getLength() {
- return 1;
- }
-
- public boolean isLeaf() {
- Object value = getNode();
- return value == null
- || JXPathIntrospector.getBeanInfo(value.getClass()).isAtomic();
- }
-
- public int hashCode() {
- return name == null ? 0 : name.hashCode();
- }
-
- public boolean equals(Object object) {
- if (object == this) {
- return true;
- }
-
- if (!(object instanceof BeanPointer)) {
- return false;
- }
-
- BeanPointer other = (BeanPointer) object;
- if (parent != other.parent) {
- if (parent == null || !parent.equals(other.parent)) {
- return false;
- }
- }
-
- if ((name == null && other.name != null)
- || (name != null && !name.equals(other.name))) {
- return false;
- }
-
- int iThis = (index == WHOLE_COLLECTION ? 0 : index);
- int iOther = (other.index == WHOLE_COLLECTION ? 0 : other.index);
- if (iThis != iOther) {
- return false;
- }
-
- if (bean instanceof Number
- || bean instanceof String
- || bean instanceof Boolean) {
- return bean.equals(other.bean);
- }
- return bean == other.bean;
- }
-
- /**
- * If the pointer has a parent, then parent's path.
- * If the bean is null, "null()".
- * If the bean is a primitive value, the value itself.
- * Otherwise - an empty string.
- */
- public String asPath() {
- if (parent != null) {
- return super.asPath();
- }
- else if (bean == null) {
- return "null()";
- }
- else if (bean instanceof Number) {
- String string = bean.toString();
- if (string.endsWith(".0")) {
- string = string.substring(0, string.length() - 2);
- }
- return string;
- }
- else if (bean instanceof Boolean) {
- return ((Boolean) bean).booleanValue() ? "true()" : "false()";
- }
- else if (bean instanceof String) {
- return "'" + bean + "'";
- }
- return "/";
- }
- }