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Commons JXPath example source code file (BeanPointer.java)

This example Commons JXPath source code file (BeanPointer.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons JXPath tags/keywords

beanpointer, beanpointer, beanpropertypointer, boolean, jxpathbeaninfo, jxpathbeaninfo, number, object, object, propertyownerpointer, qname, string, string, util, whole_collection

The Commons JXPath BeanPointer.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 {@link BeanPropertyPointer} between two BeanPointers
 * in the chain.
 *
 * @author Dmitri Plotnikov
 * @version $Revision: 670727 $ $Date: 2008-06-23 15:10:38 -0500 (Mon, 23 Jun 2008) $
 */
public class BeanPointer extends PropertyOwnerPointer {
    private QName name;
    private Object bean;
    private JXPathBeanInfo beanInfo;

    private static final long serialVersionUID = -8227317938284982440L;

    /**
     * Create a new BeanPointer.
     * @param name is the name given to the first node
     * @param bean pointed
     * @param beanInfo JXPathBeanInfo
     * @param locale Locale
     */
    public BeanPointer(QName name, Object bean, JXPathBeanInfo beanInfo,
            Locale locale) {
        super(null, locale);
        this.name = name;
        this.bean = bean;
        this.beanInfo = beanInfo;
    }

    /**
     * Create a new BeanPointer.
     * @param parent pointer
     * @param name is the name given to the first node
     * @param bean pointed
     * @param beanInfo JXPathBeanInfo
     */
    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;
    }

    public Object getBaseValue() {
        return bean;
    }

    /**
     * {@inheritDoc}
     * @return false
     */
    public boolean isCollection() {
        return false;
    }

    /**
     * {@inheritDoc}
     * @return 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 && (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;
    }

    /**
     * {@inheritDoc}
     * 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();
        }
        if (bean == null) {
            return "null()";
        }
        if (bean instanceof Number) {
            String string = bean.toString();
            if (string.endsWith(".0")) {
                string = string.substring(0, string.length() - 2);
            }
            return string;
        }
        if (bean instanceof Boolean) {
            return ((Boolean) bean).booleanValue() ? "true()" : "false()";
        }
        if (bean instanceof String) {
            return "'" + bean + "'";
        }
        return "/";
    }
}

Other Commons JXPath examples (source code examples)

Here is a short list of links related to this Commons JXPath BeanPointer.java source code file:

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