org.latticesoft.util.container.tree.noderule.RangeRule.java Source code

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Here is the source code for org.latticesoft.util.container.tree.noderule.RangeRule.java

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/*
 * Copyright 2004 Senunkan Shinryuu
 *
 * 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.latticesoft.util.container.tree.noderule;

import java.util.*;
import org.latticesoft.util.common.*;
import org.latticesoft.util.container.tree.Node;
import org.latticesoft.util.container.tree.SingleAttributeNodeRule;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * The range rule is a rule which will a data object to a node based on 
 * if the certain attribute of the data object is within certain range.
 * The range key will be searched to see if the object's attribute fall
 * into the range specified by the key. If it does it will format the key
 * by appending the value represented by the search key.
 * 
 * After which the key checked against the reference to see which node 
 * to refers to. If no match is found the default node will be used
 */
public class RangeRule implements SingleAttributeNodeRule {

    private static final Log log = LogFactory.getLog(EqualRule.class);
    private Node parentNode = null;
    private List keyList = new ArrayList();
    private Map reference = new HashMap();
    private String attributeName = null;

    /** @return Returns the attributeName. */
    public String getAttributeName() {
        return (this.attributeName);
    }

    /** @param attributeName The attributeName to set. */
    public void setAttributeName(String attributeName) {
        this.attributeName = attributeName;
    }

    public Node findNode(Object data) {
        Node theNode = null;
        String nodeName = null;
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < keyList.size(); i++) {
            RangeRuleKey key = (RangeRuleKey) this.keyList.get(i);
            Object dataAttribute = BeanUtil.getAttribute(data, this.attributeName);
            Object value = key.evaluate(dataAttribute);
            if (value != null) {
                sb.append(value);
                sb.append("|");
            }
        }
        if (sb.length() > 0) {
            sb.deleteCharAt(sb.length() - 1);
        }
        if (sb.length() == 0) {
            sb.append("default");
        }
        nodeName = (String) this.reference.get(sb.toString());
        if (log.isInfoEnabled()) {
            log.info(sb.toString() + " --> " + nodeName);
        }
        theNode = this.parentNode.getChild(nodeName);
        return theNode;
    }

    /* (non-Javadoc)
     * @see org.latticesoft.util.container.tree.NodeRule#isDynamic()
     */
    public boolean isDynamic() {
        // TODO Auto-generated method stub
        return false;
    }

    /* (non-Javadoc)
     * @see org.latticesoft.util.container.tree.NodeRule#isStatic()
     */
    public boolean isStatic() {
        // TODO Auto-generated method stub
        return false;
    }

}