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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.
package com.feilong.lib.digester3;
/*
* 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.
*/
import static java.lang.String.format;
import org.xml.sax.Attributes;
/**
*
* Rule implementation that saves a parameter for use by a surrounding CallMethodRule.
*
*
* This parameter may be:
*
* - an arbitrary Object defined programatically, assigned when the element pattern associated with the Rule is
* matched. See {@link #ObjectParamRule(int paramIndex, Object param)}.
*
- an arbitrary Object defined programatically, assigned if the element pattern AND specified attribute name are
* matched. See {@link #ObjectParamRule(int paramIndex, String attributeName, Object param)}.
*
*
*
* @since 1.4
*/
public class ObjectParamRule extends Rule{
// ----------------------------------------------------------- Constructors
/**
* Construct a "call parameter" rule that will save the given Object as the parameter value.
*
* @param paramIndex
* The zero-relative parameter number
* @param param
* the parameter to pass along
*/
public ObjectParamRule(int paramIndex, Object param){
this(paramIndex, null, param);
}
/**
* Construct a "call parameter" rule that will save the given Object as the parameter value, provided that the
* specified attribute exists.
*
* @param paramIndex
* The zero-relative parameter number
* @param attributeName
* The name of the attribute to match
* @param param
* the parameter to pass along
*/
public ObjectParamRule(int paramIndex, String attributeName, Object param){
this.paramIndex = paramIndex;
this.attributeName = attributeName;
this.param = param;
}
// ----------------------------------------------------- Instance Variables
/**
* The attribute which we are attempting to match
*/
protected String attributeName = null;
/**
* The zero-relative index of the parameter we are saving.
*/
protected int paramIndex = 0;
/**
* The parameter we wish to pass to the method call
*/
protected Object param = null;
// --------------------------------------------------------- Public Methods
/**
* {@inheritDoc}
*/
@Override
public void begin(String namespace,String name,Attributes attributes) throws Exception{
Object anAttribute = null;
Object parameters[] = getDigester().peekParams();
if (attributeName != null){
anAttribute = attributes.getValue(attributeName);
if (anAttribute != null){
parameters[paramIndex] = param;
}
// note -- if attributeName != null and anAttribute == null, this rule
// will pass null as its parameter!
}else{
parameters[paramIndex] = param;
}
}
/**
* {@inheritDoc}
*/
@Override
public String toString(){
return format("ObjectParamRule[paramIndex=%s, attributeName=%s, param=%s]", paramIndex, attributeName, param);
}
}