optionsbuilder.java

这是AJAX的一个HTML实现！ HTML标签AJAX的实现！

/**
 * Copyright 2005 Darren L. Spurgeon
 * Copyright 2007-2008 Jens Kapitza
 *
 * 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 net.sourceforge.ajaxtags.tags;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

/**
 * Helper class to assist in building options passed to JavaScript method.
 * 
 * @author Darren Spurgeon
 * @author Jens Kapitza
 * @version $Revision$ $Date: 2007/06/20 20:55:56 $ $Author: jenskapitza $
 */
class OptionsBuilder {

    private OptionsBuilder() {
    }

    public static OptionsBuilder getOptionsBuilder() {
	return new OptionsBuilder();
    }

    private Map<String, String> parameters = new HashMap<String, String>();

    private Map<String, Boolean> parameterQuotes = new HashMap<String, Boolean>();

    public OptionsBuilder add(String parameter, String value, boolean quoted) {
	if (value != null && !this.parameters.containsKey(parameter)) {
	    this.parameters.put(parameter, value);
	    this.parameterQuotes.put(parameter, Boolean.valueOf(quoted));
	}
	return this;
    }

    public OptionsBuilder add(String parameter, String value, boolean quoted,
	    boolean forceWrite) {
	if (this.parameters.containsKey(parameter)) {
	    this.parameters.remove(parameter);
	    this.parameterQuotes.remove(parameter);
	}

	return add(parameter, value, quoted);
    }

    public OptionsBuilder remove(String parameter) {
	this.parameters.remove(parameter);
	this.parameterQuotes.remove(parameter);
	return this;
    }

    @Override
    public String toString() {
	StringBuffer sb = new StringBuffer();
	for (Iterator<String> iter = this.parameters.keySet().iterator(); iter
		.hasNext();) {
	    String key = iter.next();
	    String value = this.parameters.get(key);
	    boolean quoted = this.parameterQuotes.get(key).booleanValue();
	    sb.append(key).append(": ");
	    if (quoted) {
		sb.append("\"").append(value).append("\"");
	    } else {
		sb.append(value);
	    }
	    if (iter.hasNext()) {
		sb.append(",");
	    }
	    sb.append("\n");
	}
	return sb.toString();
    }

}