org.apache.myfaces.shared_tomahawk.renderkit.html.util.SharedStringBuilder Maven / Gradle / Ivy

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JSF components and utilities that can be used with any JSF implementation. This library is based on the JSF1.1 version of Tomahawk, but with minor source code and build changes to take advantage of JSF2.1 features. A JSF2.1 implementation is required to use this version of the Tomahawk library.

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/*
 * 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.myfaces.shared_tomahawk.renderkit.html.util;

import java.util.Map;
import javax.faces.context.FacesContext;

/**
 *
 * @author lu4242
 */
public class SharedStringBuilder
{
    public static StringBuilder get(String stringBuilderKey)
    {
        return get(FacesContext.getCurrentInstance(), stringBuilderKey);
    }

    // TODO checkstyle complains; does this have to lead with __ ?
    public static StringBuilder get(FacesContext facesContext, String stringBuilderKey)
    {
        Map attributes = facesContext.getAttributes();

        StringBuilder sb = (StringBuilder) attributes.get(stringBuilderKey);

        if (sb == null)
        {
            sb = new StringBuilder();
            attributes.put(stringBuilderKey, sb);
        }
        else
        {

            // clear out the stringBuilder by setting the length to 0
            sb.setLength(0);
        }

        return sb;
    }
    
    public static StringBuilder get(FacesContext facesContext, String stringBuilderKey, int initialSize)
    {
        Map attributes = facesContext.getAttributes();

        StringBuilder sb = (StringBuilder) attributes.get(stringBuilderKey);

        if (sb == null)
        {
            sb = new StringBuilder(initialSize);
            attributes.put(stringBuilderKey, sb);
        }
        else
        {

            // clear out the stringBuilder by setting the length to 0
            sb.setLength(0);
        }

        return sb;
    }
}