org.directwebremoting.extend.NonNestedOutboundVariable Maven / Gradle / Ivy

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DWR is easy Ajax for Java. It makes it simple to call Java code directly from Javascript. It gets rid of almost all the boiler plate code between the web browser and your Java code.

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/*
 * Copyright 2005 Joe Walker
 *
 * 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.directwebremoting.extend;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * An {@link OutboundVariable} that we know to be unable to recurse
 * @author Joe Walker [joe at getahead dot ltd dot uk]
 */
public class NonNestedOutboundVariable implements OutboundVariable
{
    /**
     * Create a new NonNestedOutboundVariable
     */
    public NonNestedOutboundVariable(String assignCode)
    {
        this.assignCode = assignCode;
    }

    /* (non-Javadoc)
     * @see org.directwebremoting.extend.OutboundVariable#incrementReferenceCount()
     */
    public void incrementReferenceCount()
    {
        referenceCount++;

        if (referenceCount > 1)
        {
            log.warn("Creating JsonString from multiply referenced ArrayJsonOutboundVariable. Recurrsion expected.");
        }
    }

    /* (non-Javadoc)
     * @see org.directwebremoting.OutboundVariable#getDeclareCode()
     */
    public String getDeclareCode()
    {
        return "";
    }

    /* (non-Javadoc)
     * @see org.directwebremoting.OutboundVariable#getBuildCode()
     */
    public String getBuildCode()
    {
        return "";
    }

    /* (non-Javadoc)
     * @see org.directwebremoting.OutboundVariable#getAssignCode()
     */
    public String getAssignCode()
    {
        return assignCode;
    }

    /* (non-Javadoc)
     * @see org.directwebremoting.OutboundVariable#getReference()
     */
    public OutboundVariable getReferenceVariable()
    {
        return this;
    }

    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString()
    {
        return "NonNestedOutboundVariable(" + getAssignCode() + ")";
    }

    /**
     * The variable that we refer to
     */
    private final String assignCode;

    /**
     * By how many objects are we referred to?
     */
    private int referenceCount = 0;

    /**
     * The log stream
     */
    private static final Log log = LogFactory.getLog(NonNestedOutboundVariable.class);
}