de.intarsys.pdf.app.acroform.EntityFormHandler Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jpod Show documentation

This is a fork of http://sourceforge.net/projects/jpodlib/ as development seems to be frozen. We're providing some bug fixes along with deployments to maven.

There is a newer version: 2.0

Show newest version

/*
 * Copyright (c) 2007, intarsys consulting GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * - Neither the name of intarsys nor the names of its contributors may be used
 *   to endorse or promote products derived from this software without specific
 *   prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package de.intarsys.pdf.app.acroform;

import de.intarsys.tools.stream.StreamTools;
import de.intarsys.tools.xml.EntityDecoder;

import java.io.IOException;
import java.io.StringReader;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * A proxy implementation of an {@link IFormHandler}. This one resolves
 * entities contained within field values before passing them to the delegate
 * instance. This is useful e.g. when dealing with HTTP request parameters.
 */
public class EntityFormHandler extends ProxyFormHandler {

    private static final Logger Log = PACKAGE.Log;

    public EntityFormHandler(IFormHandler delegate) {
        super(delegate);
    }

    protected String resolve(String value) {
        EntityDecoder decoder = new EntityDecoder(new StringReader(value), false);
        try {
            return StreamTools.toString(decoder);
        } catch (IOException e) {
            Log.log(Level.SEVERE, e.getMessage(), e);
            return value;
        } finally {
            StreamTools.close(decoder);
        }
    }

    @Override
    public void setFieldValue(Object fieldRef, Object value) {
        if (value instanceof String) {
            value = resolve((String) value);
        }
        super.setFieldValue(fieldRef, value);
    }
}