/*
 * 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.
 */

/* $Id$ */

package org.apache.fop.render.ps.extensions;

import org.xml.sax.Attributes;
import org.xml.sax.Locator;

import org.apache.fop.apps.FOPException;
import org.apache.fop.fo.Constants;
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.extensions.ExtensionAttachment;

/**
 * Extension element for ps:ps-setpagedevice.
 */
public class PSSetPageDeviceElement extends AbstractPSExtensionElement {

    /** The element name */
    protected static final String ELEMENT = "ps-setpagedevice";

    /**
     * Main constructor
     * @param parent parent FO node
     */
    protected PSSetPageDeviceElement(FONode parent) {
        super(parent);
    }

    /**
     * Called after processNode() is called. Subclasses can do additional processing.
     * @throws FOPException if there's a problem during processing
     * @see org.apache.fop.fo.FONode#startOfNode()
     */
    public void startOfNode() throws FOPException {
        super.startOfNode();
        if (!((parent.getNameId() == Constants.FO_DECLARATIONS)
                || (parent.getNameId() == Constants.FO_SIMPLE_PAGE_MASTER))) {
            invalidChildError(getLocator(), parent.getName(), getNamespaceURI(), getName(),
                    "rule.childOfSPMorDeclarations");
        }
    }

    /**
     * Initialize the node with its name, location information, and attributes
     * The attributes must be used immediately as the sax attributes
     * will be altered for the next element.
     * @param elementName element name (e.g., "fo:block")
     * @param locator Locator object (ignored by default)
     * @param attlist Collection of attributes passed to us from the parser.
     * @param propertyList property list
     * @throws FOPException if there's a problem during processing
     * @see org.apache.fop.fo.FONode#processNode
     */
    public void processNode(String elementName, Locator locator,
                            Attributes attlist, PropertyList propertyList)
                                throws FOPException {
        String name = attlist.getValue("name");
        if (name != null && name.length() > 0) {
            ((PSSetPageDevice)getExtensionAttachment()).setName(name);
        }
    }

    /**
     * @return local name
     * @see org.apache.fop.fo.FONode#getLocalName() */
    public String getLocalName() {
        return ELEMENT;
    }

    /**
     * @return a new PSSetPageDevice object
     * @see org.apache.fop.render.ps.extensions.AbstractPSExtensionElement
     * #instantiateExtensionAttachment()
     */
    protected ExtensionAttachment instantiateExtensionAttachment() {
        return new PSSetPageDevice();
    }
}