Initial import.

[clinton/mirror/jspi/.git] / jspi / src / main / java / de / lohndirekt / print / SimpleMultiDoc.java

/**\r
 * Copyright (C) 2003 <a href="http://www.lohndirekt.de/">lohndirekt.de</a>\r
 *\r
 * This library is free software; you can redistribute it and/or\r
 * modify it under the terms of the GNU Lesser General Public\r
 * License as published by the Free Software Foundation; either\r
 * version 2.1 of the License, or (at your option) any later version.\r
 * \r
 * This library is distributed in the hope that it will be useful,\r
 * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU\r
 * Lesser General Public License for more details.\r
 * \r
 * You should have received a copy of the GNU Lesser General Public\r
 * License along with this library; if not, write to the Free Software\r
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA\r
 *  \r
 */\r
package de.lohndirekt.print;\r
\r
import java.io.IOException;\r
import java.util.ArrayList;\r
import java.util.Iterator;\r
import java.util.List;\r
\r
import javax.print.Doc;\r
import javax.print.MultiDoc;\r
\r
/**\r
 * @author bpusch\r
 *\r
 */\r
public class SimpleMultiDoc implements MultiDoc {\r
\r
    private List listeners;\r
    Doc doc = null;\r
    boolean lastDoc = false;\r
    SimpleMultiDoc next = null;\r
\r
    public static SimpleMultiDoc create(Doc doc) {\r
        return new SimpleMultiDoc(doc, false);\r
    }\r
\r
    public static SimpleMultiDoc create(Doc doc, boolean lastDoc) {\r
        return new SimpleMultiDoc(doc, lastDoc);\r
    }\r
\r
    /**\r
     * \r
     */\r
    protected SimpleMultiDoc(Doc doc, boolean lastDoc) {\r
        if (doc == null) {\r
            throw new NullPointerException("Doc must not be null");\r
        }\r
        this.doc = doc;\r
        this.lastDoc = lastDoc;\r
    }\r
\r
    /**\r
     * Adds a new MultiDoc.\r
     * If the next MultiDoc has already been set, it tries to add it there\r
     * \r
     * @param doc\r
     * @param lastDoc\r
     * @throws IllegalStateException if this has already been the last Document\r
     */\r
    public void setNext(Doc doc, boolean lastDoc) {\r
        if (this.lastDoc) {\r
            throw new IllegalStateException("Last Doc already sent");\r
        }\r
        if (doc == null) {\r
            throw new NullPointerException("Doc must not be null");\r
        }\r
        if (next == null) {\r
            this.next = new SimpleMultiDoc(doc, lastDoc);\r
        } else {\r
            this.next.setNext(doc, lastDoc);\r
        }\r
        this.notifyListeners();\r
    }\r
\r
    public void setNext(Doc doc) {\r
        setNext(doc, false);\r
    }\r
\r
    /**\r
     *\r
     */\r
\r
    public Doc getDoc() throws IOException {\r
        return this.doc;\r
    }\r
\r
    /**\r
     *\r
     */\r
    public MultiDoc next() throws IOException {\r
        if (!this.available()) {\r
            throw new IllegalStateException("Next MultiDoc is not yet available");\r
        }\r
        return this.next;\r
    }\r
\r
    public boolean available() {\r
        return (!this.lastDoc && this.next != null);\r
    }\r
\r
    public boolean isLast() {\r
        return lastDoc;\r
    }\r
\r
    public String toString() {\r
        return this.getClass() + " - " + this.doc.toString();\r
    }\r
\r
    public void addMultiDocListener(MultiDocListener listener) {\r
        if (this.listeners == null) {\r
            this.listeners = new ArrayList();\r
        }\r
        this.listeners.add(listener);\r
    }\r
\r
    private void notifyListeners() {\r
        if (this.listeners != null) {\r
            for (Iterator iter = this.listeners.iterator(); iter.hasNext();) {\r
                MultiDocListener listener = (MultiDocListener) iter.next();\r
                try {\r
                    listener.processEvent(new MultiDocEvent(this.next));\r
                } catch (IOException e) {\r
                    //TODO handle exception appropriatly\r
                }\r
            }\r
        }\r
    }\r
}\r