Element that contains
* some meta information about the document.
*
* An object of type Meta can not be constructed by the user.
* Userdefined meta information should be placed in a Header-object.
* Meta is reserved for: Subject, Keywords, Author, Title, Producer
* and Creationdate information.
*
* @see Element
* @see Header
*/
public class Meta implements Element, MarkupAttributes {
// membervariables
/** This is the type of Meta-information this object contains. */
private int type;
/** This is the content of the Meta-information. */
private StringBuffer content;
/** Contains extra markupAttributes */
protected Properties markupAttributes;
// constructors
/**
* Constructs a Meta.
*
* @param type the type of meta-information
* @param content the content
*/
Meta(int type, String content) {
this.type = type;
this.content = new StringBuffer(content);
}
/**
* Constructs a Meta.
*
* @param tag the tagname of the meta-information
* @param content the content
*/
public Meta(String tag, String content) {
this.type = Meta.getType(tag);
this.content = new StringBuffer(content);
}
// implementation of the Element-methods
/**
* Processes the element by adding it (or the different parts) to a
* ElementListener.
*
* @param listener the ElementListener
* @return true if the element was processed successfully
*/
public boolean process(ElementListener listener) {
try {
return listener.add(this);
}
catch(DocumentException de) {
return false;
}
}
/**
* Gets the type of the text element.
*
* @return a type
*/
public int type() {
return type;
}
/**
* Gets all the chunks in this element.
*
* @return an ArrayList
*/
public ArrayList getChunks() {
return new ArrayList();
}
// methods
/**
* appends some text to this Meta.
*
* @param string a String
* @return a StringBuffer
*/
public StringBuffer append(String string) {
return content.append(string);
}
// methods to retrieve information
/**
* Returns the content of the meta information.
*
* @return a String
*/
public String content() {
return content.toString();
}
/**
* Returns the name of the meta information.
*
* @return a String
*/
public String name() {
switch (type) {
case Element.SUBJECT:
return ElementTags.SUBJECT;
case Element.KEYWORDS:
return ElementTags.KEYWORDS;
case Element.AUTHOR:
return ElementTags.AUTHOR;
case Element.TITLE:
return ElementTags.TITLE;
case Element.PRODUCER:
return ElementTags.PRODUCER;
case Element.CREATIONDATE:
return ElementTags.CREATIONDATE;
default:
return ElementTags.UNKNOWN;
}
}
/**
* Returns the name of the meta information.
*
* @param tag iText tag for meta information
* @return the Element value corresponding with the given tag
*/
public static int getType(String tag) {
if (ElementTags.SUBJECT.equals(tag)) {
return Element.SUBJECT;
}
if (ElementTags.KEYWORDS.equals(tag)) {
return Element.KEYWORDS;
}
if (ElementTags.AUTHOR.equals(tag)) {
return Element.AUTHOR;
}
if (ElementTags.TITLE.equals(tag)) {
return Element.TITLE;
}
if (ElementTags.PRODUCER.equals(tag)) {
return Element.PRODUCER;
}
if (ElementTags.CREATIONDATE.equals(tag)) {
return Element.CREATIONDATE;
}
return Element.HEADER;
}
/**
* @see com.lowagie.text.MarkupAttributes#setMarkupAttribute(java.lang.String, java.lang.String)
*/
public void setMarkupAttribute(String name, String value) {
if (markupAttributes == null) markupAttributes = new Properties();
markupAttributes.put(name, value);
}
/**
* @see com.lowagie.text.MarkupAttributes#setMarkupAttributes(java.util.Properties)
*/
public void setMarkupAttributes(Properties markupAttributes) {
this.markupAttributes = markupAttributes;
}
/**
* @see com.lowagie.text.MarkupAttributes#getMarkupAttribute(java.lang.String)
*/
public String getMarkupAttribute(String name) {
return (markupAttributes == null) ? null : String.valueOf(markupAttributes.get(name));
}
/**
* @see com.lowagie.text.MarkupAttributes#getMarkupAttributeNames()
*/
public Set getMarkupAttributeNames() {
return Chunk.getKeySet(markupAttributes);
}
/**
* @see com.lowagie.text.MarkupAttributes#getMarkupAttributes()
*/
public Properties getMarkupAttributes() {
return markupAttributes;
}
}