/*
* $Id: XmpSchema.java 4784 2011-03-15 08:33:00Z blowagie $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2011 1T3XT BVBA
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
* 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
package com.itextpdf.text.xml.xmp;
import java.util.Enumeration;
import java.util.Properties;
/**
* Abstract superclass of the XmpSchemas supported by iText.
*/
public abstract class XmpSchema extends Properties {
private static final long serialVersionUID = -176374295948945272L;
/** the namesspace */
protected String xmlns;
/** Constructs an XMP schema.
* @param xmlns
*/
public XmpSchema(String xmlns) {
super();
this.xmlns = xmlns;
}
/**
* The String representation of the contents.
* @return a String representation.
*/
@Override
public String toString() {
StringBuffer buf = new StringBuffer();
for (Enumeration<?> e = this.propertyNames(); e.hasMoreElements(); ) {
process(buf, e.nextElement());
}
return buf.toString();
}
/**
* Processes a property
* @param buf
* @param p
*/
protected void process(StringBuffer buf, Object p) {
buf.append('<');
buf.append(p);
buf.append('>');
buf.append(this.get(p));
buf.append("</");
buf.append(p);
buf.append('>');
}
/**
* @return Returns the xmlns.
*/
public String getXmlns() {
return xmlns;
}
/**
* @param key
* @param value
* @return the previous property (null if there wasn't one)
*/
public Object addProperty(String key, String value) {
return this.setProperty(key, value);
}
/**
* @see java.util.Properties#setProperty(java.lang.String, java.lang.String)
*/
@Override
public Object setProperty(String key, String value) {
return super.setProperty(key, escape(value));
}
/**
* @see java.util.Properties#setProperty(java.lang.String, java.lang.String)
*
* @param key
* @param value
* @return the previous property (null if there wasn't one)
*/
public Object setProperty(String key, XmpArray value) {
return super.setProperty(key, value.toString());
}
/**
* @see java.util.Properties#setProperty(java.lang.String, java.lang.String)
*
* @param key
* @param value
* @return the previous property (null if there wasn't one)
*/
public Object setProperty(String key, LangAlt value) {
return super.setProperty(key, value.toString());
}
/**
* @param content
* @return an escaped string
*/
public static String escape(String content) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < content.length(); i++) {
switch(content.charAt(i)) {
case '<':
buf.append("<");
break;
case '>':
buf.append(">");
break;
case '\'':
buf.append("'");
break;
case '\"':
buf.append(""");
break;
case '&':
buf.append("&");
break;
default:
buf.append(content.charAt(i));
}
}
return buf.toString();
}
}
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