/**
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.groovyscript;
import java.io.IOException;
import java.io.Writer;
import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;
import org.exoplatform.commons.utils.Text;
import groovy.lang.GString;
import groovy.lang.GroovyInterceptable;
import groovy.lang.GroovyObjectSupport;
/**
* @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
* @version $Revision$
*/
abstract class GroovyPrinter extends GroovyObjectSupport implements GroovyInterceptable {
/** An optional locale. */
private Locale locale;
public Locale getLocale() {
return locale;
}
public void setLocale(Locale locale) {
this.locale = locale;
}
/**
* Optimize the call to the various print methods.
*
* @param name the method name
* @param args the method arguments
* @return the return value
*/
@Override
public Object invokeMethod(String name, Object args) {
// Optimize access to print methods
if (args instanceof Object[]) {
Object[] array = (Object[]) args;
if (array.length == 1) {
if ("print".equals(name)) {
print(array[0]);
return null;
} else if ("println".equals(name)) {
println(array[0]);
return null;
}
}
}
// Back to Groovy method call
return super.invokeMethod(name, args);
}
public final void println(Object o) {
print(o);
println();
}
public final void println() {
try {
write('\n');
} catch (IOException ignore) {
}
}
/**
* We handle in this method a conversion of an object to another one for formatting purposes.
*
* @param o the object to format
* @return the formatted object
*/
private Object format(Object o) {
if (o instanceof Date) {
if (locale != null) {
DateFormat dateFormat = DateFormat.getDateInstance(DateFormat.MEDIUM, locale);
o = dateFormat.format((Date) o);
}
}
//
return o;
}
private String toString(Object o) {
Object f = format(o);
if (f == null) {
return "null";
} else if (f instanceof String) {
return (String) f;
} else {
return o.toString();
}
}
public final void print(Object o) {
try {
if (o instanceof Text) {
write((Text) o);
} else if (o instanceof GString) {
GString gs = (GString) o;
Object[] values = gs.getValues();
for (int i = 0; i < values.length; i++) {
values[i] = format(values[i]);
}
write(o.toString());
} else {
write(toString(o));
}
} catch (IOException ignore) {
}
}
protected abstract Writer getWriter();
protected abstract void write(char c) throws IOException;
protected abstract void write(String s) throws IOException;
protected abstract void write(Text text) throws IOException;
protected abstract void flush() throws IOException;
protected abstract void close() throws IOException;
}