org.databene.script.AbstractScript Maven / Gradle / Ivy
/*
* (c) Copyright 2008-2009 by Volker Bergmann. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, is permitted under the terms of the
* GNU General Public License.
*
* For redistributing this software or a derivative work under a license other
* than the GPL-compatible Free Software License as defined by the Free
* Software Foundation or approved by OSI, you must first obtain a commercial
* license to this software product from Volker Bergmann.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
* REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
* HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.databene.script;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import org.databene.commons.Context;
import org.databene.commons.converter.ToStringConverter;
/**
* Abstract implementation of the Script interface.
* When inheriting from it, you must overwrite at least one of the methods
* evaluate() and execute().
*
* Created at 23.12.2008 07:15:39
* @since 0.4.7
* @author Volker Bergmann
*/
public abstract class AbstractScript implements Script {
public Object evaluate(Context context) throws ScriptException {
try {
StringWriter writer = new StringWriter();
execute(context, writer);
return writer.toString();
} catch (IOException e) {
throw new ScriptException(e);
}
}
public void execute(Context context, Writer out) throws ScriptException, IOException {
out.write(ToStringConverter.convert(evaluate(context), ""));
}
}