package org.webslinger.macros;

 import java.io.IOException;

 import java.io.Writer;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.Map;

 import org.apache.bsf.BSFException;

 import org.webslinger.PathContext;

 import org.webslinger.Webslinger;

 import org.webslinger.template.TemplateMacro;

 import org.webslinger.template.TemplateManager;

 public abstract class AbstractSimpleMacro implements TemplateMacro {

     private final String name;

     private final boolean withTemplate;

     private final boolean isBlock;

     protected AbstractSimpleMacro(String name, boolean withTemplate, boolean isBlock) {

         this.name = name;

         this.withTemplate = withTemplate;

         this.isBlock = isBlock;

     }

     public String getName() {

         return name;

     }

     public boolean isBlock() {

         return isBlock;

     }

     public boolean withTemplate() {

         return withTemplate;

     }

     public boolean render(TemplateManager manager, Object parent, Writer writer, Args args, Map<String, Object> context, Body body) throws IOException, BSFException {

         return render(manager, (Webslinger) parent, writer, args, context, body);

     }

     protected abstract boolean render(TemplateManager manager, Webslinger parent, Writer writer, Args args, Map<String, Object> context, Body body) throws IOException, BSFException;

     public TemplateMacro newInstance(TemplateManager manager, Object parent, Args args) throws IOException, BSFException {

         return this;

     }

     protected PathContext[] getTemplates(Webslinger parent, Args args, int templateIndex) throws IOException, BSFException {

         if (!withTemplate()) return new PathContext[0];

         Object[] found = args.getIndexed("template", templateIndex);

         List<PathContext> pcs = new ArrayList<PathContext>(found.length);

         for (int i = 0; i < found.length; i++) {

             pcs.add(parent.resolvePath(found[i]));

         }

         return pcs.toArray(new PathContext[pcs.size()]);

     }

     protected PathContext getTemplate(Webslinger parent, Args args, int templateIndex) throws IOException, BSFException {

         return parent.resolvePath(withTemplate() ? args.get("template", templateIndex) : null);

     }

 }