Examples of freemarker.template.SimpleSequence

freemarker.template.SimpleSequence

A convenient implementation of a list. This object implements {@link TemplateSequenceModel}, using an underlying java.util.List implementation.

A SimpleSequence can act as a cache for a TemplateCollectionModel, e.g. one that gets data from a database. When passed a TemplateCollectionModel as an argument to its constructor, the SimpleSequence immediately copies all the elements and discards the TemplateCollectionModel.

This class is thread-safe if you don't call the add method after you have made the object available for multiple threads.
Note:
As of 2.0, this class is unsynchronized by default. To obtain a synchronized wrapper, call the {@link #synchronizedWrapper} method.
@version $Id: SimpleSequence.java,v 1.53 2005/06/21 18:17:54 ddekany Exp $ @see SimpleHash @see SimpleScalar

    
    // A hacky routine used by VisitNode and RecurseNode
    
    TemplateSequenceModel evaluateStringsToNamespaces(Environment env) throws TemplateException {
        TemplateSequenceModel val = (TemplateSequenceModel) eval(env);
        SimpleSequence result = new SimpleSequence(val.size());
        for (int i=0; i<items.size(); i++) {
            Object itemExpr = items.get(i);
            if (itemExpr instanceof StringLiteral) {
                String s = ((StringLiteral) itemExpr).getAsString();
                try {
                    Environment.Namespace ns = env.importLib(s, null);
                    result.add(ns);
                } 
                catch (IOException ioe) {
                    throw new _MiscTemplateException(((StringLiteral) itemExpr), new Object[] {
                            "Couldn't import library ", new _DelayedJQuote(s), ": ",
                            new _DelayedGetMessage(ioe) });
                }
            }
            else {
                result.add(val.get(i));
            }
        }
        return result;
    }

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        protected Set keySet() {
            return ((Map) object).keySet();
        }


        public TemplateCollectionModel values() {
            return new CollectionAndSequence(new SimpleSequence(((Map) object).values(), wrapper));
        }

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        protected Set keySet() {
            return ((Map) object).keySet();
        }


        public TemplateCollectionModel values() {
            return new CollectionAndSequence(new SimpleSequence(((Map) object).values(), wrapper));
        }

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    public int size() {
        return map.size();
    }


    public TemplateCollectionModel keys() {
        return new CollectionAndSequence(new SimpleSequence(map.keySet(), getObjectWrapper()));
    }

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    public TemplateCollectionModel keys() {
        return new CollectionAndSequence(new SimpleSequence(map.keySet(), getObjectWrapper()));
    }


    public TemplateCollectionModel values() {
        return new CollectionAndSequence(new SimpleSequence(map.values(), getObjectWrapper()));
    }

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    public static class WordList extends StringFunctions {
        @Override
        public TemplateModel apply(String string, Environment env, BuiltInExpression caller) {
            StringTokenizer st = new StringTokenizer(string);
            SimpleSequence result = new SimpleSequence();
            while (st.hasMoreTokens()) {
                result.add(st.nextToken());
            }
            return result;
        }

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        return wrapper.keyCount(object.getClass());
    }


    public TemplateCollectionModel keys()
    {
        return new CollectionAndSequence(new SimpleSequence(keySet(), wrapper));
    }

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        TemplateModelIterator it = keys().iterator();
        while (it.hasNext()) {
            String key = ((TemplateScalarModel)it.next()).getAsString();
            values.add(get(key));
        }
        return new CollectionAndSequence(new SimpleSequence(values, wrapper));
    }

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      }
      return result;
    }


    TemplateModel _getAsTemplateModel(Environment env) throws TemplateException {
        SimpleSequence list = new SimpleSequence(values.size());
        for (Iterator it = values.iterator(); it.hasNext();) {
            Expression exp = (Expression) it.next();
            TemplateModel tm = exp.getAsTemplateModel(env);
            assertIsDefined(tm, exp, env);
            list.add(tm);
        }
        return list;
    }

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    // A hacky routine used by VisitNode and RecurseNode
    
    TemplateSequenceModel evaluateStringsToNamespaces(Environment env) throws TemplateException {
        TemplateSequenceModel val = (TemplateSequenceModel) getAsTemplateModel(env);
        SimpleSequence result = new SimpleSequence(val.size());
        for (int i=0; i<values.size(); i++) {
            if (values.get(i) instanceof StringLiteral) {
                String s = ((StringLiteral) values.get(i)).getAsString();
                try {
                    TemplateNamespace ns = env.importLib(s, null);
                    result.add(ns);
                } 
                catch (IOException ioe) {
                    throw new TemplateException("Could not import library '" + s + "', " + ioe.getMessage(), env); 
                }
            }
            else {
                result.add(val.get(i));
            }
        }
        return result;
    }

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