builtin.java

freemaker安装软件

        private class BIMethod implements TemplateMethodModelEx {
            private String s;

            private BIMethod(String s) {
                this.s = s;
            }

            public Object exec(List args) throws TemplateModelException {
                Object obj;
                String sub;

                int ln  = args.size();
                if (ln == 0) {
                    throw new TemplateModelException(
                            "?last_index_of(...) expects at least one argument.");
                }
                if (ln > 2) {
                    throw new TemplateModelException(
                            "?last_index_of(...) expects at most two arguments.");
                }

                obj = args.get(0);
                if (!(obj instanceof TemplateScalarModel)) {
                    throw new TemplateModelException(
                            "?last_index_of(...) expects a string as "
                            + "its first argument.");
                }
                sub = ((TemplateScalarModel) obj).getAsString();

                if (ln > 1) {
                    obj = args.get(1);
                    if (!(obj instanceof TemplateNumberModel)) {
                        throw new TemplateModelException(
                                "?last_index_of(...) expects a number as "
                                + "its second argument.");
                    }
                    int fidx = ((TemplateNumberModel) obj).getAsNumber().intValue();
                    return new SimpleNumber(s.lastIndexOf(sub, fidx));
                } else {
                    return new SimpleNumber(s.lastIndexOf(sub));
                }
            }
        }
    }
    
    static class starts_withBI extends BuiltIn {
        TemplateModel _getAsTemplateModel(Environment env)
                throws TemplateException {
            TemplateModel model = target.getAsTemplateModel(env);
            if (model instanceof TemplateScalarModel) {
                return new BIMethod(((TemplateScalarModel) model).getAsString());
            }
            throw invalidTypeException(model, target, env, "string");
        }

        private class BIMethod implements TemplateMethodModelEx {
            private String s;

            private BIMethod(String s) {
                this.s = s;
            }

            public Object exec(List args) throws TemplateModelException {
                String sub;

                if (args.size() != 1) {
                    throw new TemplateModelException(
                            "?starts_with(...) expects exactly 1 argument.");
                }

                Object obj = args.get(0);
                if (!(obj instanceof TemplateScalarModel)) {
                    throw new TemplateModelException(
                            "?starts_with(...) expects a string argument");
                }
                sub = ((TemplateScalarModel) obj).getAsString();

                return s.startsWith(sub) ?
                        TemplateBooleanModel.TRUE : TemplateBooleanModel.FALSE;
            }
        }
    }

    static class ends_withBI extends BuiltIn {
        TemplateModel _getAsTemplateModel(Environment env)
                throws TemplateException {
            TemplateModel model = target.getAsTemplateModel(env);
            if (model instanceof TemplateScalarModel) {
                return new BIMethod(((TemplateScalarModel) model).getAsString());
            }
            throw invalidTypeException(model, target, env, "string");
        }

        private class BIMethod implements TemplateMethodModelEx {
            private String s;

            private BIMethod(String s) {
                this.s = s;
            }

            public Object exec(List args) throws TemplateModelException {
                String sub;

                if (args.size() != 1) {
                    throw new TemplateModelException(
                            "?ends_with(...) expects exactly 1 argument.");
                }

                Object obj = args.get(0);
                if (!(obj instanceof TemplateScalarModel)) {
                    throw new TemplateModelException(
                            "?ends_with(...) expects a string argument");
                }
                sub = ((TemplateScalarModel) obj).getAsString();

                return s.endsWith(sub) ?
                        TemplateBooleanModel.TRUE : TemplateBooleanModel.FALSE;
            }
        }
    }
    
    static class replaceBI extends BuiltIn {
        TemplateModel _getAsTemplateModel(Environment env)
                throws TemplateException {
            TemplateModel model = target.getAsTemplateModel(env);
            if (model instanceof TemplateScalarModel) {
                return new BIMethod(((TemplateScalarModel) model).getAsString());
            }
            throw invalidTypeException(model, target, env, "string");
        }

        private class BIMethod implements TemplateMethodModel {
            private String s;

            private BIMethod(String s) {
                this.s = s;
            }

            public Object exec(List args) throws TemplateModelException {
                int numArgs = args.size();
                if (numArgs < 2 || numArgs > 3) {
                    throw new TemplateModelException(
                            "?replace(...) needs 2 or 3 arguments.");
                }
                String first = (String) args.get(0);
                String second = (String) args.get(1);
                String flags = numArgs >2 ? (String) args.get(2) : "";
                boolean caseInsensitive = flags.indexOf('i') >=0;
                boolean firstOnly = flags.indexOf('f') >=0;
                if (flags.indexOf('r') >=0) {
                    throw new TemplateModelException("The regular expression classes are not available.");
                }
                return new SimpleScalar(StringUtil.replace(
                        s, first, second, caseInsensitive, firstOnly));
            }
        }
    }

    static class splitBI extends BuiltIn {
        TemplateModel _getAsTemplateModel(Environment env)
                throws TemplateException {
            TemplateModel model = target.getAsTemplateModel(env);
            if (model instanceof TemplateScalarModel) {
                return new BIMethod(((TemplateScalarModel) model).getAsString());
            }
            throw invalidTypeException(model, target, env, "string");
        }

        private class BIMethod implements TemplateMethodModel {
            private String s;

            private BIMethod(String s) {
                this.s = s;
            }

            public Object exec(List args) throws TemplateModelException {
                int numArgs = args.size();
                if (numArgs != 1 && numArgs !=2) {
                    throw new TemplateModelException(
                            "?split(...) expects 1 or 2 arguments.");
                }
                String splitString = (String) args.get(0);
                String flags = numArgs ==2 ? (String) args.get(1) : "";
                boolean caseInsensitive = flags.indexOf('i') >=0;
                if (flags.indexOf('r') >=0) {
                    throw new TemplateModelException("regular expression classes not available");
                }
                return new StringArraySequence(StringUtil.split(
                        s, splitString, caseInsensitive));
            }
        }
    }

    static class left_padBI extends BuiltIn {
        TemplateModel _getAsTemplateModel(Environment env)
                throws TemplateException {
            TemplateModel model = target.getAsTemplateModel(env);
            if (model instanceof TemplateScalarModel) {
                return new BIMethod(((TemplateScalarModel) model).getAsString());
            }
            throw invalidTypeException(model, target, env, "string");
        }

        private class BIMethod implements TemplateMethodModelEx {
            private String s;

            private BIMethod(String s) {
                this.s = s;
            }

            public Object exec(List args) throws TemplateModelException {
                Object obj;

                int ln  = args.size();
                if (ln == 0) {
                    throw new TemplateModelException(
                            "?left_pad(...) expects at least 1 argument.");
                }
                if (ln > 2) {
                    throw new TemplateModelException(
                            "?left_pad(...) expects at most 2 arguments.");
                }

                obj = args.get(0);
                if (!(obj instanceof TemplateNumberModel)) {
                    throw new TemplateModelException(
                            "?left_pad(...) expects a number as "
                            + "its 1st argument.");
                }
                int width = ((TemplateNumberModel) obj).getAsNumber().intValue();

                if (ln > 1) {
                    obj = args.get(1);
                    if (!(obj instanceof TemplateScalarModel)) {
                        throw new TemplateModelException(
                                "?left_pad(...) expects a string as "
                                + "its 2nd argument.");
                    }
                    String filling = ((TemplateScalarModel) obj).getAsString();
                    try {
                        return new SimpleScalar(StringUtil.leftPad(s, width, filling));
                    } catch (IllegalArgumentException e) {
                        if (filling.length() == 0) {
                            throw new TemplateModelException(
                                    "The 2nd argument of ?left_pad(...) "
                                    + "can't be a 0 length string.");
                        } else {
                            throw new TemplateModelException(
                                    "Error while executing the ?left_pad(...) "
                                    + "built-in.", e);
                        }
                    }
                } else {
                    return new SimpleScalar(StringUtil.leftPad(s, width));
                }
            }
        }
    }

    static class right_padBI extends BuiltIn {
        TemplateModel _getAsTemplateModel(Environment env)
                throws TemplateException {
            TemplateModel model = target.getAsTemplateModel(env);
            if (model instanceof TemplateScalarModel) {
                return new BIMethod(((TemplateScalarModel) model).getAsString());
            }
            throw invalidTypeException(model, target, env, "string");
        }

        private class BIMethod implements TemplateMethodModelEx {
            private String s;

            private BIMethod(String s) {
                this.s = s;
            }

            public Object exec(List args) throws TemplateModelException {
                Object obj;

                int ln  = args.size();
                if (ln == 0) {
                    throw new TemplateModelException(
                            "?right_pad(...) expects at least 1 argument.");
                }
                if (ln > 2) {
                    throw new TemplateModelException(
                            "?right_pad(...) expects at most 2 arguments.");
                }

                obj = args.get(0);
                if (!(obj instanceof TemplateNumberModel)) {
                    throw new TemplateModelException(
                            "?right_pad(...) expects a number as "
                            + "its 1st argument.");
                }
                int width = ((TemplateNumberModel) obj).getAsNumber().intValue();

                if (ln > 1) {
                    obj = args.get(1);
                    if (!(obj instanceof TemplateScalarModel)) {
                        throw new TemplateModelException(
                                "?right_pad(...) expects a string as "
                                + "its 2nd argument.");
                    }
                    String filling = ((TemplateScalarModel) obj).getAsString();
                    try {
                        return new SimpleScalar(StringUtil.rightPad(s, width, filling));
                    } catch (IllegalArgumentException e) {
                        if (filling.length() == 0) {
                            throw new TemplateModelException(
                                    "The 2nd argument of ?right_pad(...) "
                                    + "can't be a 0 length string.");
                        } else {
                            throw new TemplateModelException(
                                    "Error while executing the ?right_pad(...) "
                                    + "built-in.", e);
                        }
                    }
                } else {
                    return new SimpleScalar(StringUtil.rightPad(s, width));
                }
            }
        }
    }
    
}