Examples of freemarker.core.Environment

freemarker.core.Environment
Object that represents the runtime environment during template processing. For every invocation of a Template.process() method, a new instance of this object is created, and then discarded when process() returns. This object stores the set of temporary variables created by the template, the value of settings set by the template, the reference to the data model root, etc. Everything that is needed to fulfill the template processing job.
Data models that need to access the Environment object that represents the template processing on the current thread can use the {@link #getCurrentEnvironment()} method.
If you need to modify or read this object before or after the process call, use {@link Template#createProcessingEnvironment(Object rootMap,Writer out,ObjectWrapper wrapper)} @author Jonathan Revusky @author Attila Szegedi

        Writer out = createMock(Writer.class);


        expect(template.getMacros()).andReturn(new HashMap<String, Macro>());


        replay(template, rootDataModel, out);
        new Environment(template, rootDataModel, out);


        assertEquals(new Integer(1), FreemarkerUtil.getAsObject(null, Integer.class, new Integer(1)));
        verify(template, rootDataModel, out);
    }

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        expect(model.getAsNumber()).andThrow(new TemplateModelException());
        expect(template.getMacros()).andReturn(new HashMap<String, Macro>());


        replay(template, rootDataModel, out);
        new Environment(template, rootDataModel, out);


        replay(model);
        try {
            assertEquals(new Integer(42), FreemarkerUtil.getAsObject(model, Integer.class, new Integer(1)));
        } finally {

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        expect(model.get("key")).andReturn(null);
        expect(template.getConfiguration()).andReturn(configuration);
        expect(configuration.getSharedVariable("key")).andReturn(null);


        replay(template, model, valueModel, configuration);
        Environment env = new Environment(template, model, writer);
        env.setVariable("key", valueModel);
        EnvironmentScopeExtractor extractor = new EnvironmentScopeExtractor(env);
        extractor.removeValue("key");
        assertNull(env.getVariable("key"));
        verify(template, model, valueModel, configuration);
    }

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        expect(template.getMacros()).andReturn(new HashMap<Object, Object>());
        expect(template.getConfiguration()).andReturn(configuration);
        expect(configuration.getSharedVariableNames()).andReturn(names);


        replay(template, model, valueModel, configuration);
        Environment env = new Environment(template, model, writer);
        EnvironmentScopeExtractor extractor = new EnvironmentScopeExtractor(env);
        Enumeration<String> keys = extractor.getKeys();
        assertEquals("testGetKeys", keys.nextElement());
        assertFalse(keys.hasMoreElements());
        verify(template, model, valueModel, configuration);

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        expect(template.getConfiguration()).andReturn(configuration);
        expect(configuration.getSharedVariableNames()).andReturn(names);


        replay(template, model, valueModel, configuration, names, namesIt);
        try {
            Environment env = new Environment(template, model, writer);
            EnvironmentScopeExtractor extractor = new EnvironmentScopeExtractor(env);
            extractor.getKeys();
        } finally {
            verify(template, model, valueModel, configuration, names, namesIt);
        }

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        expect(template.getMacros()).andReturn(new HashMap<Object, Object>());
        expect(valueModel.getAsString()).andReturn("value");


        replay(template, model, valueModel, configuration, objectWrapper);
        Environment env = new Environment(template, model, writer);
        env.setVariable("key", valueModel);
        EnvironmentScopeExtractor extractor = new EnvironmentScopeExtractor(env);
        assertEquals("value", extractor.getValue("key"));
        verify(template, model, valueModel, configuration, objectWrapper);
    }

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        expect(model.get("key")).andReturn(null);
        expect(template.getConfiguration()).andReturn(configuration);
        expect(configuration.getSharedVariable("key")).andReturn(null);


        replay(template, model, valueModel, configuration, objectWrapper);
        Environment env = new Environment(template, model, writer);
        EnvironmentScopeExtractor extractor = new EnvironmentScopeExtractor(env);
        assertNull(extractor.getValue("key"));
        verify(template, model, valueModel, configuration, objectWrapper);
    }

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        expect(template.getMacros()).andReturn(new HashMap<Object, Object>());
        expect(model.get("key")).andThrow(new TemplateModelException());


        replay(template, model, valueModel, configuration, objectWrapper);
        try {
            Environment env = new Environment(template, model, writer);
            EnvironmentScopeExtractor extractor = new EnvironmentScopeExtractor(env);
            extractor.getValue("key");
        } finally {
            verify(template, model, valueModel, configuration, objectWrapper);
        }

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        expect(template.getMacros()).andReturn(new HashMap<Object, Object>());
        expect(template.getObjectWrapper()).andReturn(objectWrapper);
        expect(objectWrapper.wrap("value")).andReturn(valueModel);


        replay(template, model, valueModel, configuration, objectWrapper);
        Environment env = new Environment(template, model, writer);
        EnvironmentScopeExtractor extractor = new EnvironmentScopeExtractor(env);
        extractor.setValue("key", "value");
        assertEquals(valueModel, env.getVariable("key"));
        verify(template, model, valueModel, configuration, objectWrapper);
    }

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        expect(template.getObjectWrapper()).andReturn(objectWrapper);
        expect(objectWrapper.wrap("value")).andThrow(new TemplateModelException());


        replay(template, model, valueModel, configuration, objectWrapper);
        try {
            Environment env = new Environment(template, model, writer);
            EnvironmentScopeExtractor extractor = new EnvironmentScopeExtractor(env);
            extractor.setValue("key", "value");
            assertEquals(valueModel, env.getVariable("key"));
        } finally {
            verify(template, model, valueModel, configuration, objectWrapper);
        }
    }

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