source: dialogmanager/src/test/java/tudelft/dialogmanager/DemoAppWithAdd.java@ 1108

package tudelft.dialogmanager;

import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.List;

import javax.swing.JOptionPane;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;

import tudelft.dialogmanager.answertypes.InvalidAnswerException;
import tudelft.dialogmanager.parameters.BoolValue;
import tudelft.dialogmanager.parameters.Parameters;
import tudelft.dialogmanager.stimuli.Stimulus;
import tudelft.dialogmanager.stimuli.Textual;
import tudelft.dialogmanager.updatefunctions.UpdateFunction;

public class DemoAppWithAdd {
        private final static ObjectMapper jackson = new ObjectMapper();

        public DemoAppWithAdd()
                        throws JsonParseException, JsonMappingException, IOException {
                jackson.registerSubtypes(MySumFunction.class);

                // initialize from a demo dialog specification
                InputStream stream = getClass().getClassLoader()
                                .getResourceAsStream("dialogdemoWithAdd.json");
                DialogState state = jackson.readValue(stream, DialogState.class);

                // run the demo, using popup dialogs to show questions
                while (!state.isFinal()) {
                        state = state.withUpdate(true);
                        Stimulus stimulus = state.getCurrentPhase().getStimulation()
                                        .substitute(state.getParameters());
                        if (!(stimulus instanceof Textual)) {
                                throw new IllegalStateException(
                                                "The Demo App only supports Textual.");
                        }
                        String answer = JOptionPane
                                        .showInputDialog(((Textual) stimulus).getQuestion());
                        try {
                                state = state.with(answer);
                        } catch (Exception e) {
                                e.printStackTrace();
                                JOptionPane.showMessageDialog(null,
                                                "That was not a valid answer! Please try again");
                        }
                        state = state.withUpdate(false);
                }

        }

        public static void main(String[] args) throws JsonParseException,
                        JsonMappingException, IOException, InvalidAnswerException {
                new DemoAppWithAdd();
        }
}

/**
 * Function that sets result= arg1+arg2 == arg3 (a boolean value). We register
 * this function with the deserializer (see main class above) so that the json
 * file can use "EqualsFunction" to refer to this.
 */
class MySumFunction implements UpdateFunction {

        private final String param1;
        private final String param2;
        private final String sumparam;
        private final String outcomeboolparam;

        @JsonCreator
        public MySumFunction(@JsonProperty("param1") String param1,
                        @JsonProperty("param2") String param2,
                        @JsonProperty("sumparam") String sumparam,
                        @JsonProperty("outcomeboolparam") String outcomeboolparam) {
                this.param1 = param1;
                this.param2 = param2;
                this.sumparam = sumparam;
                this.outcomeboolparam = outcomeboolparam;
        }

        @Override
        public Parameters call(Parameters inparams) {
                return inparams
                                .with(outcomeboolparam,
                                                new BoolValue(inparams.getDouble(param1)
                                                                + inparams.getDouble(param2) == inparams
                                                                                .getDouble(sumparam)));
        }

        @Override
        public List<String> getAssignedParameters() {
                return Arrays.asList(outcomeboolparam);
        }

        @Override
        public int hashCode() {
                final int prime = 31;
                int result = 1;
                result = prime * result + ((outcomeboolparam == null) ? 0
                                : outcomeboolparam.hashCode());
                result = prime * result + ((param1 == null) ? 0 : param1.hashCode());
                result = prime * result + ((param2 == null) ? 0 : param2.hashCode());
                result = prime * result
                                + ((sumparam == null) ? 0 : sumparam.hashCode());
                return result;
        }

        @Override
        public boolean equals(Object obj) {
                if (this == obj)
                        return true;
                if (obj == null)
                        return false;
                if (getClass() != obj.getClass())
                        return false;
                MySumFunction other = (MySumFunction) obj;
                if (outcomeboolparam == null) {
                        if (other.outcomeboolparam != null)
                                return false;
                } else if (!outcomeboolparam.equals(other.outcomeboolparam))
                        return false;
                if (param1 == null) {
                        if (other.param1 != null)
                                return false;
                } else if (!param1.equals(other.param1))
                        return false;
                if (param2 == null) {
                        if (other.param2 != null)
                                return false;
                } else if (!param2.equals(other.param2))
                        return false;
                if (sumparam == null) {
                        if (other.sumparam != null)
                                return false;
                } else if (!sumparam.equals(other.sumparam))
                        return false;
                return true;
        }

}