RandomSec/main/src/com/google/refine/model/Cell.java

/*

Copyright 2010, Google Inc.
All rights reserved.

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modification, are permitted provided that the following conditions are
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    * Redistributions of source code must retain the above copyright
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    * Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
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contributors may be used to endorse or promote products derived from
this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,           
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*/

package com.google.refine.model;

import java.io.IOException;
import java.io.Serializable;
import java.io.Writer;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
import java.util.Properties;

import com.fasterxml.jackson.annotation.JacksonInject;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.InjectableValues;

import com.google.refine.expr.EvalError;
import com.google.refine.expr.ExpressionUtils;
import com.google.refine.expr.HasFields;
import com.google.refine.util.ParsingUtilities;
import com.google.refine.util.Pool;
import com.google.refine.util.StringUtils;

public class Cell implements HasFields {
    @JsonIgnore
    final public Serializable   value;
    @JsonIgnore
    final public Recon          recon;
    
    public Cell(Serializable value, Recon recon) {
        this.value = value;
        this.recon = recon;
    }
    
    @Override
    public Object getField(String name, Properties bindings) {
        if ("value".equals(name)) {
            return value;
        } else if ("recon".equals(name)) {
            return recon;
        }
        return null;
    }
    
    @Override
    public boolean fieldAlsoHasFields(String name) {
        return "recon".equals(name);
    }
    
    @JsonProperty("e")
    @JsonInclude(Include.NON_NULL)
    public String getErrorMessage() {
        if (ExpressionUtils.isError(value)) {
            return ((EvalError) value).message;
        }
        return null;
    }
    
    @JsonProperty("t")
    @JsonInclude(Include.NON_NULL)
    public String getTypeString() {
        if (value instanceof OffsetDateTime || value instanceof LocalDateTime) {
            return "date";
        }
        return null;
    }
    
    @JsonProperty("v")
    @JsonInclude(Include.NON_NULL)
    public String getValueAsString() {
        if (value != null && !ExpressionUtils.isError(value)) {
            Instant instant = null;
            if (value instanceof OffsetDateTime) {
                instant = ((OffsetDateTime)value).toInstant();
            } else if (value instanceof LocalDateTime) {
                instant = ((LocalDateTime)value).toInstant(ZoneOffset.of("Z"));
            }
            
            if (instant != null) {
                return ParsingUtilities.instantToString(instant);
            } else if (value instanceof Double 
                    && (((Double)value).isNaN() || ((Double)value).isInfinite())) {
                // write as a string
                 return ((Double)value).toString();
            } else if (value instanceof Float
                    && (((Float)value).isNaN() || ((Float)value).isInfinite())) {
                // TODO: Skip?  Write as string?
                return ((Float)value).toString();
            } else {
                return value.toString();
            }
        } else {
           return null;
        }
    }
    
    /**
     * TODO
     * - use JsonIdentityInfo on recon
     * - implement custom resolver to tie it to a pool
     * - figure it all out
     * @return
     */
    @JsonProperty("r")
    @JsonInclude(Include.NON_NULL)
    public String getReconIdString() {
        if (recon != null) {
            return Long.toString(recon.id);
        }
        return null;
    }
    
    public void save(Writer writer, Properties options) {
        try {
            Pool pool = (Pool)options.get("pool");
            if(pool != null && recon != null) {
                pool.pool(recon);
            }
            ParsingUtilities.saveWriter.writeValue(writer, this);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    static public Cell loadStreaming(String s, Pool pool) throws Exception {
        InjectableValues injectableValues = new InjectableValues.Std()
                .addValue("pool", pool);
        return ParsingUtilities.mapper.setInjectableValues(injectableValues)
                .readValue(s, Cell.class);
    }
    
    @JsonCreator
    static public Cell deserialize(
            @JsonProperty("v")
            Object value,
            @JsonProperty("t")
            String type,
            @JsonProperty("r")
            String reconId,
            @JsonProperty("e")
            String error,
            @JacksonInject("pool")
            Pool pool) {
        Recon recon = null;
        if(reconId != null) {
            recon = pool.getRecon(reconId);
        }
        if (type != null && "date".equals(type)) {
            value = ParsingUtilities.stringToDate((String) value); 
        }
        if (error != null) {
            value = new EvalError(error);
        }
        return new Cell((Serializable)value, recon);
    }
    
    @Override
    public String toString() {
        return StringUtils.toString(value);
    }
}