All Downloads are FREE. Search and download functionalities are using the official Maven repository.
  • Log In
  • Register

    • io.mindmaps.graql.internal.template.Value Maven / Gradle / Ivy

    /*
 * MindmapsDB - A Distributed Semantic Database
 * Copyright (C) 2016  Mindmaps Research Ltd
 *
 * MindmapsDB is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * MindmapsDB is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with MindmapsDB. If not, see .
 */

package io.mindmaps.graql.internal.template;

import java.util.List;
import java.util.function.Function;

public class Value {

    public static final Value NULL = new Value();
    public static final Value VOID = new Value();

    private Object value;

    private Value(){
        value = new Object();
    }

    public Value(Object value){
        if(value == null){
            throw new RuntimeException("value is null");
        }

        this.value = value;

        if(!(isString() || isList()|| isBoolean() || isNumber())){
            throw new RuntimeException("unsupported type for " + value);
        }
    }

    public boolean isString(){
        return value instanceof String;
    }

    public boolean isDouble(){
        return value instanceof Double;
    }

    public boolean isInteger(){
        return value instanceof Integer;
    }

    public boolean isNumber(){
        return value instanceof Number;
    }

    public boolean isList(){
        return value instanceof List;
    }

    public boolean isBoolean(){
        return value instanceof Boolean;
    }

    public boolean isNull(){
        return this == NULL;
    }

    public boolean isVoid(){
        return this == VOID;
    }

    public String asString(){
        return (String) value;
    }

    public double asDouble(){
        return (Double) value;
    }

    public int asInteger(){
        return (Integer) value;
    }

    public List asList(){
        return (List) value;
    }

    public boolean asBoolean(){
        return (Boolean) value;
    }

    public static Value concat(Value... values){
        if(values.length == 1){
            return values[0];
        }

        StringBuilder builder = new StringBuilder();
        for(Value value:values){
            builder.append(value.toString());
        }

        return new Value(builder.toString());
    }

    // FORMATS

    public static Function format = (val) -> {
        if(val.isString()){
            return "\"" + val + "\"";
        }

        return val.toString();
    };

    public static Function formatVar = (var) -> {
        String variable = var.toString();
        if(variable.contains(" ")){
            return variable.replaceAll("(\\S)\\s(\\S)", "$1-$2");
        }

        return variable;
    };

    public static Function identity = Value::toString;

    @Override
    public String toString() {
        return isNull() ? "null" : isVoid() ? "" : value.toString();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        Value value1 = (Value) o;

        return value.equals(value1.value);

    }

    @Override
    public int hashCode() {
        return value.hashCode();
    }
}
    
    
    
    

    




    
    
    © 2015 - 2025 Weber Informatics LLC | Privacy Policy