home | career | drupal | java | mac | mysql | perl | scala | uml | unix

Groovy example source code file (JsonToken.java)

This example Groovy source code file (JsonToken.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

bigdecimal, bigdecimal, biginteger, biginteger, e, false, float, jsontokentype, jsontokentype, math, max_double, min_long, string, string, true

The Groovy JsonToken.java source code

/*
 * Copyright 2003-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package groovy.json;

import java.math.BigDecimal;
import java.math.BigInteger;

import static groovy.json.JsonTokenType.*;

/**
 * A JSON token, with a type, line / column information, and the text of that token.
 *
 * @author Guillaume Laforge
 * @since 1.8.0
 */
public class JsonToken {
    private static final BigInteger MAX_LONG    = BigInteger.valueOf(Long.MAX_VALUE);
    private static final BigInteger MIN_LONG    = BigInteger.valueOf(Long.MIN_VALUE);
    private static final BigInteger MAX_INTEGER = BigInteger.valueOf(Integer.MAX_VALUE);
    private static final BigInteger MIN_INTEGER = BigInteger.valueOf(Integer.MIN_VALUE);
    private static final BigDecimal MAX_DOUBLE  = new BigDecimal(String.valueOf(Double.MAX_VALUE));
    private static final BigDecimal MIN_DOUBLE  = MAX_DOUBLE.negate();
    private static final BigDecimal MAX_FLOAT   = new BigDecimal(String.valueOf(Float.MAX_VALUE));
    private static final BigDecimal MIN_FLOAT   = MAX_FLOAT.negate();

    /** Start line position */
    private long startLine;
    /** End line position */
    private long endLine;
    /** Start column position */
    private long startColumn;
    /** End column position */
    private long endColumn;

    /** The type of the token */
    private JsonTokenType type;

    /** The text of that token */
    private String text;

    /**
     * Return the value represented by this token (ie. a number, a string, a boolean or null).
     * For numbers, the most appropriate type is returned (Float, Double, BigDecimal for decimal numbers,
     * and Integer, Long and BigInteger for integral numbers).
     *
     * @return the represented value
     */
    public Object getValue() {
        if (type == STRING) {
            if (text.length() == 2) {
                return "";
            } else {
                return text.substring(1, text.length() - 1);
            }
        } else if (type == NUMBER) {
            if (text.contains(".") || text.contains("e") || text.contains("E")) {
                // a decimal number
                BigDecimal v = new BigDecimal(text);
                if(v.compareTo(MAX_FLOAT) <= 0 && v.compareTo(MIN_FLOAT) >= 0) {
                    return new Float(text);
                } else if(v.compareTo(MAX_DOUBLE) <= 0 && v.compareTo(MIN_DOUBLE) >= 0) {
                    return new Double(text);
                } else {
                    return v;
                }
            } else {
                // an integer number
                BigInteger v = new BigInteger(text);
                if(v.compareTo(MAX_INTEGER) <= 0 && v.compareTo(MIN_INTEGER) >= 0 ) {
                    return v.intValue();
                } else if (v.compareTo(MAX_LONG) <= 0 && v.compareTo(MIN_LONG) >= 0 ) {
                    return v.longValue();
                } else {
                    return v;
                }
            }
        } else if (type == TRUE) {
            return true;
        } else if (type == FALSE) {
            return false;
        } else if (type == NULL) {
            return null;
        } else {
            throw new JsonException(
                    "No appropriate value represented by '" + text +
                    "' on line: " + startLine + ", column: " + startColumn
            );
        }
    }

    public String toString() {
        return text + " (" + type + ") [" + startLine + ":" + startColumn + "-" + endLine + ":" + endColumn + "]";
    }

    public long getStartLine() {
        return startLine;
    }

    public void setStartLine(long startLine) {
        this.startLine = startLine;
    }

    public long getEndLine() {
        return endLine;
    }

    public void setEndLine(long endLine) {
        this.endLine = endLine;
    }

    public long getStartColumn() {
        return startColumn;
    }

    public void setStartColumn(long startColumn) {
        this.startColumn = startColumn;
    }

    public long getEndColumn() {
        return endColumn;
    }

    public void setEndColumn(long endColumn) {
        this.endColumn = endColumn;
    }

    public JsonTokenType getType() {
        return this.type;
    }

    public void setType(JsonTokenType type) {
        this.type = type;
    }

    public void setText(String text) {
        this.text = text;
    }

    public String getText() {
        return this.text;
    }
}

Other Groovy examples (source code examples)

Here is a short list of links related to this Groovy JsonToken.java source code file:

new blog posts

 

Copyright 1998-2013 Alvin Alexander, alvinalexander.com
All Rights Reserved.