Source Code Cross Referenced for TupleFloat.java in  » Workflow-Engines » pegasus-2.1.0 » org » griphyn » vdl » annotation » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Workflow Engines » pegasus 2.1.0 » org.griphyn.vdl.annotation 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * This file or a portion of this file is licensed under the terms of
003:         * the Globus Toolkit Public License, found in file GTPL, or at
004:         * http://www.globus.org/toolkit/download/license.html. This notice must
005:         * appear in redistributions of this file, with or without modification.
006:         *
007:         * Redistributions of this Software, with or without modification, must
008:         * reproduce the GTPL in: (1) the Software, or (2) the Documentation or
009:         * some other similar material which is provided with the Software (if
010:         * any).
011:         *
012:         * Copyright 1999-2004 University of Chicago and The University of
013:         * Southern California. All rights reserved.
014:         */
015:        package org.griphyn.vdl.annotation;
016:
017:        import java.sql.Types;
018:
019:        /**
020:         * This simple class defines the double values for the values at the
021:         * heart of Yong's annotations. 
022:         *
023:         * @author Jens-S. Vöckler
024:         * @author Yong Zhao
025:         * @version $Revision: 50 $
026:         */
027:        public class TupleFloat extends Tuple {
028:            /**
029:             * Defines the key for which we store the annotation.
030:             */
031:            private double m_value = 0.0;
032:
033:            /**
034:             * Constructs an instance of a double tuple.
035:             *
036:             * @param key is the key to store annotations for.
037:             * @param value is the double value of the annotation.
038:             */
039:            public TupleFloat(String key, double value) {
040:                super (key);
041:                m_value = value;
042:            }
043:
044:            /**
045:             * Obtains the current value of the value part.
046:             *
047:             * @return the current value as double.
048:             * @see #setDouble( double )
049:             */
050:            public double getDouble() {
051:                return m_value;
052:            }
053:
054:            /**
055:             * Overwrites the current value of the value part.
056:             *
057:             * @param value is the new value to use from now on.
058:             * @see #getDouble()
059:             */
060:            public void setDouble(double value) {
061:                m_value = value;
062:            }
063:
064:            /**
065:             * Return generically the value wrapped into a Java class.
066:             *
067:             * @return the value wrapped as Java object.
068:             * @see #setValue( Object )
069:             * @see java.lang.Double
070:             */
071:            public Object getValue() {
072:                return new Double(m_value);
073:            }
074:
075:            /**
076:             * Generic interface to set a value in an instance. Note that this
077:             * action may fail, if the instance is of an incompatible type.
078:             *
079:             * @param value is the data object to set. 
080:             * @see #getValue()
081:             * @exception ClassCastException if the actual argument type of the value
082:             * is incompatible with the value maintained by the instance.
083:             * @exception NumberFormatException if the String does not contain
084:             * something that is parsable into a double value. */
085:            public void setValue(Object value) throws ClassCastException {
086:                if (value instanceof  java.lang.Number)
087:                    m_value = ((Number) value).doubleValue();
088:                else if (value instanceof  java.lang.String)
089:                    m_value = Double.parseDouble((String) value);
090:                else
091:                    throw new ClassCastException(
092:                            "type cast failed: not a number");
093:            }
094:
095:            /**
096:             * Returns the type of the value as SQL Type.
097:             *
098:             * @return a constant from the set of SQL types. 
099:             * @see java.sql.Types
100:             */
101:            public int getType() {
102:                return java.sql.Types.DOUBLE;
103:            }
104:
105:            /**
106:             * Returns the string representation of the type.
107:             */
108:            public String getTypeString() {
109:                return "float";
110:            }
111:        }
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