svn-gvsig-desktop / tags / v1_1_Build_1012 / libraries / libGDBMS / src / main / java / com / hardcode / gdbms / engine / values / ValueFactory.java @ 12987
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package com.hardcode.gdbms.engine.values; |
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import com.hardcode.gdbms.engine.instruction.SemanticException; |
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import com.hardcode.gdbms.parser.SQLEngineConstants; |
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|
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import java.lang.reflect.Constructor; |
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import java.lang.reflect.InvocationTargetException; |
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import java.sql.Time; |
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import java.sql.Timestamp; |
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import java.sql.Types; |
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|
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import java.text.DateFormat; |
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import java.text.ParseException; |
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import java.text.SimpleDateFormat; |
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|
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import java.util.Date; |
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import java.util.TimeZone; |
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|
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/**
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* Factor?a abstracta de objetos value que dado un tipo b?sico, devuelve el
|
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* wrapper apropiado
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*
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* @author $author$
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* @version $Revision: 12987 $
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*/
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public class ValueFactory { |
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final static int BYTE = 0; |
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final static int SHORT = 1; |
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final static int INTEGER = 2; |
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final static int LONG = 3; |
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final static int FLOAT = 5; |
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final static int DOUBLE = 6; |
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/**
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* Crea un objeto de tipo Value a partir de un int
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*
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* @param n valor que se quiere representar
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*
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* @return objeto Value con el valor que se pasa como par?metro
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*/
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public static IntValue createValue(int n) { |
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IntValue ret = new IntValue();
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ret.setValue(n); |
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return ret;
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} |
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/**
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* Crea un objeto de tipo Value a partir de un long
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*
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* @param l valor que se quiere representar
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*
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* @return objeto Value con el valor que se pasa como par?metro
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*/
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public static LongValue createValue(long l) { |
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LongValue ret = new LongValue();
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ret.setValue(l); |
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return ret;
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} |
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/**
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* Crea un objeto de tipo Value a partir de un String
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*
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* @param s valor que se quiere representar
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*
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* @return objeto Value con el valor que se pasa como par?metro
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*/
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public static StringValue createValue(String s) { |
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StringValue ret = new StringValue();
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ret.setValue(s); |
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return ret;
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} |
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/**
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* Crea un objeto de tipo Value a partir de un float
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*
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* @param f valor que se quiere representar
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*
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* @return objeto Value con el valor que se pasa como par?metro
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*/
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public static FloatValue createValue(float f) { |
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FloatValue ret = new FloatValue();
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ret.setValue(f); |
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return ret;
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} |
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/**
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* Crea un objeto de tipo Value a partir de un double
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*
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* @param d valor que se quiere representar
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*
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* @return objeto Value con el valor que se pasa como par?metro
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*/
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public static DoubleValue createValue(double d) { |
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DoubleValue ret = new DoubleValue();
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ret.setValue(d); |
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return ret;
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} |
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/**
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* Crea un objeto de tipo Date a partir de un Date
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*
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* @param d valor que se quiere representar
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*
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* @return objeto Value con el valor que se pasa como par?metro
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*/
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public static DateValue createValue(Date d) { |
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DateValue ret = new DateValue();
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ret.setValue(d); |
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return ret;
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} |
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/**
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* Creates a TimeValue object
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*
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* @param t Time value
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*
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* @return TimeValue
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*/
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public static TimeValue createValue(Time t) { |
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TimeValue ret = new TimeValue();
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ret.setValue(t); |
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return ret;
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} |
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/**
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* Creates a TimestampValue object
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*
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* @param t Timestamp value
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*
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* @return TimestampValue
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*/
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public static TimestampValue createValue(Timestamp t) { |
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TimestampValue ret = new TimestampValue();
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ret.setValue(t); |
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return ret;
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} |
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/**
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* Crea un objeto de tipo Value a partir de un booleano
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*
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* @param b valor que se quiere representar
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*
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* @return objeto Value con el valor que se pasa como par?metro
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*/
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public static BooleanValue createValue(boolean b) { |
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BooleanValue ret = new BooleanValue();
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ret.setValue(b); |
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return ret;
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} |
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/**
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* Creates an ArrayValue
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*
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* @param values DOCUMENT ME!
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*
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* @return ArrayValue
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*/
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public static ValueCollection createValue(Value[] values) { |
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ValueCollection v = new ValueCollection();
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v.setValues(values); |
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return v;
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} |
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/**
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* Crea un Value a partir de un literal encontrado en una instrucci?n y su
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* tipo
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*
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* @param text Texto del valor
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* @param type Tipo del valor
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*
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* @return Objeto Value del tipo adecuado
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*
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* @throws SemanticException Si el tipo del literal no est? soportado
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*/
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public static Value createValue(String text, int type) |
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throws SemanticException {
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switch (type) {
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case SQLEngineConstants.STRING_LITERAL:
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StringValue r1 = new StringValue();
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r1.setValue(text.substring(1, text.length() - 1)); |
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return r1;
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case SQLEngineConstants.INTEGER_LITERAL:
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try {
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IntValue r2 = new IntValue();
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r2.setValue(Integer.parseInt(text));
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return r2;
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} catch (NumberFormatException e) { |
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LongValue r2 = new LongValue();
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r2.setValue(Long.parseLong(text));
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return r2;
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} |
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case SQLEngineConstants.FLOATING_POINT_LITERAL:
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try {
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FloatValue r2 = new FloatValue();
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r2.setValue(Float.parseFloat(text));
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return r2;
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} catch (NumberFormatException e) { |
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DoubleValue r2 = new DoubleValue();
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r2.setValue(Double.parseDouble(text));
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return r2;
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} |
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default:
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throw new SemanticException("Unexpected literal type: " + text + |
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"->" + type);
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} |
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} |
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/**
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* DOCUMENT ME!
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*
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* @param text DOCUMENT ME!
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* @param type DOCUMENT ME!
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*
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* @return DOCUMENT ME!
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*
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* @throws ParseException DOCUMENT ME!
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*/
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public static Value createValueByType(String text, int type) |
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throws ParseException { |
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Value value; |
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switch (type) {
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case Types.BIGINT: |
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value = ValueFactory.createValue(Long.parseLong(text.trim()));
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break;
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case Types.BIT: |
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case Types.BOOLEAN: |
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value = ValueFactory.createValue(Boolean.valueOf(text.trim())
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.booleanValue()); |
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break;
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case Types.CHAR: |
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case Types.VARCHAR: |
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case Types.LONGVARCHAR: |
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value = ValueFactory.createValue(text); |
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break;
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case Types.DATE: |
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try {
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value = ValueFactory.createValue(new Date(Date.parse(text.trim()))); |
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}catch (IllegalArgumentException e) { |
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throw new ParseException(e.getMessage(),0); |
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} |
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break;
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case Types.DECIMAL: |
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case Types.NUMERIC: |
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case Types.FLOAT: |
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case Types.DOUBLE: |
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value = ValueFactory.createValue(Double.parseDouble(text.trim()));
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break;
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case Types.INTEGER: |
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value = ValueFactory.createValue(Integer.parseInt(text.trim()));
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break;
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case Types.REAL: |
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value = ValueFactory.createValue(Float.parseFloat(text.trim()));
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break;
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case Types.SMALLINT: |
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value = ValueFactory.createValue(Short.parseShort(text.trim()));
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break;
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case Types.TINYINT: |
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value = ValueFactory.createValue(Byte.parseByte(text.trim()));
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break;
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case Types.BINARY: |
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case Types.VARBINARY: |
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case Types.LONGVARBINARY: |
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if ((text.length() / 2) != (text.length() / 2.0)) { |
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throw new ParseException("binary fields must have even number of characters.", |
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0);
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} |
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byte[] array = new byte[text.length() / 2]; |
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for (int i = 0; i < (text.length() / 2); i++) { |
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String byte_ = text.substring(2 * i, (2 * i) + 2); |
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array[i] = (byte) Integer.parseInt(byte_, 16); |
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} |
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value = ValueFactory.createValue(array); |
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break;
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case Types.TIMESTAMP: |
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value = ValueFactory.createValue(Timestamp.valueOf(text.trim()));
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break;
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case Types.TIME: |
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DateFormat tf = DateFormat.getTimeInstance(); |
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value = ValueFactory.createValue(new Time( |
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tf.parse(text.trim()).getTime())); |
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break;
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default:
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value = ValueFactory.createValue(text); |
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} |
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return value;
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} |
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/**
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* DOCUMENT ME!
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*
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* @param text DOCUMENT ME!
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* @param className DOCUMENT ME!
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*
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* @return DOCUMENT ME!
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*
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* @throws SemanticException DOCUMENT ME!
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*
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* @deprecated Use createValueWithType(String, int) instead
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*/
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public static Value createValue(String text, String className) |
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throws SemanticException {
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if (className.equals("com.hardcode.gdbms.engine.values.BooleanValue")) { |
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return createValue(Boolean.getBoolean(text)); |
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} |
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if (className.equals("com.hardcode.gdbms.engine.values.DateValue")) { |
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try {
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return createValue(DateFormat.getInstance().parse(text)); |
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} catch (ParseException e) { |
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throw new SemanticException(e); |
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} |
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} |
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if (className.equals("com.hardcode.gdbms.engine.values.DoubleValue")) { |
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return createValue(Double.parseDouble(text)); |
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} |
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if (className.equals("com.hardcode.gdbms.engine.values.FloatValue")) { |
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return createValue(Float.parseFloat(text)); |
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} |
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if (className.equals("com.hardcode.gdbms.engine.values.IntValue")) { |
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return createValue(Integer.parseInt(text)); |
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} |
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if (className.equals("com.hardcode.gdbms.engine.values.LongValue")) { |
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return createValue(Long.parseLong(text)); |
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} |
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if (className.equals("com.hardcode.gdbms.engine.values.StringValue")) { |
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return createValue(text);
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} |
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|
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// default:
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throw new SemanticException( |
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"Unexpected className in createValue (GDBMS) text: " + text +
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"-> className: " + className);
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} |
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|
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/**
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* Creates a new null Value
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*
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* @return NullValue
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*/
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public static NullValue createNullValue() { |
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return new NullValue(); |
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} |
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|
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/**
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* Dado el tipo que se pasa como par?metro, expresado con una de las
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* constantes definidas en la clase java.sql.Types se devuelve la clase
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* que implementa dicho tipo
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*
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* @param type Tipo de la columna
|
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*
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* @return Clase que implementa el tipo
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*
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* @throws RuntimeException if type is not recognized
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*/
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public static Class getType(int type) { |
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switch (type) {
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case Types.NUMERIC: |
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case Types.BIGINT: |
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return LongValue.class;
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|
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case Types.BIT: |
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return BooleanValue.class;
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|
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case Types.SMALLINT: |
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return ShortValue.class;
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|
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case Types.TINYINT: |
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return ByteValue.class;
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|
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case Types.CHAR: |
426 |
case Types.VARCHAR: |
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case Types.LONGVARCHAR: |
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return StringValue.class;
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|
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case Types.DATE: |
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return DateValue.class;
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|
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case Types.FLOAT: |
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case Types.DOUBLE: |
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case Types.DECIMAL: |
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return DoubleValue.class;
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|
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case Types.INTEGER: |
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return IntValue.class;
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|
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case Types.REAL: |
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return FloatValue.class;
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|
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case Types.BINARY: |
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case Types.VARBINARY: |
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case Types.LONGVARBINARY: |
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return BinaryValue.class;
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|
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case Types.TIMESTAMP: |
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return TimestampValue.class;
|
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|
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case Types.TIME: |
453 |
return TimeValue.class;
|
454 |
|
455 |
case Types.OTHER:default: |
456 |
throw new RuntimeException("Type not recognized: " + type); |
457 |
} |
458 |
} |
459 |
|
460 |
/**
|
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* Gets a Value with the value v1 plus v2
|
462 |
*
|
463 |
* @param v1 first value
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464 |
* @param v2 second value
|
465 |
*
|
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* @return a numeric value with the operation
|
467 |
*/
|
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static NumericValue suma(NumericValue v1, NumericValue v2) {
|
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int type = Math.max(v1.getType(), v2.getType()); |
470 |
|
471 |
while (true) { |
472 |
switch (type) {
|
473 |
/*
|
474 |
* El operador '+' en java no est? definido para byte ni short, as?
|
475 |
* que nosotros tampoco lo definimos.
|
476 |
* Por otro lado no conocemos manera de detectar el overflow al operar
|
477 |
* con long's ni double's de manera eficiente, as? que no se detecta.
|
478 |
*/
|
479 |
case BYTE:
|
480 |
case SHORT:
|
481 |
case INTEGER:
|
482 |
|
483 |
int intValue = v1.intValue() + v2.intValue();
|
484 |
|
485 |
if ((intValue) != (v1.longValue() + v2.longValue())) {
|
486 |
type = LONG; |
487 |
|
488 |
continue;
|
489 |
} else {
|
490 |
return (NumericValue) createValue(intValue);
|
491 |
} |
492 |
|
493 |
case LONG:
|
494 |
return (NumericValue) createValue(v1.longValue() +
|
495 |
v2.longValue()); |
496 |
|
497 |
case FLOAT:
|
498 |
|
499 |
float floatValue = v1.floatValue() + v2.floatValue();
|
500 |
|
501 |
if ((floatValue) != (v1.doubleValue() + v2.doubleValue())) {
|
502 |
type = DOUBLE; |
503 |
|
504 |
continue;
|
505 |
} else {
|
506 |
return (NumericValue) createValue(floatValue);
|
507 |
} |
508 |
|
509 |
case DOUBLE:
|
510 |
return (NumericValue) createValue(v1.doubleValue() +
|
511 |
v2.doubleValue()); |
512 |
} |
513 |
} |
514 |
} |
515 |
|
516 |
/**
|
517 |
* Gets the value of the operation v1 v2
|
518 |
*
|
519 |
* @param v1 first value
|
520 |
* @param v2 second value
|
521 |
*
|
522 |
* @return a numeric value with the operation
|
523 |
*/
|
524 |
static NumericValue producto(NumericValue v1, NumericValue v2) {
|
525 |
int type = Math.max(v1.getType(), v2.getType()); |
526 |
|
527 |
while (true) { |
528 |
switch (type) {
|
529 |
/*
|
530 |
* El operador '+' en java no est? definido para byte ni short, as?
|
531 |
* que nosotros tampoco lo definimos.
|
532 |
* Por otro lado no conocemos manera de detectar el overflow al operar
|
533 |
* con long's ni double's de manera eficiente, as? que no se detecta.
|
534 |
*/
|
535 |
case BYTE:
|
536 |
case SHORT:
|
537 |
case INTEGER:
|
538 |
|
539 |
int intValue = v1.intValue() * v2.intValue();
|
540 |
|
541 |
if ((intValue) != (v1.intValue() * v2.intValue())) {
|
542 |
type = LONG; |
543 |
|
544 |
continue;
|
545 |
} else {
|
546 |
return (NumericValue) createValue(intValue);
|
547 |
} |
548 |
|
549 |
case LONG:
|
550 |
return (NumericValue) createValue(v1.longValue() * v2.longValue());
|
551 |
|
552 |
case FLOAT:
|
553 |
|
554 |
float floatValue = v1.floatValue() * v2.floatValue();
|
555 |
|
556 |
if ((floatValue) != (v1.doubleValue() * v2.doubleValue())) {
|
557 |
type = DOUBLE; |
558 |
|
559 |
continue;
|
560 |
} else {
|
561 |
return (NumericValue) createValue(floatValue);
|
562 |
} |
563 |
|
564 |
case DOUBLE:
|
565 |
return (NumericValue) createValue(v1.doubleValue() * v2.doubleValue());
|
566 |
} |
567 |
} |
568 |
} |
569 |
|
570 |
/**
|
571 |
* Calcula la inversa (1/v) del valor que se pasa como par?metro.
|
572 |
*
|
573 |
* @param v Valor cuya inversa se quiere obtener
|
574 |
*
|
575 |
* @return DoubleValue
|
576 |
*/
|
577 |
static NumericValue inversa(NumericValue v) {
|
578 |
int type = v.getType();
|
579 |
|
580 |
return (NumericValue) createValue(1 / v.doubleValue()); |
581 |
} |
582 |
|
583 |
/**
|
584 |
* Creates a byte array value
|
585 |
*
|
586 |
* @param bytes bytes of the value
|
587 |
*
|
588 |
* @return
|
589 |
*/
|
590 |
public static BinaryValue createValue(byte[] bytes) { |
591 |
BinaryValue ret = new BinaryValue(bytes);
|
592 |
|
593 |
return ret;
|
594 |
} |
595 |
|
596 |
/**
|
597 |
* Creates a complex value based on a xml parseable
|
598 |
* string
|
599 |
*
|
600 |
* @param string
|
601 |
*
|
602 |
* @return new instance of ComplexValue or null???
|
603 |
*/
|
604 |
public static ComplexValue createComplexValue(String string) { |
605 |
try {
|
606 |
return new ComplexValue(string); |
607 |
|
608 |
} catch (Exception e) { |
609 |
//FIXME: OJO!!! QUE HACEMOS AQUI
|
610 |
return null; |
611 |
} |
612 |
} |
613 |
|
614 |
/**
|
615 |
* Create a Value instance from a String value using
|
616 |
* the class specified in valueName.
|
617 |
* <P>
|
618 |
*
|
619 |
* <code>
|
620 |
* Nota: Habria que ver que hacemos con esto... seguimos delegando
|
621 |
* o modificar el createValueByType para que delege en esta
|
622 |
* </code>
|
623 |
* <P>
|
624 |
* @param text String representation of value
|
625 |
* @param valueName class name of the instance of Value to return.
|
626 |
* It can be the class name without the package.
|
627 |
* @return a Value instance
|
628 |
* @throws ParseException
|
629 |
*/
|
630 |
public static Value createValueByValueName(String text, String valueName) |
631 |
throws ParseException { |
632 |
String baseName;
|
633 |
if (valueName.indexOf(".") > -1) { |
634 |
baseName = valueName.substring( valueName.lastIndexOf(".")+1); |
635 |
} else {
|
636 |
baseName = valueName; |
637 |
} |
638 |
if (baseName.equals("BinaryValue")) { |
639 |
return createValueByType(text,Types.BINARY); |
640 |
} else if (baseName.equals("BooleanValue")) { |
641 |
return createValueByType(text,Types.BOOLEAN); |
642 |
} else if (baseName.equals("ByteValue")) { |
643 |
return createValueByType(text,Types.TINYINT); |
644 |
} else if (baseName.equals("ComplexValue")) { |
645 |
return createComplexValue(text);
|
646 |
} else if (baseName.equals("DateValue")) { |
647 |
return createValueByType(text,Types.DATE); |
648 |
} else if (baseName.equals("DoubleValue")) { |
649 |
return createValueByType(text,Types.DOUBLE); |
650 |
} else if (baseName.equals("FloatValue")) { |
651 |
return createValueByType(text,Types.REAL); |
652 |
} else if (baseName.equals("IntValue")) { |
653 |
return createValueByType(text,Types.INTEGER); |
654 |
} else if (baseName.equals("LongValue")) { |
655 |
return createValueByType(text,Types.BIGINT); |
656 |
} else if (baseName.equals("NullValue")) { |
657 |
return new NullValue(); |
658 |
} else if (baseName.equals("ShortValue")) { |
659 |
return createValueByType(text,Types.SMALLINT); |
660 |
} else if (baseName.equals("StringValue")) { |
661 |
return createValueByType(text,Types.VARCHAR); |
662 |
} else if (baseName.equals("TimestampValue")) { |
663 |
return createValueByType(text,Types.TIMESTAMP); |
664 |
} else if (baseName.equals("TimeValue")) { |
665 |
return createValueByType(text,Types.TIME); |
666 |
} else {
|
667 |
try {
|
668 |
Class valueClass = Class.forName(valueName); |
669 |
Constructor constr= valueClass.getConstructor(new Class[] {String.class}); |
670 |
return (Value) constr.newInstance(new Object[] {text}); |
671 |
} catch (Exception e) { |
672 |
throw new ParseException(e.getMessage(),0); |
673 |
} |
674 |
} |
675 |
} |
676 |
} |