root / trunk / libraries / libGDBMS / src / main / java / com / hardcode / gdbms / engine / instruction / LiteralAdapter.java @ 10627
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/*
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* Created on 12-oct-2004
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*/
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package com.hardcode.gdbms.engine.instruction; |
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import com.hardcode.gdbms.engine.values.Value; |
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import com.hardcode.gdbms.engine.values.ValueFactory; |
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import com.hardcode.gdbms.parser.SimpleNode; |
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/**
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* Adaptador
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*
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* @author Fernando Gonz?lez Cort?s
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*/
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public class LiteralAdapter extends AbstractExpression { |
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/**
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* @see com.hardcode.gdbms.engine.instruction.Expression#getFieldName()
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*/
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public String getFieldName() { |
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return null; |
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} |
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/**
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* @see com.hardcode.gdbms.engine.instruction.Expression#simplify()
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*/
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public void simplify() { |
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} |
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/**
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* @see com.hardcode.gdbms.engine.instruction.CachedExpression#evaluate(long)
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*/
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public Value evaluate(long row) throws EvaluationException { |
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SimpleNode n = getEntity(); |
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try {
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return ValueFactory.createValue(Utilities.getText(n), |
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Utilities.getType(n));
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} catch (SemanticException e) {
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throw new EvaluationException(); |
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} |
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} |
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/**
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* @see com.hardcode.gdbms.engine.instruction.CachedExpression#isLiteral()
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*/
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public boolean isLiteral() { |
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return true; |
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} |
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/**
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* @see com.hardcode.gdbms.engine.instruction.Expression#calculateLiteralCondition()
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*/
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public void calculateLiteralCondition() { |
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} |
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} |