047f59e461
git-svn-id: http://google-refine.googlecode.com/svn/trunk@27 7d457c2a-affb-35e4-300a-418c747d4874
67 lines
1.7 KiB
Java
67 lines
1.7 KiB
Java
package com.metaweb.gridworks.expr;
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import java.util.Properties;
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public class OperatorCallExpr implements Evaluable {
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final protected Evaluable[] _args;
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final protected String _op;
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public OperatorCallExpr(Evaluable[] args, String op) {
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_args = args;
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_op = op;
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}
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@Override
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public Object evaluate(Properties bindings) {
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Object[] args = new Object[_args.length];
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for (int i = 0; i < _args.length; i++) {
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args[i] = _args[i].evaluate(bindings);
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}
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if ("+".equals(_op)) {
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if (args.length == 2) {
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if (args[0] instanceof Number && args[1] instanceof Number) {
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return ((Number) args[0]).doubleValue() + ((Number) args[1]).doubleValue();
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} else {
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return args[0].toString() + args[1].toString();
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}
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}
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} else if ("-".equals(_op)) {
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if (args.length == 2) {
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if (args[0] instanceof Number && args[1] instanceof Number) {
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return ((Number) args[0]).doubleValue() - ((Number) args[1]).doubleValue();
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}
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}
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} else if ("*".equals(_op)) {
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if (args.length == 2) {
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if (args[0] instanceof Number && args[1] instanceof Number) {
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return ((Number) args[0]).doubleValue() * ((Number) args[1]).doubleValue();
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}
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}
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} else if ("/".equals(_op)) {
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if (args.length == 2) {
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if (args[0] instanceof Number && args[1] instanceof Number) {
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return ((Number) args[0]).doubleValue() / ((Number) args[1]).doubleValue();
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}
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}
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}
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return null;
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}
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@Override
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public String toString() {
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StringBuffer sb = new StringBuffer();
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for (Evaluable ev : _args) {
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if (sb.length() > 0) {
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sb.append(' ');
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sb.append(_op);
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sb.append(' ');
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}
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sb.append(ev.toString());
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}
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return sb.toString();
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}
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}
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