Revision 45739 trunk/org.gvsig.desktop/org.gvsig.desktop.library/org.gvsig.expressionevaluator/org.gvsig.expressionevaluator.lib/org.gvsig.expressionevaluator.lib.impl/src/main/java/org/gvsig/expressionevaluator/impl/function/typeconversion/ToStrFunction.java
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package org.gvsig.expressionevaluator.impl.function.typeconversion; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.logging.Level; |
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import java.util.logging.Logger; |
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import org.apache.commons.lang3.Range; |
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import org.apache.commons.lang3.StringUtils; |
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import static org.gvsig.expressionevaluator.ExpressionBuilder.FUNCTION_TOSTR; |
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import org.gvsig.expressionevaluator.Interpreter; |
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import org.gvsig.expressionevaluator.spi.AbstractFunction; |
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import org.gvsig.tools.ToolsLocator; |
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import org.gvsig.tools.dataTypes.DataTypes; |
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import org.gvsig.tools.dataTypes.Coercion; |
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import org.gvsig.tools.dataTypes.CoercionException; |
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import org.gvsig.tools.util.GetItem; |
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import org.gvsig.tools.util.Size; |
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public class ToStrFunction extends AbstractFunction {
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@SuppressWarnings("OverridableMethodCallInConstructor")
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public ToStrFunction() {
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super(GROUP_CONVERSION, FUNCTION_TOSTR, Range.is(1)); |
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this.addAlias("STR");
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| ... | ... | |
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@Override |
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public Object call(Interpreter interpreter, Object[] args) throws Exception {
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Object obj = this.getObject(args, 0); |
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StringBuilder builder = new StringBuilder(); |
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join(builder, obj, ", "); |
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return builder.toString(); |
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} |
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private void join(StringBuilder builder, Object obj, String separator) {
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Coercion toStr = ToolsLocator.getDataTypesManager().getCoercion(DataTypes.STRING); |
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Object value = toStr.coerce(this.getObject(args, 0)); |
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return value; |
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if( obj instanceof Iterable ) {
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builder.append("[");
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join(builder, ((Iterable) obj).iterator(), separator); |
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builder.append("]");
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} else if( obj instanceof GetItem && obj instanceof Size ) {
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Iterator it = new Iterator() {
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int i=0; |
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@Override |
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public boolean hasNext() {
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return i<((Size)obj).size(); |
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} |
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@Override |
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public Object next() {
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return ((GetItem)obj).get(i++); |
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} |
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}; |
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builder.append("[");
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join(builder, ((Iterable) obj).iterator(), separator); |
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builder.append("]");
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} else {
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try {
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Object value = toStr.coerce(obj); |
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builder.append(value); |
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} catch (CoercionException ex) {
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builder.append(obj); |
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} |
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} |
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} |
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private void join(StringBuilder builder, Iterator it, String separator) {
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boolean needseparator = false; |
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while( it.hasNext() ) {
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if( needseparator ) {
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builder.append(separator); |
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} else {
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needseparator = true; |
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} |
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Object item = it.next(); |
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join(builder, item, separator); |
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} |
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} |
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} |
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