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package org.trails.component; |
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import java.util.ArrayList; |
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import java.util.List; |
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import org.apache.tapestry.form.IPropertySelectionModel; |
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import org.trails.TrailsRuntimeException; |
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import ognl.Ognl; |
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public abstract class AbstractPropertySelectionModel implements IPropertySelectionModel |
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{ |
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protected List instances; |
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protected boolean allowNone; |
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protected String labelProperty = "toString()"; |
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public static final String DEFAULT_NONE_LABEL = "None"; |
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public static final String DEFAULT_NONE_VALUE = "none"; |
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protected String noneLabel = DEFAULT_NONE_LABEL; |
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public AbstractPropertySelectionModel(List instances) |
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{ |
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this(instances, false); |
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} |
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public AbstractPropertySelectionModel(List instances, boolean allowNone) |
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{ |
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this.allowNone = allowNone; |
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this.instances = new ArrayList(); |
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this.instances.addAll(instances); |
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if (this.allowNone) |
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{ |
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this.instances.add(0, null); |
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} |
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} |
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public String getNoneLabel() |
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{ |
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return noneLabel; |
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} |
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public void setNoneLabel(String noneLabel) |
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{ |
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this.noneLabel = noneLabel; |
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} |
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public String getLabelProperty() |
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{ |
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return labelProperty; |
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} |
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public void setLabelProperty(String labelProperty) |
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{ |
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this.labelProperty = labelProperty; |
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} |
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public int getOptionCount() |
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{ |
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return instances.size(); |
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} |
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public Object getOption(int index) |
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{ |
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return instances.get(index); |
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} |
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public String getLabel(int index) |
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{ |
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if (allowNone && index == 0) |
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return getNoneLabel(); |
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} |
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try |
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return Ognl.getValue(labelProperty, instances.get(index)).toString(); |
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} catch (Exception e) |
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{ |
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throw new TrailsRuntimeException(e); |
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} |
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} |
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public boolean isDisabled(int i) |
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{ |
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return false; |
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} |
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} |