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package org.apache.tapestry.contrib.form; |
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import org.apache.hivemind.ApplicationRuntimeException; |
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import org.apache.hivemind.HiveMind; |
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import org.apache.tapestry.AbstractComponent; |
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import org.apache.tapestry.IActionListener; |
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import org.apache.tapestry.IForm; |
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import org.apache.tapestry.IMarkupWriter; |
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import org.apache.tapestry.IRequestCycle; |
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import org.apache.tapestry.Tapestry; |
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import org.apache.tapestry.TapestryUtils; |
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import org.apache.tapestry.form.IFormComponent; |
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import org.apache.tapestry.listener.ListenerInvoker; |
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import org.apache.tapestry.services.DataSqueezer; |
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public abstract class FormConditional extends AbstractComponent implements |
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IFormComponent |
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{ |
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protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) |
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{ |
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IForm form = TapestryUtils.getForm(cycle, this); |
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boolean cycleRewinding = cycle.isRewinding(); |
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if (cycleRewinding && !form.isRewinding()) return; |
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String name = form.getElementId(this); |
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boolean condition = getCondition(cycle, form, name); |
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getListenerInvoker().invokeListener(getListener(), this, cycle); |
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if (condition) |
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{ |
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String element = getElement(); |
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boolean render = !cycleRewinding && HiveMind.isNonBlank(element); |
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if (render) |
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{ |
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writer.begin(element); |
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renderInformalParameters(writer, cycle); |
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} |
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renderBody(writer, cycle); |
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if (render) writer.end(element); |
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} |
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} |
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private boolean getCondition(IRequestCycle cycle, IForm form, String name) |
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{ |
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boolean condition; |
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if (!cycle.isRewinding()) |
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{ |
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condition = getCondition(); |
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writeValue(form, name, condition); |
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} |
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else |
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{ |
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String submittedCondition = cycle.getParameter(name); |
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condition = convertValue(submittedCondition); |
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} |
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if (isParameterBound("conditionValue")) setConditionValue(condition); |
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return condition; |
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} |
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private void writeValue(IForm form, String name, boolean value) |
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{ |
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String externalValue; |
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try |
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{ |
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externalValue = getDataSqueezer().squeeze( |
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value ? Boolean.TRUE : Boolean.FALSE); |
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} |
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catch (Exception ex) |
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{ |
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throw new ApplicationRuntimeException(Tapestry.format( |
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"FormConditional.unable-to-convert-value", Boolean |
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.toString(value)), this, null, ex); |
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} |
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form.addHiddenValue(name, externalValue); |
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} |
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private boolean convertValue(String value) |
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{ |
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try |
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{ |
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Boolean b = (Boolean) getDataSqueezer().unsqueeze(value); |
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return b.booleanValue(); |
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} |
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catch (Exception ex) |
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{ |
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throw new ApplicationRuntimeException(Tapestry.format( |
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"FormConditional.unable-to-convert-string", value), this, |
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null, ex); |
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} |
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} |
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public abstract DataSqueezer getDataSqueezer(); |
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public boolean isDisabled() |
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{ |
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return false; |
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} |
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public abstract boolean getCondition(); |
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public abstract void setConditionValue(boolean value); |
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public abstract String getElement(); |
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public abstract IActionListener getListener(); |
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public abstract ListenerInvoker getListenerInvoker(); |
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} |