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package org.apache.tapestry.form; |
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import org.apache.hivemind.ApplicationRuntimeException; |
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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.valid.ValidatorException; |
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import java.util.HashSet; |
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import java.util.Set; |
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39 | 0 | public abstract class Select extends AbstractFormComponent implements ValidatableField |
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{ |
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private static final String ATTRIBUTE_NAME = "org.apache.tapestry.active.Select"; |
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private boolean _rewinding; |
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private boolean _rendering; |
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private Set _selections; |
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private int _nextOptionId; |
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public static Select get(IRequestCycle cycle) |
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{ |
59 | 0 | return (Select) cycle.getAttribute(ATTRIBUTE_NAME); |
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} |
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public abstract boolean isMultiple(); |
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public boolean isRewinding() |
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{ |
66 | 0 | if (!_rendering) |
67 | 0 | throw Tapestry.createRenderOnlyPropertyException(this, "rewinding"); |
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69 | 0 | return _rewinding; |
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} |
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public String getNextOptionId() |
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{ |
74 | 0 | if (!_rendering) |
75 | 0 | throw Tapestry.createRenderOnlyPropertyException(this, "nextOptionId"); |
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79 | 0 | return Integer.toString(_nextOptionId++); |
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} |
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public boolean isSelected(String value) |
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{ |
84 | 0 | if (_selections == null) |
85 | 0 | return false; |
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87 | 0 | return _selections.contains(value); |
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} |
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protected void prepareForRender(IRequestCycle cycle) |
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{ |
95 | 0 | super.prepareForRender(cycle); |
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97 | 0 | if (cycle.getAttribute(ATTRIBUTE_NAME) != null) |
98 | 0 | throw new ApplicationRuntimeException(Tapestry.getMessage("Select.may-not-nest"), this, null, null); |
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100 | 0 | cycle.setAttribute(ATTRIBUTE_NAME, this); |
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102 | 0 | _rendering = true; |
103 | 0 | _nextOptionId = 0; |
104 | 0 | } |
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protected void cleanupAfterRender(IRequestCycle cycle) |
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{ |
111 | 0 | super.cleanupAfterRender(cycle); |
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113 | 0 | _rendering = false; |
114 | 0 | _selections = null; |
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116 | 0 | cycle.removeAttribute(ATTRIBUTE_NAME); |
117 | 0 | } |
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protected void renderFormComponent(IMarkupWriter writer, IRequestCycle cycle) |
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{ |
124 | 0 | _rewinding = false; |
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126 | 0 | renderDelegatePrefix(writer, cycle); |
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128 | 0 | writer.begin("select"); |
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130 | 0 | writer.attribute("name", getName()); |
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132 | 0 | if (isMultiple()) |
133 | 0 | writer.attribute("multiple", "multiple"); |
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135 | 0 | if (isDisabled()) |
136 | 0 | writer.attribute("disabled", "disabled"); |
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138 | 0 | renderIdAttribute(writer, cycle); |
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140 | 0 | renderDelegateAttributes(writer, cycle); |
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142 | 0 | getValidatableFieldSupport().renderContributions(this, writer, cycle); |
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144 | 0 | renderInformalParameters(writer, cycle); |
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146 | 0 | renderBody(writer, cycle); |
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148 | 0 | writer.end(); |
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150 | 0 | renderDelegateSuffix(writer, cycle); |
151 | 0 | } |
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protected void rewindFormComponent(IMarkupWriter writer, IRequestCycle cycle) |
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{ |
158 | 0 | _selections = null; |
159 | 0 | _rewinding = true; |
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161 | 0 | String[] parameters = cycle.getParameters(getName()); |
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try |
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{ |
165 | 0 | if (parameters != null) |
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{ |
167 | 0 | int length = parameters.length; |
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169 | 0 | _selections = new HashSet((length > 30) ? 101 : 7); |
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171 | 0 | for (int i = 0; i < length; i++) |
172 | 0 | _selections.add(parameters[i]); |
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} |
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175 | 0 | renderBody(writer, cycle); |
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178 | 0 | getValidatableFieldSupport().validate(this, writer, cycle, parameters); |
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} |
180 | 0 | catch (ValidatorException e) |
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{ |
182 | 0 | getForm().getDelegate().record(e); |
183 | 0 | } |
184 | 0 | } |
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public abstract ValidatableFieldSupport getValidatableFieldSupport(); |
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public boolean isRequired() |
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{ |
196 | 0 | return getValidatableFieldSupport().isRequired(this); |
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} |
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} |