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20 package org.apache.myfaces.tobago.internal.renderkit.renderer;
21
22 import org.apache.myfaces.tobago.internal.component.AbstractUIInput;
23 import org.apache.myfaces.tobago.internal.component.AbstractUISuggest;
24 import org.apache.myfaces.tobago.internal.util.JsonUtils;
25 import org.apache.myfaces.tobago.internal.util.SelectItemUtils;
26 import org.apache.myfaces.tobago.model.AutoSuggestItem;
27 import org.apache.myfaces.tobago.model.AutoSuggestItems;
28 import org.apache.myfaces.tobago.renderkit.RendererBase;
29 import org.apache.myfaces.tobago.renderkit.html.CustomAttributes;
30 import org.apache.myfaces.tobago.renderkit.html.HtmlAttributes;
31 import org.apache.myfaces.tobago.renderkit.html.HtmlElements;
32 import org.apache.myfaces.tobago.renderkit.html.HtmlInputTypes;
33 import org.apache.myfaces.tobago.util.ComponentUtils;
34 import org.apache.myfaces.tobago.webapp.TobagoResponseWriter;
35 import org.slf4j.Logger;
36 import org.slf4j.LoggerFactory;
37
38 import javax.el.MethodExpression;
39 import javax.faces.context.FacesContext;
40 import javax.faces.model.SelectItem;
41 import java.io.IOException;
42 import java.lang.invoke.MethodHandles;
43 import java.util.ArrayList;
44 import java.util.Collections;
45 import java.util.List;
46 import java.util.Map;
47
48 public class SuggestRenderer<T extends AbstractUISuggest> extends RendererBase<T> {
49
50 private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
51
52 @Override
53 public void decodeInternal(final FacesContext facesContext, final T component) {
54 final String clientId = component.getClientId(facesContext);
55 final Map<String, String> requestParameterMap = facesContext.getExternalContext().getRequestParameterMap();
56 if (requestParameterMap.containsKey(clientId)) {
57 final String query = requestParameterMap.get(clientId);
58 if (LOG.isDebugEnabled()) {
59 LOG.debug("suggest query='{}'", query);
60 }
61
62 final AbstractUIInput input = ComponentUtils.findAncestor(component, AbstractUIInput.class);
63 if (input != null) {
64 input.setSubmittedValue(query);
65 }
66
67 component.setQuery(query);
68 }
69 }
70
71 @Override
72 public void encodeBeginInternal(final FacesContext facesContext, final T component) throws IOException {
73 final AbstractUIInput input = ComponentUtils.findAncestor(component, AbstractUIInput.class);
74 final MethodExpression suggestMethodExpression = component.getSuggestMethodExpression();
75
76 int totalCount = component.getTotalCount();
77 final String[] array;
78
79 if (suggestMethodExpression != null && input != null) {
80 final AutoSuggestItems autoSuggestItems
81 = createAutoSuggestItems(suggestMethodExpression.invoke(facesContext.getELContext(), new Object[]{input}));
82 final List<AutoSuggestItem> items = autoSuggestItems.getItems();
83
84 if (totalCount == -1 || items.size() < totalCount) {
85 totalCount = items.size();
86 }
87
88 array = new String[totalCount];
89 for (int i = 0; i < totalCount; i++) {
90 array[i] = items.get(i).getLabel();
91 }
92 } else {
93 final List<SelectItem> items = SelectItemUtils.getItemList(facesContext, component);
94
95 if (totalCount == -1 || items.size() < totalCount) {
96 totalCount = items.size();
97 }
98
99 array = new String[totalCount];
100 for (int i = 0; i < totalCount; i++) {
101 array[i] = items.get(i).getLabel();
102 }
103 }
104
105 final TobagoResponseWriter writer = getResponseWriter(facesContext);
106
107 writer.startElement(HtmlElements.TOBAGO_SUGGEST);
108 final String clientId = component.getClientId(facesContext);
109 writer.writeIdAttribute(clientId);
110 if (input != null) {
111 writer.writeAttribute(HtmlAttributes.FOR, input.getFieldId(facesContext), false);
112 } else {
113 LOG.error("No ancestor with type AbstractUIInput found for suggest id={}", clientId);
114 }
115
116 writer.writeAttribute(CustomAttributes.MIN_CHARS, component.getMinimumCharacters());
117 writer.writeAttribute(CustomAttributes.DELAY, component.getDelay());
118 writer.writeAttribute(CustomAttributes.MAX_ITEMS, component.getMaximumItems());
119 writer.writeAttribute(CustomAttributes.UPDATE, component.isUpdate());
120 writer.writeAttribute(CustomAttributes.TOTAL_COUNT, totalCount);
121 writer.writeAttribute(CustomAttributes.LOCAL_MENU, component.isLocalMenu());
122 writer.writeAttribute(CustomAttributes.ITEMS, JsonUtils.encode(array), true);
123
124 if (LOG.isDebugEnabled()) {
125 LOG.debug("suggest list: {}", JsonUtils.encode(array));
126 }
127
128 writer.startElement(HtmlElements.INPUT);
129 writer.writeAttribute(HtmlAttributes.TYPE, HtmlInputTypes.HIDDEN);
130 writer.writeAttribute(HtmlAttributes.NAME, clientId, false);
131 writer.endElement(HtmlElements.INPUT);
132
133 writer.endElement(HtmlElements.TOBAGO_SUGGEST);
134 }
135
136 private AutoSuggestItems createAutoSuggestItems(final Object object) {
137 if (object instanceof AutoSuggestItems) {
138 return (AutoSuggestItems) object;
139 }
140 final AutoSuggestItems autoSuggestItems = new AutoSuggestItems();
141 if (object instanceof List && !((List) object).isEmpty()) {
142 if (((List) object).get(0) instanceof AutoSuggestItem) {
143
144 autoSuggestItems.setItems((List<AutoSuggestItem>) object);
145 } else if (((List) object).get(0) instanceof String) {
146 final List<AutoSuggestItem> items = new ArrayList<>(((List) object).size());
147 for (int i = 0; i < ((List) object).size(); i++) {
148 final AutoSuggestItem item = new AutoSuggestItem();
149 item.setLabel((String) ((List) object).get(i));
150 item.setValue((String) ((List) object).get(i));
151 items.add(item);
152 }
153 autoSuggestItems.setItems(items);
154 } else {
155 throw new ClassCastException("Can't create AutoSuggestItems from '" + object + "'. "
156 + "Elements needs to be " + String.class.getName() + " or " + AutoSuggestItem.class.getName());
157 }
158 } else {
159 autoSuggestItems.setItems(Collections.emptyList());
160 }
161 return autoSuggestItems;
162 }
163
164 }