/*
* Copyright (C) 2013 salesforce.com, inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
*/
package org.auraframework.impl.root.component;
import java.util.List;
import java.util.Map;
import org.auraframework.Aura;
import org.auraframework.def.ComponentConfigProvider;
import org.auraframework.instance.AttributeSet;
import org.auraframework.instance.BaseComponent;
import org.auraframework.instance.Component;
import org.auraframework.instance.ComponentConfig;
import org.auraframework.instance.InstanceStack;
import org.auraframework.system.Annotations.Provider;
import org.auraframework.system.AuraContext;
import org.auraframework.throwable.quickfix.QuickFixException;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
/**
* guts of the iteration component. dynamically instantiates the components in
* its body based on the attributes passed into it
*
*
* @since 0.0.234
*/
@Provider
public class IterationProvider implements ComponentConfigProvider {
@Override
public ComponentConfig provide() throws QuickFixException {
AuraContext context = Aura.getContextService().getCurrentContext();
BaseComponent<?, ?> component = context.getCurrentComponent();
ComponentConfig cc = new ComponentConfig();
List<Component> components = Lists.newArrayList();
InstanceStack iStack = context.getInstanceStack();
Map<String, Object> m = Maps.newHashMapWithExpectedSize(1);
m.put("body", components);
cc.setAttributes(m);
AttributeSet atts = component.getAttributes();
Iterable<?> value = atts.getValue("items", Iterable.class);
if (value != null) {
List<?> items = Lists.newArrayList(value);
if (!items.isEmpty()) {
String var = atts.getValue("var", String.class);
String indexVar = atts.getValue("indexVar", String.class);
int realstart = 0;
int realend = items.size();
ComponentDefRefArrayImpl template = atts.getValue("body", ComponentDefRefArrayImpl.class);
m.put("template",template);
Integer start = getIntValue(atts.getValue("start"));
Integer end = getIntValue(atts.getValue("end"));
if (start == null && end == null) {
// int page = (Integer)atts.getValue("page");
// int pageSize = (Integer)atts.getValue("pageSize");
} else {
if (start != null && start > realstart) {
realstart = start;
}
if (end != null && end < realend) {
realend = end;
}
}
// boolean reverse = (Boolean)atts.getValue("reverse");
iStack.setAttributeName("body");
for (int i = realstart; i < realend; i++) {
iStack.setAttributeIndex(i);
iStack.pushInstance(component, component.getDescriptor());
iStack.setAttributeName("body");
Map<String, Object> providers = Maps.newHashMap();
providers.put(var, items.get(i));
if (indexVar != null) {
providers.put(indexVar, i);
}
components.addAll(template.newInstance(atts.getValueProvider(), providers));
iStack.clearAttributeName("body");
iStack.popInstance(component);
iStack.clearAttributeIndex(i);
}
iStack.clearAttributeName("body");
}
}
return cc;
}
private Integer getIntValue(Object val) {
if (val == null) {
return null;
}
if (val instanceof String) {
return (int) Double.parseDouble((String) val);
}
return ((Number) val).intValue();
}
}