| package freemarker.ext.beans; |
| |
| import java.util.AbstractMap; |
| import java.util.AbstractSet; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import freemarker.template.TemplateHashModel; |
| import freemarker.template.TemplateHashModelEx; |
| import freemarker.template.TemplateModel; |
| import freemarker.template.TemplateModelAdapter; |
| import freemarker.template.TemplateModelException; |
| import freemarker.template.TemplateModelIterator; |
| import freemarker.template.utility.UndeclaredThrowableException; |
| |
| /** |
| * @author Attila Szegedi |
| */ |
| public class HashAdapter extends AbstractMap implements TemplateModelAdapter { |
| private final BeansWrapper wrapper; |
| private final TemplateHashModel model; |
| private Set entrySet; |
| |
| HashAdapter(TemplateHashModel model, BeansWrapper wrapper) { |
| this.model = model; |
| this.wrapper = wrapper; |
| } |
| |
| public TemplateModel getTemplateModel() { |
| return model; |
| } |
| |
| public boolean isEmpty() { |
| try { |
| return model.isEmpty(); |
| } |
| catch(TemplateModelException e) { |
| throw new UndeclaredThrowableException(e); |
| } |
| } |
| |
| public Object get(Object key) { |
| try { |
| return wrapper.unwrap(model.get(String.valueOf(key))); |
| } |
| catch(TemplateModelException e) { |
| throw new UndeclaredThrowableException(e); |
| } |
| } |
| |
| public boolean containsKey(Object key) { |
| // A quick check that doesn't require TemplateHashModelEx |
| if(get(key) != null) { |
| return true; |
| } |
| return super.containsKey(key); |
| } |
| |
| public Set entrySet() { |
| if(entrySet != null) { |
| return entrySet; |
| } |
| return entrySet = new AbstractSet() { |
| public Iterator iterator() { |
| final TemplateModelIterator i; |
| try { |
| i = getModelEx().keys().iterator(); |
| } |
| catch(TemplateModelException e) { |
| throw new UndeclaredThrowableException(e); |
| } |
| return new Iterator() { |
| public boolean hasNext() { |
| try { |
| return i.hasNext(); |
| } |
| catch(TemplateModelException e) { |
| throw new UndeclaredThrowableException(e); |
| } |
| } |
| |
| public Object next() { |
| final Object key; |
| try { |
| key = wrapper.unwrap(i.next()); |
| } |
| catch(TemplateModelException e) { |
| throw new UndeclaredThrowableException(e); |
| } |
| return new Map.Entry() { |
| public Object getKey() { |
| return key; |
| } |
| |
| public Object getValue() { |
| return get(key); |
| } |
| |
| public Object setValue(Object value) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public boolean equals(Object o) { |
| if (!(o instanceof Map.Entry)) |
| return false; |
| Map.Entry e = (Map.Entry)o; |
| Object k1 = getKey(); |
| Object k2 = e.getKey(); |
| if (k1 == k2 || (k1 != null && k1.equals(k2))) { |
| Object v1 = getValue(); |
| Object v2 = e.getValue(); |
| if (v1 == v2 || (v1 != null && v1.equals(v2))) |
| return true; |
| } |
| return false; |
| } |
| |
| public int hashCode() { |
| Object value = getValue(); |
| return (key==null ? 0 : key.hashCode()) ^ |
| (value==null ? 0 : value.hashCode()); |
| } |
| }; |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| }; |
| } |
| |
| public int size() { |
| try { |
| return getModelEx().size(); |
| } |
| catch(TemplateModelException e) { |
| throw new UndeclaredThrowableException(e); |
| } |
| } |
| }; |
| } |
| |
| private TemplateHashModelEx getModelEx() { |
| if(model instanceof TemplateHashModelEx) { |
| return ((TemplateHashModelEx)model); |
| } |
| throw new UnsupportedOperationException( |
| "Operation supported only on TemplateHashModelEx. " + |
| model.getClass().getName() + " does not implement it though."); |
| } |
| |
| } |