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| package org.apache.tapestry.binding; |
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| import org.apache.hivemind.Location; |
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| import org.apache.hivemind.util.Defense; |
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| import org.apache.tapestry.BindingException; |
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| import org.apache.tapestry.IBinding; |
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| import org.apache.tapestry.coerce.ValueConverter; |
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| public abstract class AbstractBinding implements IBinding |
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| { |
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| private final String _description; |
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| private final ValueConverter _valueConverter; |
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| private final Location _location; |
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1681
| protected AbstractBinding(String description, ValueConverter valueConverter, Location location)
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| { |
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| Defense.notNull(description, "description");
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| Defense.notNull(valueConverter, "valueConverter");
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| _description = description;
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| _valueConverter = valueConverter;
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| _location = location;
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| } |
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| public Location getLocation()
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| { |
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| return _location;
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| } |
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| public void setObject(Object value)
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| { |
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| throw createReadOnlyBindingException(this);
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| } |
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| public boolean isInvariant()
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| { |
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| return true;
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| } |
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| public Object getObject(Class type)
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| { |
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| Defense.notNull(type, "type");
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| Object raw = getObject();
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| try
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| { |
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| return _valueConverter.coerceValue(raw, type);
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| } |
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| catch (Exception ex) |
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| { |
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| String message = BindingMessages.convertObjectError(this, ex);
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| throw new BindingException(message, getComponent(), _location, this, ex);
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| } |
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| } |
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| public Object getComponent()
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| { |
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| return null;
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| } |
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| protected BindingException createReadOnlyBindingException(IBinding binding)
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| { |
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| return new BindingException(BindingMessages.readOnlyBinding(binding), binding);
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| } |
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| public String getDescription()
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| { |
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| return _description;
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| } |
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| public ValueConverter getValueConverter()
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| { |
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| return _valueConverter;
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| } |
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| public String toString()
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| StringBuffer buffer = new StringBuffer();
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| buffer.append(getClass().getName());
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| buffer.append("@");
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| buffer.append(Integer.toHexString(hashCode()));
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| buffer.append("[");
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| buffer.append(_description);
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| extendDescription(buffer);
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| buffer.append(", location=");
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| buffer.append(_location);
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| buffer.append("]");
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| return buffer.toString();
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| } |
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| protected void extendDescription(StringBuffer buffer)
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| { |
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| } |
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| } |