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package com.google.gwt.gen2.table.client.property; |
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import com.google.gwt.gen2.table.client.property.ColumnProperty.Type; |
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import java.util.*; |
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import java.util.HashMap; |
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import java.util.Map; |
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import com.google.gwt.gen2.table.client.property.ColumnProperty.*; |
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/** |
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* Manager responsible for adding, retrieving, and removing |
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* {@link ColumnProperty}. |
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*/ |
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public class ColumnPropertyManager { |
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/** |
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* A map of property types to their associated properties. |
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*/ |
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private Map<Type<?>, ColumnProperty> properties = new HashMap<Type<?>, ColumnProperty>(); |
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/** |
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* <p> |
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* Get the {@link ColumnProperty} associated with the specified |
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* {@link ColumnProperty.Type}. If the property is not defined, the default |
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* value will be returned. |
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* </p> |
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* <p> |
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* This method should never return null. Instead, it should return the default |
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* property from {@link ColumnProperty.Type#getDefault()}. |
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* </p> |
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* |
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* @param <P> the column property type |
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* @param type the {@link ColumnProperty} type |
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* @return the property, or the default value if the property is not defined |
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*/ |
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public <P extends ColumnProperty> P getColumnProperty( |
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ColumnProperty.Type<P> type) { |
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return getColumnProperty(type, true); |
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} |
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/** |
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* Get the {@link ColumnProperty} associated with the specified |
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* {@link ColumnProperty.Type}. |
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* |
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* @param <P> the column property type |
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* @param type the {@link ColumnProperty} type |
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* @param useDefault if true, return the default property instead of null |
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* @return the property, or the default value if the property is not defined |
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*/ |
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@SuppressWarnings("unchecked") |
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public <P extends ColumnProperty> P getColumnProperty( |
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ColumnProperty.Type<P> type, boolean useDefault) { |
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Object property = properties.get(type); |
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if (property == null && useDefault) { |
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return type.getDefault(); |
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public class ColumnPropertyManager |
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{ |
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/** |
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* A map of property types to their associated properties. |
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*/ |
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private Map<Type<?>, ColumnProperty> properties = new HashMap<Type<?>, ColumnProperty>(); |
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/** |
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* <p> |
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* Get the {@link ColumnProperty} associated with the specified |
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* {@link ColumnProperty.Type}. If the property is not defined, the default |
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* value will be returned. |
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* </p> |
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* <p> |
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* This method should never return null. Instead, it should return the default |
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* property from {@link ColumnProperty.Type#getDefault()}. |
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* </p> |
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* |
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* @param <P> the column property type |
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* @param type the {@link ColumnProperty} type |
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* |
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* @return the property, or the default value if the property is not defined |
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*/ |
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public <P extends ColumnProperty> P getColumnProperty( ColumnProperty.Type<P> type ) |
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{ |
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return getColumnProperty( type, true ); |
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} |
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return (P) property; |
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} |
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/** |
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* Remove an existing {@link ColumnProperty} if it has already been added. |
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* |
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* @param type the type of the property to remove |
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* @return the removed property, or null if one was never set |
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*/ |
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@SuppressWarnings("unchecked") |
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public <P extends ColumnProperty> P removeColumnProperty( |
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ColumnProperty.Type<P> type) { |
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Object property = properties.remove(type); |
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if (property == null) { |
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return null; |
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/** |
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* Get the {@link ColumnProperty} associated with the specified |
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* {@link ColumnProperty.Type}. |
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* |
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* @param <P> the column property type |
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* @param type the {@link ColumnProperty} type |
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* @param useDefault if true, return the default property instead of null |
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* |
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* @return the property, or the default value if the property is not defined |
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*/ |
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@SuppressWarnings("unchecked") |
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public <P extends ColumnProperty> P getColumnProperty( ColumnProperty.Type<P> type, boolean useDefault ) |
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{ |
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Object property = properties.get( type ); |
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if ( property == null && useDefault ) |
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{ |
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return type.getDefault(); |
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} |
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return (P) property; |
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} |
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return (P) property; |
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} |
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/** |
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* Set a {@link ColumnProperty}. |
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* |
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* @param <P> the column property type |
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* @param type the {@link ColumnProperty} type |
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* @param property the property to set |
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*/ |
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public <P extends ColumnProperty> void setColumnProperty( |
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ColumnProperty.Type<P> type, P property) { |
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assert type != null : "Cannot add a property with a null type"; |
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assert property != null : "Cannot add a null property"; |
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properties.put(type, property); |
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} |
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/** |
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* Remove an existing {@link ColumnProperty} if it has already been added. |
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* |
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* @param type the type of the property to remove |
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* |
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* @return the removed property, or null if one was never set |
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*/ |
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@SuppressWarnings("unchecked") |
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public <P extends ColumnProperty> P removeColumnProperty( ColumnProperty.Type<P> type ) |
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{ |
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Object property = properties.remove( type ); |
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if ( property == null ) |
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{ |
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return null; |
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} |
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return (P) property; |
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} |
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/** |
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* Set a {@link ColumnProperty}. |
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* |
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* @param <P> the column property type |
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* @param type the {@link ColumnProperty} type |
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* @param property the property to set |
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*/ |
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public <P extends ColumnProperty> void setColumnProperty( ColumnProperty.Type<P> type, P property ) |
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{ |
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assert type != null : "Cannot add a property with a null type"; |
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assert property != null : "Cannot add a null property"; |
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properties.put( type, property ); |
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} |
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} |