[seam-issues] [JBoss JIRA] Updated: (SEAMFACES-141) Create a converter for dealing with lists

[ https://issues.jboss.org/browse/SEAMFACES-141?page=com.atlassian.jira.plu... ] Brian Leathem updated SEAMFACES-141: ------------------------------------ Description: A converter is required to serialize an object into the query string for use as a view param. If that object is a list, it would be helpful to make use of an existing converter that converts each individual entry, and has the cumulative result serialized as a string. The standard CGI syntax represents arrays as multiple values, each with the same key. This may already be supported in JSF, but at the time of writing this, I couldn't find it. Possible implementation (not conformant with the above mentioned CDI standard syntax): {code} abstract public class ListConverter<T> implements Converter { private final Converter converter; private final String SEPERATOR_CHAR=":"; public ListConverter(Converter converter) { this.converter = converter; } @Override public Object getAsObject(FacesContext context, UIComponent component, String value) { List<T> newList = new ArrayList<T>(); if (value == null || value.isEmpty()) { return newList; } String[] chunkArray; if (value.startsWith("[")) { String chunks = value.substring(1, value.length()-1); chunkArray = chunks.split(SEPERATOR_CHAR); } else { chunkArray = new String[] {value}; } for (String chunk : chunkArray) { try { Object object = converter.getAsObject(context, component, chunk); newList.add((T) object); } catch (IllegalArgumentException e) { FacesMessage facesMessage = new FacesMessage(FacesMessage.SEVERITY_ERROR, String.format("%s is not a valid search term",value), null); context.addMessage(null, facesMessage); } } return newList; } @Override public String getAsString(FacesContext context, UIComponent component, Object value) { if (value instanceof List) { List<T> conversionList = (List<T>) value; if (conversionList.isEmpty()) { return ""; } StringBuilder sb = new StringBuilder(); sb.append("["); for (int i=0; i < conversionList.size(); i++ ) { String string = converter.getAsString(context, component, conversionList.get(i)); sb.append(string); if (i < conversionList.size() -1) { sb.append(SEPERATOR_CHAR); } } sb.append("]"); return sb.toString(); } else { throw new IllegalArgumentException(String.format("Cannot convert object of class %s", value.getClass().getName())); } } } {code} was: A converter is required to serialize an object into the query string for use as a view param. If that object is a list, it would be helpful to make use of an existing converter that converts each individual entry, and has the cumulative result serialized as a string. The standard CGI syntax represents arrays as multiple values, each with the same key. This may already be supported in JSF, but at the time of writing this, I couldn't find it. Possible implementation (not conformant with the above mentioned CDI standard syntax: {code} abstract public class ListConverter<T> implements Converter { private final Converter converter; private final String SEPERATOR_CHAR=":"; public ListConverter(Converter converter) { this.converter = converter; } @Override public Object getAsObject(FacesContext context, UIComponent component, String value) { List<T> newList = new ArrayList<T>(); if (value == null || value.isEmpty()) { return newList; } String[] chunkArray; if (value.startsWith("[")) { String chunks = value.substring(1, value.length()-1); chunkArray = chunks.split(SEPERATOR_CHAR); } else { chunkArray = new String[] {value}; } for (String chunk : chunkArray) { try { Object object = converter.getAsObject(context, component, chunk); newList.add((T) object); } catch (IllegalArgumentException e) { FacesMessage facesMessage = new FacesMessage(FacesMessage.SEVERITY_ERROR, String.format("%s is not a valid search term",value), null); context.addMessage(null, facesMessage); } } return newList; } @Override public String getAsString(FacesContext context, UIComponent component, Object value) { if (value instanceof List) { List<T> conversionList = (List<T>) value; if (conversionList.isEmpty()) { return ""; } StringBuilder sb = new StringBuilder(); sb.append("["); for (int i=0; i < conversionList.size(); i++ ) { String string = converter.getAsString(context, component, conversionList.get(i)); sb.append(string); if (i < conversionList.size() -1) { sb.append(SEPERATOR_CHAR); } } sb.append("]"); return sb.toString(); } else { throw new IllegalArgumentException(String.format("Cannot convert object of class %s", value.getClass().getName())); } } } {code} -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira