/Users/nah/Documents/code/cast/src/java/cast/core/CASTComponentPermissionsMap.java

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package cast.core;

import java.util.Hashtable;

import cast.cdl.WorkingMemoryPermissions;


public class CASTComponentPermissionsMap {

        
        private static class PermAndCheck extends Pair<WorkingMemoryPermissions, Boolean> {
                PermAndCheck(WorkingMemoryPermissions _a, boolean _b) {
                        super(_a, _b);
                }
        }
        
        private final Hashtable<String, PermAndCheck> m_localPermissions;
        private final Hashtable<String, Hashtable<String, PermAndCheck>> m_globalPermissions;
        
        public CASTComponentPermissionsMap(String _subarch) {
                //keep local permissions separate for ease
                m_localPermissions = new Hashtable<String, PermAndCheck>();
                m_globalPermissions = new Hashtable<String, Hashtable<String,PermAndCheck>>();
                //store local permissions in global map for generality
                m_globalPermissions.put(_subarch, m_localPermissions);
        }       
        
        public WorkingMemoryPermissions setPermissions(String _id, WorkingMemoryPermissions _permissions) {
                PermAndCheck check =  m_localPermissions.put(_id, new PermAndCheck(_permissions,true));
                if(check == null) {
                        return null;
                }
                else {
                        return check.m_first;
                }
        }
        
        public WorkingMemoryPermissions setPermissions(String _id, String _subarch, WorkingMemoryPermissions _permissions) {
                if(!m_globalPermissions.containsKey(_subarch)) {
                        m_globalPermissions.put(_subarch, new Hashtable<String, PermAndCheck>());
                }
                PermAndCheck check = m_globalPermissions.get(_subarch).put(_id, new PermAndCheck(_permissions,true));
                
                if(check == null) {
                        return null;
                }
                else {
                        return check.m_first;
                }
        }

        public WorkingMemoryPermissions getPermissions(String _id) {
                return m_localPermissions.get(_id).m_first;
        }
        
        public WorkingMemoryPermissions getPermissions(String _id, String _subarch) {
                if(!m_globalPermissions.containsKey(_subarch)) {
                        return null;
                }
                PermAndCheck check = m_globalPermissions.get(_subarch).get(_id);
                if(check == null) {
                        return null;
                }
                else {
                        return check.m_first;
                }
                
        }

        public boolean hasPermissions(String _id) {
                return getPermissions(_id) != null;
        }
        
        public boolean hasPermissions(String _id, String _subarch) {
                return getPermissions(_id, _subarch) != null;
        }

        public WorkingMemoryPermissions removePermissions(String _id) {
                return m_localPermissions.remove(_id).m_first;
        }
        
        public WorkingMemoryPermissions removePermissions(String _id, String _subarch) {
                if(!m_globalPermissions.containsKey(_subarch)) {
                        return null;
                }
                return m_globalPermissions.get(_subarch).remove(_id).m_first;
        }
        
        
        
        
        public boolean needsConsistencyCheck(String _id) {
                return m_localPermissions.get(_id).m_second;
        }
        
        public boolean needsConsistencyCheck(String _id, String _subarch) {
                if(!m_globalPermissions.containsKey(_subarch)) {
                        return false;
                }
                return m_globalPermissions.get(_subarch).get(_id).m_second;
        }
        
        public void consistencyChecked(String _id) {
                 m_localPermissions.get(_id).m_second = false;
        }
        
        public void consistencyChecked(String _id, String _subarch) {
                if(!m_globalPermissions.containsKey(_subarch)) {
                        return ;
                }
                 m_globalPermissions.get(_subarch).get(_id).m_second = false;
        }
        
        
        
}

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