IceInternal.ValueWriter Maven / Gradle / Ivy
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Ice is a comprehensive RPC framework that helps you build distributed applications with minimal effort using familiar object-oriented idioms
//
// Copyright (c) ZeroC, Inc. All rights reserved.
//
package IceInternal;
public final class ValueWriter
{
public static void
write(java.lang.Object obj, IceUtilInternal.OutputBase out)
{
writeValue(null, obj, null, out);
}
private static void
writeValue(String name, java.lang.Object value, java.util.Map objectTable,
IceUtilInternal.OutputBase out)
{
if(value == null)
{
writeName(name, out);
out.print("(null)");
}
else
{
Class c = value.getClass();
if(c.equals(Byte.class) || c.equals(Short.class) || c.equals(Integer.class) || c.equals(Long.class) ||
c.equals(Double.class) || c.equals(Float.class) || c.equals(Boolean.class))
{
writeName(name, out);
out.print(value.toString());
}
else if(c.equals(String.class))
{
//
// Indent the lines of a string value.
//
writeName(name, out);
out.print("\"");
out.useCurrentPosAsIndent();
String str = value.toString();
int start = 0, pos;
while(start < str.length() && (pos = str.indexOf('\n', start)) != -1)
{
out.print(str.substring(start, pos));
out.nl();
start = pos + 1;
}
if(start < str.length())
{
out.print(str.substring(start));
}
out.print("\"");
out.restoreIndent();
}
else if(c.isArray())
{
int n = java.lang.reflect.Array.getLength(value);
for(int i = 0; i < n; i++)
{
String elem = (name != null ? name : "");
elem += "[" + i + "]";
writeValue(elem, java.lang.reflect.Array.get(value, i), objectTable, out);
}
}
else if(value instanceof java.util.Map)
{
java.util.Map map = (java.util.Map)value;
java.util.Iterator i = map.entrySet().iterator();
while(i.hasNext())
{
java.util.Map.Entry entry = (java.util.Map.Entry)i.next();
String elem = (name != null ? name + "." : "");
writeValue(elem + "key", entry.getKey(), objectTable, out);
writeValue(elem + "value", entry.getValue(), objectTable, out);
}
}
else if(value instanceof Ice.ObjectPrxHelperBase)
{
writeName(name, out);
Ice.ObjectPrxHelperBase proxy = (Ice.ObjectPrxHelperBase)value;
out.print(proxy._getReference().toString());
}
else if(value instanceof Ice.Object)
{
//
// Check for recursion.
//
if(objectTable != null && objectTable.containsKey(value))
{
writeName(name, out);
out.print("(recursive)");
}
else
{
if(objectTable == null)
{
objectTable = new java.util.IdentityHashMap();
}
objectTable.put(value, null);
writeFields(name, value, c, objectTable, out);
}
}
else if(value instanceof java.lang.Enum)
{
writeName(name, out);
out.print(((java.lang.Enum)value).name());
}
else
{
//
// Must be struct.
//
writeFields(name, value, c, objectTable, out);
}
}
}
private static void
writeFields(String name, java.lang.Object obj, Class c,
java.util.Map objectTable, IceUtilInternal.OutputBase out)
{
if(!c.equals(java.lang.Object.class))
{
//
// Write the superclass first.
//
writeFields(name, obj, c.getSuperclass(), objectTable, out);
//
// Write the declared fields of the given class. We prefer to use the declared
// fields because it includes protected fields that may have been defined using
// the Slice "protected" metadata. However, if a security manager prevents us
// from obtaining the declared fields, we will fall back to using the public ones.
//
java.lang.reflect.Field[] fields = null;
try
{
fields = c.getDeclaredFields();
}
catch(java.lang.SecurityException ex)
{
try
{
fields = c.getFields();
}
catch(java.lang.SecurityException e)
{
return; // Nothing else we can do.
}
}
assert(fields != null);
for(java.lang.reflect.Field field : fields)
{
//
// Only write public, non-static fields.
//
int mods = field.getModifiers();
if(java.lang.reflect.Modifier.isPublic(mods) && !java.lang.reflect.Modifier.isStatic(mods))
{
String fieldName = (name != null ? name + '.' + field.getName() : field.getName());
try
{
java.lang.Object value = field.get(obj);
writeValue(fieldName, value, objectTable, out);
}
catch(IllegalAccessException ex)
{
assert(false);
}
}
}
}
}
private static void
writeName(String name, IceUtilInternal.OutputBase out)
{
if(name != null)
{
out.nl();
out.print(name + " = ");
}
}
}