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Back to the freakoutery. Nathan's going to use the existing (if somewhat

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verbose) mechanisms to accomodate his needs. We freak out as early as possible
to save the developer a time wasting debugging session in situations where they
update only one or the other of the persistent and runtime class, or make a
typo, or get the types wrong, etc.
This commit is contained in:
Michael Bayne
2010-04-10 00:28:26 +00:00
parent a23cb7e4d8
commit 70a16d64ad
1 changed files with 12 additions and 12 deletions
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src/java/com/samskivert/depot/util/RuntimeUtil.java
+12 -12
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@@ -69,8 +69,8 @@ public class RuntimeUtil
/**
* Creates a function that creates an instance of R and initializes all accessible (ie. public)
* fields of R from fields of P with matching name. If the function is applied to null, null
* will be returned. Fields of P that do not exist in R will be ignored and vice versa. See the
* class documentation for a list of field conversions that will be made automatically and the
* will be returned. Fields of P that do not exist in R will be ignored. See the class
* documentation for a list of field conversions that will be made automatically and the
* mechanism for performing other conversions.
*/
public static <P extends PersistentRecord, R> Function<P, R> makeToRuntime (
@@ -86,9 +86,7 @@ public class RuntimeUtil
try {
R object = rclass.newInstance();
for (int ii = 0, ll = rfields.length; ii < ll; ii++) {
if (getters[ii] != null) {
rfields[ii].set(object, getters[ii].get(record));
}
rfields[ii].set(object, getters[ii].get(record));
}
return object;
} catch (Exception e) {
@@ -118,9 +116,7 @@ public class RuntimeUtil
try {
P record = pclass.newInstance();
for (int ii = 0, ll = rfields.length; ii < ll; ii++) {
if (setters[ii] != null) {
setters[ii].set(record, rfields[ii].get(object));
}
setters[ii].set(record, rfields[ii].get(object));
}
return record;
} catch (Exception e) {
@@ -181,7 +177,10 @@ public class RuntimeUtil
// if we have no persistent field for the runtime field, we're now out of luck
if (pfield == null) {
return null;
throw new IllegalArgumentException(
"Cannot create mapping for " + rfield + ". Neither " +
pclass.getSimpleName() + "." + rfield.getName() + " nor " +
rfield.getType() + " " + getter + "() exist.");
}
// if the fields match exactly, return a getter that just gets the field
@@ -204,7 +203,7 @@ public class RuntimeUtil
}
// if we have exhausted all other approaches, we're SOL
return null;
throw new IllegalArgumentException("Cannot map " + pfield + " to " + rfield + ".");
}
protected static Setter makeSetter (Class<?> pclass, final Field pfield, Field rfield)
@@ -224,7 +223,8 @@ public class RuntimeUtil
// if we have no persistent field for this runtime field, we're now out of luck
if (pfield == null) {
return null;
throw new IllegalArgumentException("Cannot create setter for " + rfield + ". " +
"No corresponding field exists in " + pclass + ".");
}
// if the fields match exactly, return a setter that just sets the field
@@ -247,7 +247,7 @@ public class RuntimeUtil
}
// if we have exhausted all other approaches, we're SOL
return null;
throw new IllegalArgumentException("Cannot map " + rfield + " to " + pfield + ".");
}
protected static Field[] getPersistentFields (Class<?> pclass, Field[] rfields)