--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.chromium.sdk/src/org/chromium/sdk/internal/protocolparser/dynamicimpl/FieldLoader.java	Wed Dec 23 17:13:18 2009 -0800
@@ -0,0 +1,44 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.sdk.internal.protocolparser.dynamicimpl;
+
+import org.chromium.sdk.internal.protocolparser.JsonProtocolParseException;
+
+/**
+ * This classs is responsible for parsing field values and saving them in {@link ObjectData}
+ * for future use.
+ */
+class FieldLoader {
+  private final String fieldName;
+  private final int fieldPosInArray;
+  private final SlowParser<?> slowParser;
+  private final boolean isOptional;
+
+  FieldLoader(int fieldPosInArray, String fieldName, SlowParser<?> slowParser, boolean isOptional) {
+    this.fieldName = fieldName;
+    this.fieldPosInArray = fieldPosInArray;
+    this.slowParser = slowParser;
+    this.isOptional = isOptional;
+  }
+
+  public String getFieldName() {
+    return fieldName;
+  }
+
+  public void parse(boolean hasValue, Object value, ObjectData objectData)
+      throws JsonProtocolParseException {
+    if (hasValue) {
+      try {
+        objectData.getFieldArray()[fieldPosInArray] = slowParser.parseValue(value, objectData);
+      } catch (JsonProtocolParseException e) {
+        throw new JsonProtocolParseException("Failed to parse field " + getFieldName(), e);
+      }
+    } else {
+      if (!isOptional) {
+        throw new JsonProtocolParseException("Field is not optional: " + getFieldName());
+      }
+    }
+  }
+}
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