# RemoveRootTarget.java

    /*
     * Copyright 2011, 2012 Odysseus Software GmbH
     *
     * Licensed under the Apache License, Version 2.0 (the "License");
     * you may not use this file except in compliance with the License.
     * You may obtain a copy of the License at
     *
     *     http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */
    package org.apache.synapse.commons.staxon.core.json.stream.util;

    import java.io.IOException;

    import javax.xml.namespace.QName;

    import org.apache.synapse.commons.staxon.core.json.stream.JsonStreamTarget;

    public class RemoveRootTarget extends StreamTargetDelegate {
        private final QName root;
        private final char namespaceSeparator;

        private int depth;

        public RemoveRootTarget(JsonStreamTarget delegate, QName root, char namespaceSeparator) {
            super(delegate);
            this.root = root;
            this.namespaceSeparator = namespaceSeparator;
        }

        @Override
        public void name(String name) throws IOException {
            if (depth > 1) {
                super.name(name);
            } else {
                String localPart = name.substring(name.indexOf(namespaceSeparator) + 1);
                if (!localPart.equals(root.getLocalPart())) {
                    throw new IOException("Unexpected root: " + name);
                }
            }
        }

        @Override
        public void startObject() throws IOException {
            if (depth++ > 0) {
                super.startObject();
            }
        }

        @Override
        public void endObject() throws IOException {
            if (--depth > 0) {
                super.endObject();
            }
        }
    }