org.waveprotocol.wave.client.wavepanel.view.fake.FakeAnchor.java Source code

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Here is the source code for org.waveprotocol.wave.client.wavepanel.view.fake.FakeAnchor.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.waveprotocol.wave.client.wavepanel.view.fake;

import com.google.common.base.Preconditions;

import org.waveprotocol.wave.client.wavepanel.view.AnchorView;
import org.waveprotocol.wave.client.wavepanel.view.InlineThreadView;
import org.waveprotocol.wave.client.wavepanel.view.View;

/**
 * Fake, pojo implementation of a thread anchor.
 *
 */
public final class FakeAnchor implements AnchorView {

    private FakeBlipView blip;
    private FakeBlipMetaView meta;

    private FakeInlineThreadView attached;

    FakeAnchor() {
    }

    void setContainer(FakeBlipView container) {
        Preconditions.checkState(blip == null && meta == null);
        this.blip = container;
    }

    void setContainer(FakeBlipMetaView container) {
        Preconditions.checkState(blip == null && meta == null);
        this.meta = container;
    }

    @Override
    public void attach(InlineThreadView view) {
        Preconditions.checkState(attached == null);
        Preconditions.checkArgument(view != null);
        attached = ((FakeInlineThreadView) view);
        attached.attachTo(this);
    }

    @Override
    public void detach(InlineThreadView view) {
        Preconditions.checkArgument(view != null);
        Preconditions.checkState(attached == view);
        attached.detach();
        attached = null;
    }

    @Override
    public FakeInlineThreadView getThread() {
        return attached;
    }

    @Override
    public Type getType() {
        return Type.ANCHOR;
    }

    @Override
    public void remove() {
        throw new UnsupportedOperationException("Anchors do not remove themselves");
    }

    @Override
    public View getParent() {
        return blip != null ? blip : meta;
    }

    @Override
    public String toString() {
        return "Anchor [" + (attached != null ? attached : "") + "]";
    }
}