images/src/org/intellij/images/options/impl/ExternalEditorOptionsImpl.java

/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * 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.
 */

/** $Id$ */

package org.intellij.images.options.impl;

import com.intellij.openapi.util.JDOMExternalizable;
import com.intellij.openapi.util.JDOMExternalizer;
import org.intellij.images.options.ExternalEditorOptions;
import org.jdom.Element;

import java.beans.PropertyChangeSupport;

/**
 * External editor options.
 *
 * @author <a href="mailto:aefimov.box@gmail.com">Alexey Efimov</a>
 */
final class ExternalEditorOptionsImpl implements ExternalEditorOptions, JDOMExternalizable {
    private final PropertyChangeSupport propertyChangeSupport;
    private String executablePath;

    public ExternalEditorOptionsImpl(PropertyChangeSupport propertyChangeSupport) {
        this.propertyChangeSupport = propertyChangeSupport;
    }

    public String getExecutablePath() {
        return executablePath;
    }

    void setExecutablePath(String executablePath) {
        String oldValue = this.executablePath;
        if (oldValue != null && !oldValue.equals(executablePath) || oldValue == null && executablePath != null) {
            this.executablePath = executablePath;
            propertyChangeSupport.firePropertyChange(ATTR_EXECUTABLE_PATH, oldValue, this.executablePath);
        }
    }

    public ExternalEditorOptions clone() throws CloneNotSupportedException {
        return (ExternalEditorOptions)super.clone();
    }

    public void inject(ExternalEditorOptions options) {
        setExecutablePath(options.getExecutablePath());
    }

    public boolean setOption(String name, Object value) {
        if (ATTR_EXECUTABLE_PATH.equals(name)) {
            setExecutablePath((String) value);
        } else {
            return false;
        }
        return true;
    }

    public void readExternal(Element element) {
        executablePath = JDOMExternalizer.readString(element, ATTR_EXECUTABLE_PATH);
    }

    public void writeExternal(Element element) {
        JDOMExternalizer.write(element, ATTR_EXECUTABLE_PATH, executablePath);
    }

    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (!(o instanceof ExternalEditorOptions)) {
            return false;
        }

        ExternalEditorOptions otherOptions = (ExternalEditorOptions) o;

        return executablePath != null ?
            executablePath.equals(otherOptions.getExecutablePath()) :
            otherOptions.getExecutablePath() == null;

    }

    public int hashCode() {
        return executablePath != null ? executablePath.hashCode() : 0;
    }
}