svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.db / org.gvsig.fmap.dal.db.jdbc / src / main / java / org / gvsig / fmap / dal / store / jdbc2 / spi / JDBCResourcesStorage.java @ 44297
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package org.gvsig.fmap.dal.store.jdbc2.spi; |
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import java.io.ByteArrayInputStream; |
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import java.io.ByteArrayOutputStream; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.OutputStream; |
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import java.net.URL; |
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import java.util.ArrayList; |
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import java.util.List; |
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import org.apache.commons.io.IOUtils; |
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import org.apache.commons.lang3.StringUtils; |
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import org.gvsig.expressionevaluator.ExpressionBuilder; |
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import org.gvsig.expressionevaluator.ExpressionUtils; |
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import org.gvsig.fmap.dal.DALLocator; |
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import org.gvsig.fmap.dal.DataManager; |
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import static org.gvsig.fmap.dal.DataManager.RESOURCES_FIELD_NAME; |
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import static org.gvsig.fmap.dal.DataManager.RESOURCES_FIELD_RESOURCE; |
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import static org.gvsig.fmap.dal.DataManager.RESOURCES_TABLE_NAME; |
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import org.gvsig.fmap.dal.feature.EditableFeature; |
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import org.gvsig.fmap.dal.feature.Feature; |
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import org.gvsig.fmap.dal.feature.FeatureStore; |
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import org.gvsig.fmap.dal.store.jdbc.JDBCStoreParameters; |
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import org.gvsig.tools.dispose.DisposeUtils; |
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import org.gvsig.tools.resourcesstorage.AbstractResourcesStorage; |
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import org.gvsig.tools.resourcesstorage.ResourcesStorage; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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/**
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*
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* @author jjdelcerro
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*/
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@SuppressWarnings("UseSpecificCatch") |
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public class JDBCResourcesStorage extends AbstractResourcesStorage { |
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private static final Logger LOGGER = LoggerFactory.getLogger(JDBCResourcesStorage.class); |
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private static class DataBaseResource implements Resource { |
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private class ResourceInputStream extends InputStream { |
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@Override
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public int read() throws IOException { |
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return in.read();
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} |
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@Override
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public void close() throws IOException { |
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DataBaseResource.this.close(); |
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} |
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} |
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private class ResourceOutputStream extends OutputStream { |
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@Override
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public void write(int b) throws IOException { |
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out.write(b); |
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} |
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@Override
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public void flush() throws IOException { |
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out.flush(); |
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} |
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@Override
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public void close() throws IOException { |
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DataBaseResource.this.close(); |
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} |
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} |
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private final JDBCStoreParameters storeParameters; |
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private final String tableName; |
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private final String name; |
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private ByteArrayInputStream in; |
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private ByteArrayOutputStream out; |
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public DataBaseResource(JDBCStoreParameters storeParameters, String tableName, String name) { |
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this.storeParameters = storeParameters;
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this.tableName = tableName;
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this.name = name;
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} |
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@Override
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public boolean isReadOnly() { |
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return false; |
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} |
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@Override
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public URL getURL() { |
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try {
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String url = this.storeParameters.getUrl(); |
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return new URL(url + "&tableName=" + this.tableName + "&resourceName=" + this.name); |
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} catch (Throwable ex) { |
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return null; |
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} |
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} |
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@Override
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public boolean exists() { |
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FeatureStore store = null;
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try {
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DataManager dataManager = DALLocator.getDataManager(); |
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store = (FeatureStore) dataManager.openStore( |
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this.storeParameters.getDataStoreName(),
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this.storeParameters
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); |
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ExpressionBuilder builder = ExpressionUtils.createExpressionBuilder(); |
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String filter = builder.eq(
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builder.column(RESOURCES_FIELD_NAME), |
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builder.constant(this.tableName+"/"+this.name) |
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).toString(); |
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Feature feature = store.findFirst(filter); |
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return feature!=null; |
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} catch (Throwable ex) { |
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LOGGER.warn("Can't access to the resoure '" + this.getURL() + "'.", ex); |
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} finally {
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DisposeUtils.disposeQuietly(store); |
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} |
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return false; |
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} |
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@Override
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public InputStream asInputStream() throws IOException { |
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if (this.in != null || this.out != null) { |
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throw new IllegalStateException("Resource is already open (" + this.getURL() + ")"); |
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} |
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FeatureStore store = null;
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try {
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DataManager dataManager = DALLocator.getDataManager(); |
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store = (FeatureStore) dataManager.openStore( |
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this.storeParameters.getDataStoreName(),
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this.storeParameters
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); |
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ExpressionBuilder builder = ExpressionUtils.createExpressionBuilder(); |
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String filter = builder.eq(
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builder.column(RESOURCES_FIELD_NAME), |
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builder.constant(this.tableName+"/"+this.name) |
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).toString(); |
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Feature feature = store.findFirst(filter); |
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if (feature == null) { |
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return null; |
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} |
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byte[] resource = feature.getByteArray(RESOURCES_FIELD_RESOURCE); |
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this.in = new ByteArrayInputStream(resource); |
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return new ResourceInputStream(); |
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} catch (Throwable ex) { |
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LOGGER.warn("Can't access to the resoure '" + this.getURL() + "'.", ex); |
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} finally {
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DisposeUtils.disposeQuietly(store); |
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} |
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return null; |
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} |
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@Override
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public OutputStream asOutputStream() throws IOException { |
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if (this.in != null || this.out != null) { |
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throw new IllegalStateException("Resource is already open (" + this.getURL() + ")."); |
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} |
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this.out = new ByteArrayOutputStream(); |
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return new ResourceOutputStream(); |
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} |
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@Override
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public void close() { |
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if (this.in != null) { |
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IOUtils.closeQuietly(this.in);
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this.in = null; |
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} |
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if (this.out != null) { |
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FeatureStore store = null;
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try {
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DataManager dataManager = DALLocator.getDataManager(); |
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store = (FeatureStore) dataManager.openStore( |
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this.storeParameters.getDataStoreName(),
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this.storeParameters
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); |
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store.edit(); |
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ExpressionBuilder builder = ExpressionUtils.createExpressionBuilder(); |
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String filter = builder.eq(
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builder.column(RESOURCES_FIELD_NAME), |
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builder.constant(this.tableName+"/"+this.name) |
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).toString(); |
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Feature feature = store.findFirst(filter); |
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EditableFeature efeature; |
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if (feature == null) { |
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efeature = store.createNewFeature(); |
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efeature.set(RESOURCES_FIELD_NAME, this.tableName+"/"+this.name); |
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efeature.set(RESOURCES_FIELD_RESOURCE, this.out.toByteArray());
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store.insert(efeature); |
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} else {
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efeature = feature.getEditable(); |
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efeature.set(RESOURCES_FIELD_RESOURCE, this.out.toByteArray());
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store.update(efeature); |
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} |
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store.finishEditing(); |
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} catch (Throwable ex) { |
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LOGGER.warn("Can't write the resoure '" + this.getURL() + "'.", ex); |
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} finally {
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DisposeUtils.disposeQuietly(store); |
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} |
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} |
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} |
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} |
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private final JDBCStoreParameters resourcesStoreParameters; |
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private final String tableName; |
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public JDBCResourcesStorage(JDBCStoreParameters resourcesStoreParameters, String tableName) { |
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if( StringUtils.equals(RESOURCES_TABLE_NAME, tableName) ) {
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// No podemos buscar recursos de la tabla de recursos, ya que si no
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// al abrise la tabla de recursos entraria en bucle.
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this.resourcesStoreParameters = null; |
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} else {
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this.resourcesStoreParameters = resourcesStoreParameters;
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} |
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this.tableName = tableName;
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} |
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@Override
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public boolean isEmpty() { |
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return this.resourcesStoreParameters == null; |
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} |
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@Override
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public Resource getResource(String name) { |
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if (this.resourcesStoreParameters == null) { |
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return null; |
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} |
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return new DataBaseResource( |
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this.resourcesStoreParameters,
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this.tableName,
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name |
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); |
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} |
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@Override
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public List<Resource> getResources(String name) { |
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if (this.resourcesStoreParameters == null) { |
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return null; |
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} |
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FeatureStore store = null;
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try {
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DataManager dataManager = DALLocator.getDataManager(); |
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store = (FeatureStore) dataManager.openStore( |
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this.resourcesStoreParameters.getDataStoreName(),
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this.resourcesStoreParameters
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); |
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ExpressionBuilder builder = ExpressionUtils.createExpressionBuilder(); |
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List<ResourcesStorage.Resource> ress = new ArrayList<>(); |
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int n = 0; |
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while (true) { |
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String multiresourceName;
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if (n == 0) { |
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multiresourceName = name; |
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} else {
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multiresourceName = String.valueOf(n) + "." + name; |
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} |
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String filter = builder.eq(
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builder.column(RESOURCES_FIELD_NAME), |
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builder.constant(multiresourceName) |
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).toString(); |
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Feature feature = store.findFirst(filter); |
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if( feature==null ) { |
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break;
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} |
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ress.add(new DataBaseResource(
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this.resourcesStoreParameters,
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this.tableName,
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multiresourceName |
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) |
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); |
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n++; |
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} |
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if (ress.isEmpty()) {
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return null; |
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} |
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return ress;
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} catch (Throwable ex) { |
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LOGGER.warn("Can't get resources for '" + this.resourcesStoreParameters.getUrl()+"&resourceName="+name + "'.", ex); |
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return null; |
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} finally {
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DisposeUtils.disposeQuietly(store); |
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} |
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} |
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} |